Changeset de99a5f0 in sasview for src/sas/sascalc/dataloader
- Timestamp:
- Apr 9, 2017 4:51:00 AM (8 years ago)
- Branches:
- master, ESS_GUI, ESS_GUI_Docs, ESS_GUI_batch_fitting, ESS_GUI_bumps_abstraction, ESS_GUI_iss1116, ESS_GUI_iss879, ESS_GUI_iss959, ESS_GUI_opencl, ESS_GUI_ordering, ESS_GUI_sync_sascalc, costrafo411, magnetic_scatt, release-4.2.2, ticket-1009, ticket-1094-headless, ticket-1242-2d-resolution, ticket-1243, ticket-1249, ticket885, unittest-saveload
- Children:
- 6c497b7
- Parents:
- c0ca2e3d (diff), ec65dc81 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent. - File:
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src/sas/sascalc/dataloader/manipulations.py
r959eb01 rc0ca2e3d 1 from __future__ import division 1 2 """ 2 3 Data manipulations for 2D data sets. 3 4 Using the meta data information, various types of averaging 4 5 are performed in Q-space 6 7 To test this module use: 8 ``` 9 cd test 10 PYTHONPATH=../src/ python2 -m sasdataloader.test.utest_averaging DataInfoTests.test_sectorphi_quarter 11 ``` 5 12 """ 6 13 ##################################################################### 7 # This software was developed by the University of Tennessee as part of the8 # Distributed Data Analysis of Neutron Scattering Experiments (DANSE)9 # project funded by the US National Science Foundation.10 # See the license text in license.txt11 # copyright 2008, University of Tennessee14 # This software was developed by the University of Tennessee as part of the 15 # Distributed Data Analysis of Neutron Scattering Experiments (DANSE) 16 # project funded by the US National Science Foundation. 17 # See the license text in license.txt 18 # copyright 2008, University of Tennessee 12 19 ###################################################################### 13 20 14 #TODO: copy the meta data from the 2D object to the resulting 1D object 21 22 # TODO: copy the meta data from the 2D object to the resulting 1D object 15 23 import math 16 import numpy 17 24 import numpy as np 25 import sys 26 18 27 #from data_info import plottable_2D 19 28 from data_info import Data1D … … 70 79 return phi_out 71 80 72 73 def reader2D_converter(data2d=None):74 """75 convert old 2d format opened by IhorReader or danse_reader76 to new Data2D format77 78 :param data2d: 2d array of Data2D object79 :return: 1d arrays of Data2D object80 81 """82 if data2d.data is None or data2d.x_bins is None or data2d.y_bins is None:83 raise ValueError, "Can't convert this data: data=None..."84 new_x = numpy.tile(data2d.x_bins, (len(data2d.y_bins), 1))85 new_y = numpy.tile(data2d.y_bins, (len(data2d.x_bins), 1))86 new_y = new_y.swapaxes(0, 1)87 88 new_data = data2d.data.flatten()89 qx_data = new_x.flatten()90 qy_data = new_y.flatten()91 q_data = numpy.sqrt(qx_data * qx_data + qy_data * qy_data)92 if data2d.err_data is None or numpy.any(data2d.err_data <= 0):93 new_err_data = numpy.sqrt(numpy.abs(new_data))94 else:95 new_err_data = data2d.err_data.flatten()96 mask = numpy.ones(len(new_data), dtype=bool)97 98 #TODO: make sense of the following two lines...99 #from sas.sascalc.dataloader.data_info import Data2D100 #output = Data2D()101 output = data2d102 output.data = new_data103 output.err_data = new_err_data104 output.qx_data = qx_data105 output.qy_data = qy_data106 output.q_data = q_data107 output.mask = mask108 109 return output110 111 112 class _Slab(object):113 """114 Compute average I(Q) for a region of interest115 """116 def __init__(self, x_min=0.0, x_max=0.0, y_min=0.0,117 y_max=0.0, bin_width=0.001):118 # Minimum Qx value [A-1]119 self.x_min = x_min120 # Maximum Qx value [A-1]121 self.x_max = x_max122 # Minimum Qy value [A-1]123 self.y_min = y_min124 # Maximum Qy value [A-1]125 self.y_max = y_max126 # Bin width (step size) [A-1]127 self.bin_width = bin_width128 # If True, I(|Q|) will be return, otherwise,129 # negative q-values are allowed130 self.fold = False131 132 def __call__(self, data2D):133 return NotImplemented134 135 def _avg(self, data2D, maj):136 """137 Compute average I(Q_maj) for a region of interest.138 The major axis is defined as the axis of Q_maj.139 The minor axis is the axis that we average over.140 141 :param data2D: Data2D object142 :param maj_min: min value on the major axis143 :return: Data1D object144 """145 if len(data2D.detector) > 1:146 msg = "_Slab._avg: invalid number of "147 msg += " detectors: %g" % len(data2D.detector)148 raise RuntimeError, msg149 150 # Get data151 data = data2D.data[numpy.isfinite(data2D.data)]152 err_data = data2D.err_data[numpy.isfinite(data2D.data)]153 qx_data = data2D.qx_data[numpy.isfinite(data2D.data)]154 qy_data = data2D.qy_data[numpy.isfinite(data2D.data)]155 156 # Build array of Q intervals157 if maj == 'x':158 if self.fold:159 x_min = 0160 else:161 x_min = self.x_min162 nbins = int(math.ceil((self.x_max - x_min) / self.bin_width))163 elif maj == 'y':164 if self.fold:165 y_min = 0166 else:167 y_min = self.y_min168 nbins = int(math.ceil((self.y_max - y_min) / self.bin_width))169 else:170 raise RuntimeError, "_Slab._avg: unrecognized axis %s" % str(maj)171 172 x = numpy.zeros(nbins)173 y = numpy.zeros(nbins)174 err_y = numpy.zeros(nbins)175 y_counts = numpy.zeros(nbins)176 177 # Average pixelsize in q space178 for npts in range(len(data)):179 # default frac180 frac_x = 0181 frac_y = 0182 # get ROI183 if self.x_min <= qx_data[npts] and self.x_max > qx_data[npts]:184 frac_x = 1185 if self.y_min <= qy_data[npts] and self.y_max > qy_data[npts]:186 frac_y = 1187 frac = frac_x * frac_y188 189 if frac == 0:190 continue191 # binning: find axis of q192 if maj == 'x':193 q_value = qx_data[npts]194 min_value = x_min195 if maj == 'y':196 q_value = qy_data[npts]197 min_value = y_min198 if self.fold and q_value < 0:199 q_value = -q_value200 # bin201 i_q = int(math.ceil((q_value - min_value) / self.bin_width)) - 1202 203 # skip outside of max bins204 if i_q < 0 or i_q >= nbins:205 continue206 207 #TODO: find better definition of x[i_q] based on q_data208 # min_value + (i_q + 1) * self.bin_width / 2.0209 x[i_q] += frac * q_value210 y[i_q] += frac * data[npts]211 212 if err_data == None or err_data[npts] == 0.0:213 if data[npts] < 0:214 data[npts] = -data[npts]215 err_y[i_q] += frac * frac * data[npts]216 else:217 err_y[i_q] += frac * frac * err_data[npts] * err_data[npts]218 y_counts[i_q] += frac219 220 # Average the sums221 for n in range(nbins):222 err_y[n] = math.sqrt(err_y[n])223 224 err_y = err_y / y_counts225 y = y / y_counts226 x = x / y_counts227 idx = (numpy.isfinite(y) & numpy.isfinite(x))228 229 if not idx.any():230 msg = "Average Error: No points inside ROI to average..."231 raise ValueError, msg232 return Data1D(x=x[idx], y=y[idx], dy=err_y[idx])233 234 235 class SlabY(_Slab):236 """237 Compute average I(Qy) for a region of interest238 """239 def __call__(self, data2D):240 """241 Compute average I(Qy) for a region of interest242 243 :param data2D: Data2D object244 :return: Data1D object245 """246 return self._avg(data2D, 'y')247 248 249 class SlabX(_Slab):250 """251 Compute average I(Qx) for a region of interest252 """253 def __call__(self, data2D):254 """255 Compute average I(Qx) for a region of interest256 :param data2D: Data2D object257 :return: Data1D object258 """259 return self._avg(data2D, 'x')260 261 262 class Boxsum(object):263 """264 Perform the sum of counts in a 2D region of interest.265 """266 def __init__(self, x_min=0.0, x_max=0.0, y_min=0.0, y_max=0.0):267 # Minimum Qx value [A-1]268 self.x_min = x_min269 # Maximum Qx value [A-1]270 self.x_max = x_max271 # Minimum Qy value [A-1]272 self.y_min = y_min273 # Maximum Qy value [A-1]274 self.y_max = y_max275 276 def __call__(self, data2D):277 """278 Perform the sum in the region of interest279 280 :param data2D: Data2D object281 :return: number of counts, error on number of counts,282 number of points summed283 """284 y, err_y, y_counts = self._sum(data2D)285 286 # Average the sums287 counts = 0 if y_counts == 0 else y288 error = 0 if y_counts == 0 else math.sqrt(err_y)289 290 # Added y_counts to return, SMK & PDB, 04/03/2013291 return counts, error, y_counts292 293 def _sum(self, data2D):294 """295 Perform the sum in the region of interest296 297 :param data2D: Data2D object298 :return: number of counts,299 error on number of counts, number of entries summed300 """301 if len(data2D.detector) > 1:302 msg = "Circular averaging: invalid number "303 msg += "of detectors: %g" % len(data2D.detector)304 raise RuntimeError, msg305 # Get data306 data = data2D.data[numpy.isfinite(data2D.data)]307 err_data = data2D.err_data[numpy.isfinite(data2D.data)]308 qx_data = data2D.qx_data[numpy.isfinite(data2D.data)]309 qy_data = data2D.qy_data[numpy.isfinite(data2D.data)]310 311 y = 0.0312 err_y = 0.0313 y_counts = 0.0314 315 # Average pixelsize in q space316 for npts in range(len(data)):317 # default frac318 frac_x = 0319 frac_y = 0320 321 # get min and max at each points322 qx = qx_data[npts]323 qy = qy_data[npts]324 325 # get the ROI326 if self.x_min <= qx and self.x_max > qx:327 frac_x = 1328 if self.y_min <= qy and self.y_max > qy:329 frac_y = 1330 #Find the fraction along each directions331 frac = frac_x * frac_y332 if frac == 0:333 continue334 y += frac * data[npts]335 if err_data == None or err_data[npts] == 0.0:336 if data[npts] < 0:337 data[npts] = -data[npts]338 err_y += frac * frac * data[npts]339 else:340 err_y += frac * frac * err_data[npts] * err_data[npts]341 y_counts += frac342 return y, err_y, y_counts343 344 345 class Boxavg(Boxsum):346 """347 Perform the average of counts in a 2D region of interest.348 """349 def __init__(self, x_min=0.0, x_max=0.0, y_min=0.0, y_max=0.0):350 super(Boxavg, self).__init__(x_min=x_min, x_max=x_max,351 y_min=y_min, y_max=y_max)352 353 def __call__(self, data2D):354 """355 Perform the sum in the region of interest356 357 :param data2D: Data2D object358 :return: average counts, error on average counts359 360 """361 y, err_y, y_counts = self._sum(data2D)362 363 # Average the sums364 counts = 0 if y_counts == 0 else y / y_counts365 error = 0 if y_counts == 0 else math.sqrt(err_y) / y_counts366 367 return counts, error368 369 370 81 def get_pixel_fraction_square(x, xmin, xmax): 371 82 """ … … 390 101 return 1.0 391 102 392 393 class CircularAverage(object): 394 """ 395 Perform circular averaging on 2D data 396 397 The data returned is the distribution of counts 398 as a function of Q 399 """ 400 def __init__(self, r_min=0.0, r_max=0.0, bin_width=0.0005): 401 # Minimum radius included in the average [A-1] 402 self.r_min = r_min 403 # Maximum radius included in the average [A-1] 404 self.r_max = r_max 405 # Bin width (step size) [A-1] 406 self.bin_width = bin_width 407 408 def __call__(self, data2D, ismask=False): 409 """ 410 Perform circular averaging on the data 411 412 :param data2D: Data2D object 413 :return: Data1D object 414 """ 415 # Get data W/ finite values 416 data = data2D.data[numpy.isfinite(data2D.data)] 417 q_data = data2D.q_data[numpy.isfinite(data2D.data)] 418 err_data = data2D.err_data[numpy.isfinite(data2D.data)] 419 mask_data = data2D.mask[numpy.isfinite(data2D.data)] 420 421 dq_data = None 422 423 # Get the dq for resolution averaging 424 if data2D.dqx_data != None and data2D.dqy_data != None: 425 # The pinholes and det. pix contribution present 426 # in both direction of the 2D which must be subtracted when 427 # converting to 1D: dq_overlap should calculated ideally at 428 # q = 0. Note This method works on only pinhole geometry. 429 # Extrapolate dqx(r) and dqy(phi) at q = 0, and take an average. 430 z_max = max(data2D.q_data) 431 z_min = min(data2D.q_data) 432 x_max = data2D.dqx_data[data2D.q_data[z_max]] 433 x_min = data2D.dqx_data[data2D.q_data[z_min]] 434 y_max = data2D.dqy_data[data2D.q_data[z_max]] 435 y_min = data2D.dqy_data[data2D.q_data[z_min]] 436 # Find qdx at q = 0 437 dq_overlap_x = (x_min * z_max - x_max * z_min) / (z_max - z_min) 438 # when extrapolation goes wrong 439 if dq_overlap_x > min(data2D.dqx_data): 440 dq_overlap_x = min(data2D.dqx_data) 441 dq_overlap_x *= dq_overlap_x 442 # Find qdx at q = 0 443 dq_overlap_y = (y_min * z_max - y_max * z_min) / (z_max - z_min) 444 # when extrapolation goes wrong 445 if dq_overlap_y > min(data2D.dqy_data): 446 dq_overlap_y = min(data2D.dqy_data) 447 # get dq at q=0. 448 dq_overlap_y *= dq_overlap_y 449 450 dq_overlap = numpy.sqrt((dq_overlap_x + dq_overlap_y) / 2.0) 451 # Final protection of dq 452 if dq_overlap < 0: 453 dq_overlap = y_min 454 dqx_data = data2D.dqx_data[numpy.isfinite(data2D.data)] 455 dqy_data = data2D.dqy_data[numpy.isfinite(data2D.data)] - dq_overlap 456 # def; dqx_data = dq_r dqy_data = dq_phi 457 # Convert dq 2D to 1D here 458 dqx = dqx_data * dqx_data 459 dqy = dqy_data * dqy_data 460 dq_data = numpy.add(dqx, dqy) 461 dq_data = numpy.sqrt(dq_data) 462 463 #q_data_max = numpy.max(q_data) 464 if len(data2D.q_data) == None: 465 msg = "Circular averaging: invalid q_data: %g" % data2D.q_data 466 raise RuntimeError, msg 467 468 # Build array of Q intervals 469 nbins = int(math.ceil((self.r_max - self.r_min) / self.bin_width)) 470 471 x = numpy.zeros(nbins) 472 y = numpy.zeros(nbins) 473 err_y = numpy.zeros(nbins) 474 err_x = numpy.zeros(nbins) 475 y_counts = numpy.zeros(nbins) 476 477 for npt in range(len(data)): 478 479 if ismask and not mask_data[npt]: 480 continue 481 482 frac = 0 483 484 # q-value at the pixel (j,i) 485 q_value = q_data[npt] 486 data_n = data[npt] 487 488 ## No need to calculate the frac when all data are within range 489 if self.r_min >= self.r_max: 490 raise ValueError, "Limit Error: min > max" 491 492 if self.r_min <= q_value and q_value <= self.r_max: 493 frac = 1 494 if frac == 0: 495 continue 496 i_q = int(math.floor((q_value - self.r_min) / self.bin_width)) 497 498 # Take care of the edge case at phi = 2pi. 499 if i_q == nbins: 500 i_q = nbins - 1 501 y[i_q] += frac * data_n 502 # Take dqs from data to get the q_average 503 x[i_q] += frac * q_value 504 if err_data == None or err_data[npt] == 0.0: 505 if data_n < 0: 506 data_n = -data_n 507 err_y[i_q] += frac * frac * data_n 508 else: 509 err_y[i_q] += frac * frac * err_data[npt] * err_data[npt] 510 if dq_data != None: 511 # To be consistent with dq calculation in 1d reduction, 512 # we need just the averages (not quadratures) because 513 # it should not depend on the number of the q points 514 # in the qr bins. 515 err_x[i_q] += frac * dq_data[npt] 516 else: 517 err_x = None 518 y_counts[i_q] += frac 519 520 # Average the sums 521 for n in range(nbins): 522 if err_y[n] < 0: 523 err_y[n] = -err_y[n] 524 err_y[n] = math.sqrt(err_y[n]) 525 #if err_x != None: 526 # err_x[n] = math.sqrt(err_x[n]) 527 528 err_y = err_y / y_counts 529 err_y[err_y == 0] = numpy.average(err_y) 530 y = y / y_counts 531 x = x / y_counts 532 idx = (numpy.isfinite(y)) & (numpy.isfinite(x)) 533 534 if err_x != None: 535 d_x = err_x[idx] / y_counts[idx] 536 else: 537 d_x = None 538 539 if not idx.any(): 540 msg = "Average Error: No points inside ROI to average..." 541 raise ValueError, msg 542 543 return Data1D(x=x[idx], y=y[idx], dy=err_y[idx], dx=d_x) 544 545 546 class Ring(object): 547 """ 548 Defines a ring on a 2D data set. 549 The ring is defined by r_min, r_max, and 550 the position of the center of the ring. 551 552 The data returned is the distribution of counts 553 around the ring as a function of phi. 554 555 Phi_min and phi_max should be defined between 0 and 2*pi 556 in anti-clockwise starting from the x- axis on the left-hand side 557 """ 558 #Todo: remove center. 559 def __init__(self, r_min=0, r_max=0, center_x=0, center_y=0, nbins=36): 560 # Minimum radius 561 self.r_min = r_min 562 # Maximum radius 563 self.r_max = r_max 564 # Center of the ring in x 565 self.center_x = center_x 566 # Center of the ring in y 567 self.center_y = center_y 568 # Number of angular bins 569 self.nbins_phi = nbins 570 571 572 def __call__(self, data2D): 573 """ 574 Apply the ring to the data set. 575 Returns the angular distribution for a given q range 576 577 :param data2D: Data2D object 578 579 :return: Data1D object 580 """ 581 if data2D.__class__.__name__ not in ["Data2D", "plottable_2D"]: 582 raise RuntimeError, "Ring averaging only take plottable_2D objects" 583 584 Pi = math.pi 585 586 # Get data 587 data = data2D.data[numpy.isfinite(data2D.data)] 588 q_data = data2D.q_data[numpy.isfinite(data2D.data)] 589 err_data = data2D.err_data[numpy.isfinite(data2D.data)] 590 qx_data = data2D.qx_data[numpy.isfinite(data2D.data)] 591 qy_data = data2D.qy_data[numpy.isfinite(data2D.data)] 592 593 # Set space for 1d outputs 594 phi_bins = numpy.zeros(self.nbins_phi) 595 phi_counts = numpy.zeros(self.nbins_phi) 596 phi_values = numpy.zeros(self.nbins_phi) 597 phi_err = numpy.zeros(self.nbins_phi) 598 599 # Shift to apply to calculated phi values in order 600 # to center first bin at zero 601 phi_shift = Pi / self.nbins_phi 602 603 for npt in range(len(data)): 604 frac = 0 605 # q-value at the point (npt) 606 q_value = q_data[npt] 607 data_n = data[npt] 608 609 # phi-value at the point (npt) 610 phi_value = math.atan2(qy_data[npt], qx_data[npt]) + Pi 611 612 if self.r_min <= q_value and q_value <= self.r_max: 613 frac = 1 614 if frac == 0: 615 continue 616 # binning 617 i_phi = int(math.floor((self.nbins_phi) * \ 618 (phi_value + phi_shift) / (2 * Pi))) 619 620 # Take care of the edge case at phi = 2pi. 621 if i_phi >= self.nbins_phi: 622 i_phi = 0 623 phi_bins[i_phi] += frac * data[npt] 624 625 if err_data == None or err_data[npt] == 0.0: 626 if data_n < 0: 627 data_n = -data_n 628 phi_err[i_phi] += frac * frac * math.fabs(data_n) 629 else: 630 phi_err[i_phi] += frac * frac * err_data[npt] * err_data[npt] 631 phi_counts[i_phi] += frac 632 633 for i in range(self.nbins_phi): 634 phi_bins[i] = phi_bins[i] / phi_counts[i] 635 phi_err[i] = math.sqrt(phi_err[i]) / phi_counts[i] 636 phi_values[i] = 2.0 * math.pi / self.nbins_phi * (1.0 * i) 637 638 idx = (numpy.isfinite(phi_bins)) 639 640 if not idx.any(): 641 msg = "Average Error: No points inside ROI to average..." 642 raise ValueError, msg 643 #elif len(phi_bins[idx])!= self.nbins_phi: 644 # print "resulted",self.nbins_phi- len(phi_bins[idx]) 645 #,"empty bin(s) due to tight binning..." 646 return Data1D(x=phi_values[idx], y=phi_bins[idx], dy=phi_err[idx]) 647 103 def get_intercept(q, q_0, q_1): 104 """ 105 Returns the fraction of the side at which the 106 q-value intercept the pixel, None otherwise. 107 The values returned is the fraction ON THE SIDE 108 OF THE LOWEST Q. :: 109 110 A B 111 +-----------+--------+ <--- pixel size 112 0 1 113 Q_0 -------- Q ----- Q_1 <--- equivalent Q range 114 if Q_1 > Q_0, A is returned 115 if Q_1 < Q_0, B is returned 116 if Q is outside the range of [Q_0, Q_1], None is returned 117 118 """ 119 if q_1 > q_0: 120 if q > q_0 and q <= q_1: 121 return (q - q_0) / (q_1 - q_0) 122 else: 123 if q > q_1 and q <= q_0: 124 return (q - q_1) / (q_0 - q_1) 125 return None 648 126 649 127 def get_pixel_fraction(qmax, q_00, q_01, q_10, q_11): … … 710 188 return frac_max 711 189 712 713 def get_intercept(q, q_0, q_1): 714 """ 715 Returns the fraction of the side at which the 716 q-value intercept the pixel, None otherwise. 717 The values returned is the fraction ON THE SIDE 718 OF THE LOWEST Q. :: 719 720 A B 721 +-----------+--------+ <--- pixel size 722 0 1 723 Q_0 -------- Q ----- Q_1 <--- equivalent Q range 724 if Q_1 > Q_0, A is returned 725 if Q_1 < Q_0, B is returned 726 if Q is outside the range of [Q_0, Q_1], None is returned 727 728 """ 729 if q_1 > q_0: 730 if q > q_0 and q <= q_1: 731 return (q - q_0) / (q_1 - q_0) 190 def get_dq_data(data2D): 191 ''' 192 Get the dq for resolution averaging 193 The pinholes and det. pix contribution present 194 in both direction of the 2D which must be subtracted when 195 converting to 1D: dq_overlap should calculated ideally at 196 q = 0. Note This method works on only pinhole geometry. 197 Extrapolate dqx(r) and dqy(phi) at q = 0, and take an average. 198 ''' 199 z_max = max(data2D.q_data) 200 z_min = min(data2D.q_data) 201 x_max = data2D.dqx_data[data2D.q_data[z_max]] 202 x_min = data2D.dqx_data[data2D.q_data[z_min]] 203 y_max = data2D.dqy_data[data2D.q_data[z_max]] 204 y_min = data2D.dqy_data[data2D.q_data[z_min]] 205 # Find qdx at q = 0 206 dq_overlap_x = (x_min * z_max - x_max * z_min) / (z_max - z_min) 207 # when extrapolation goes wrong 208 if dq_overlap_x > min(data2D.dqx_data): 209 dq_overlap_x = min(data2D.dqx_data) 210 dq_overlap_x *= dq_overlap_x 211 # Find qdx at q = 0 212 dq_overlap_y = (y_min * z_max - y_max * z_min) / (z_max - z_min) 213 # when extrapolation goes wrong 214 if dq_overlap_y > min(data2D.dqy_data): 215 dq_overlap_y = min(data2D.dqy_data) 216 # get dq at q=0. 217 dq_overlap_y *= dq_overlap_y 218 219 dq_overlap = np.sqrt((dq_overlap_x + dq_overlap_y) / 2.0) 220 # Final protection of dq 221 if dq_overlap < 0: 222 dq_overlap = y_min 223 dqx_data = data2D.dqx_data[np.isfinite(data2D.data)] 224 dqy_data = data2D.dqy_data[np.isfinite( 225 data2D.data)] - dq_overlap 226 # def; dqx_data = dq_r dqy_data = dq_phi 227 # Convert dq 2D to 1D here 228 dq_data = np.sqrt(dqx_data**2 + dqx_data**2) 229 return dq_data 230 231 ################################################################################ 232 233 def reader2D_converter(data2d=None): 234 """ 235 convert old 2d format opened by IhorReader or danse_reader 236 to new Data2D format 237 This is mainly used by the Readers 238 239 :param data2d: 2d array of Data2D object 240 :return: 1d arrays of Data2D object 241 242 """ 243 if data2d.data is None or data2d.x_bins is None or data2d.y_bins is None: 244 raise ValueError("Can't convert this data: data=None...") 245 new_x = np.tile(data2d.x_bins, (len(data2d.y_bins), 1)) 246 new_y = np.tile(data2d.y_bins, (len(data2d.x_bins), 1)) 247 new_y = new_y.swapaxes(0, 1) 248 249 new_data = data2d.data.flatten() 250 qx_data = new_x.flatten() 251 qy_data = new_y.flatten() 252 q_data = np.sqrt(qx_data * qx_data + qy_data * qy_data) 253 if data2d.err_data is None or np.any(data2d.err_data <= 0): 254 new_err_data = np.sqrt(np.abs(new_data)) 732 255 else: 733 if q > q_1 and q <= q_0: 734 return (q - q_1) / (q_0 - q_1) 735 return None 736 256 new_err_data = data2d.err_data.flatten() 257 mask = np.ones(len(new_data), dtype=bool) 258 259 # TODO: make sense of the following two lines... 260 #from sas.sascalc.dataloader.data_info import Data2D 261 #output = Data2D() 262 output = data2d 263 output.data = new_data 264 output.err_data = new_err_data 265 output.qx_data = qx_data 266 output.qy_data = qy_data 267 output.q_data = q_data 268 output.mask = mask 269 270 return output 271 272 ################################################################################ 273 274 class Binning(object): 275 ''' 276 This class just creates a binning object 277 either linear or log 278 ''' 279 280 def __init__(self, min_value, max_value, n_bins, base=None): 281 ''' 282 if base is None: Linear binning 283 ''' 284 self.min = min_value if min_value > 0 else 0.0001 285 self.max = max_value 286 self.n_bins = n_bins 287 self.base = base 288 289 def get_bin_index(self, value): 290 ''' 291 The general formula logarithm binning is: 292 bin = floor(N * (log(x) - log(min)) / (log(max) - log(min))) 293 ''' 294 if self.base: 295 temp_x = self.n_bins * (math.log(value, self.base) - math.log(self.min, self.base)) 296 temp_y = math.log(self.max, self.base) - math.log(self.min, self.base) 297 else: 298 temp_x = self.n_bins * (value - self.min) 299 temp_y = self.max - self.min 300 # Bin index calulation 301 return int(math.floor(temp_x / temp_y)) 302 303 304 ################################################################################ 305 306 class _Slab(object): 307 """ 308 Compute average I(Q) for a region of interest 309 """ 310 311 def __init__(self, x_min=0.0, x_max=0.0, y_min=0.0, 312 y_max=0.0, bin_width=0.001): 313 # Minimum Qx value [A-1] 314 self.x_min = x_min 315 # Maximum Qx value [A-1] 316 self.x_max = x_max 317 # Minimum Qy value [A-1] 318 self.y_min = y_min 319 # Maximum Qy value [A-1] 320 self.y_max = y_max 321 # Bin width (step size) [A-1] 322 self.bin_width = bin_width 323 # If True, I(|Q|) will be return, otherwise, 324 # negative q-values are allowed 325 self.fold = False 326 327 def __call__(self, data2D): 328 return NotImplemented 329 330 def _avg(self, data2D, maj): 331 """ 332 Compute average I(Q_maj) for a region of interest. 333 The major axis is defined as the axis of Q_maj. 334 The minor axis is the axis that we average over. 335 336 :param data2D: Data2D object 337 :param maj_min: min value on the major axis 338 :return: Data1D object 339 """ 340 if len(data2D.detector) > 1: 341 msg = "_Slab._avg: invalid number of " 342 msg += " detectors: %g" % len(data2D.detector) 343 raise RuntimeError(msg) 344 345 # Get data 346 data = data2D.data[np.isfinite(data2D.data)] 347 err_data = data2D.err_data[np.isfinite(data2D.data)] 348 qx_data = data2D.qx_data[np.isfinite(data2D.data)] 349 qy_data = data2D.qy_data[np.isfinite(data2D.data)] 350 351 # Build array of Q intervals 352 if maj == 'x': 353 if self.fold: 354 x_min = 0 355 else: 356 x_min = self.x_min 357 nbins = int(math.ceil((self.x_max - x_min) / self.bin_width)) 358 elif maj == 'y': 359 if self.fold: 360 y_min = 0 361 else: 362 y_min = self.y_min 363 nbins = int(math.ceil((self.y_max - y_min) / self.bin_width)) 364 else: 365 raise RuntimeError("_Slab._avg: unrecognized axis %s" % str(maj)) 366 367 x = np.zeros(nbins) 368 y = np.zeros(nbins) 369 err_y = np.zeros(nbins) 370 y_counts = np.zeros(nbins) 371 372 # Average pixelsize in q space 373 for npts in range(len(data)): 374 # default frac 375 frac_x = 0 376 frac_y = 0 377 # get ROI 378 if self.x_min <= qx_data[npts] and self.x_max > qx_data[npts]: 379 frac_x = 1 380 if self.y_min <= qy_data[npts] and self.y_max > qy_data[npts]: 381 frac_y = 1 382 frac = frac_x * frac_y 383 384 if frac == 0: 385 continue 386 # binning: find axis of q 387 if maj == 'x': 388 q_value = qx_data[npts] 389 min_value = x_min 390 if maj == 'y': 391 q_value = qy_data[npts] 392 min_value = y_min 393 if self.fold and q_value < 0: 394 q_value = -q_value 395 # bin 396 i_q = int(math.ceil((q_value - min_value) / self.bin_width)) - 1 397 398 # skip outside of max bins 399 if i_q < 0 or i_q >= nbins: 400 continue 401 402 # TODO: find better definition of x[i_q] based on q_data 403 # min_value + (i_q + 1) * self.bin_width / 2.0 404 x[i_q] += frac * q_value 405 y[i_q] += frac * data[npts] 406 407 if err_data is None or err_data[npts] == 0.0: 408 if data[npts] < 0: 409 data[npts] = -data[npts] 410 err_y[i_q] += frac * frac * data[npts] 411 else: 412 err_y[i_q] += frac * frac * err_data[npts] * err_data[npts] 413 y_counts[i_q] += frac 414 415 # Average the sums 416 for n in range(nbins): 417 err_y[n] = math.sqrt(err_y[n]) 418 419 err_y = err_y / y_counts 420 y = y / y_counts 421 x = x / y_counts 422 idx = (np.isfinite(y) & np.isfinite(x)) 423 424 if not idx.any(): 425 msg = "Average Error: No points inside ROI to average..." 426 raise ValueError(msg) 427 return Data1D(x=x[idx], y=y[idx], dy=err_y[idx]) 428 429 430 class SlabY(_Slab): 431 """ 432 Compute average I(Qy) for a region of interest 433 """ 434 435 def __call__(self, data2D): 436 """ 437 Compute average I(Qy) for a region of interest 438 439 :param data2D: Data2D object 440 :return: Data1D object 441 """ 442 return self._avg(data2D, 'y') 443 444 445 class SlabX(_Slab): 446 """ 447 Compute average I(Qx) for a region of interest 448 """ 449 450 def __call__(self, data2D): 451 """ 452 Compute average I(Qx) for a region of interest 453 :param data2D: Data2D object 454 :return: Data1D object 455 """ 456 return self._avg(data2D, 'x') 457 458 ################################################################################ 459 460 class Boxsum(object): 461 """ 462 Perform the sum of counts in a 2D region of interest. 463 """ 464 465 def __init__(self, x_min=0.0, x_max=0.0, y_min=0.0, y_max=0.0): 466 # Minimum Qx value [A-1] 467 self.x_min = x_min 468 # Maximum Qx value [A-1] 469 self.x_max = x_max 470 # Minimum Qy value [A-1] 471 self.y_min = y_min 472 # Maximum Qy value [A-1] 473 self.y_max = y_max 474 475 def __call__(self, data2D): 476 """ 477 Perform the sum in the region of interest 478 479 :param data2D: Data2D object 480 :return: number of counts, error on number of counts, 481 number of points summed 482 """ 483 y, err_y, y_counts = self._sum(data2D) 484 485 # Average the sums 486 counts = 0 if y_counts == 0 else y 487 error = 0 if y_counts == 0 else math.sqrt(err_y) 488 489 # Added y_counts to return, SMK & PDB, 04/03/2013 490 return counts, error, y_counts 491 492 def _sum(self, data2D): 493 """ 494 Perform the sum in the region of interest 495 496 :param data2D: Data2D object 497 :return: number of counts, 498 error on number of counts, number of entries summed 499 """ 500 if len(data2D.detector) > 1: 501 msg = "Circular averaging: invalid number " 502 msg += "of detectors: %g" % len(data2D.detector) 503 raise RuntimeError(msg) 504 # Get data 505 data = data2D.data[np.isfinite(data2D.data)] 506 err_data = data2D.err_data[np.isfinite(data2D.data)] 507 qx_data = data2D.qx_data[np.isfinite(data2D.data)] 508 qy_data = data2D.qy_data[np.isfinite(data2D.data)] 509 510 y = 0.0 511 err_y = 0.0 512 y_counts = 0.0 513 514 # Average pixelsize in q space 515 for npts in range(len(data)): 516 # default frac 517 frac_x = 0 518 frac_y = 0 519 520 # get min and max at each points 521 qx = qx_data[npts] 522 qy = qy_data[npts] 523 524 # get the ROI 525 if self.x_min <= qx and self.x_max > qx: 526 frac_x = 1 527 if self.y_min <= qy and self.y_max > qy: 528 frac_y = 1 529 # Find the fraction along each directions 530 frac = frac_x * frac_y 531 if frac == 0: 532 continue 533 y += frac * data[npts] 534 if err_data is None or err_data[npts] == 0.0: 535 if data[npts] < 0: 536 data[npts] = -data[npts] 537 err_y += frac * frac * data[npts] 538 else: 539 err_y += frac * frac * err_data[npts] * err_data[npts] 540 y_counts += frac 541 return y, err_y, y_counts 542 543 544 class Boxavg(Boxsum): 545 """ 546 Perform the average of counts in a 2D region of interest. 547 """ 548 549 def __init__(self, x_min=0.0, x_max=0.0, y_min=0.0, y_max=0.0): 550 super(Boxavg, self).__init__(x_min=x_min, x_max=x_max, 551 y_min=y_min, y_max=y_max) 552 553 def __call__(self, data2D): 554 """ 555 Perform the sum in the region of interest 556 557 :param data2D: Data2D object 558 :return: average counts, error on average counts 559 560 """ 561 y, err_y, y_counts = self._sum(data2D) 562 563 # Average the sums 564 counts = 0 if y_counts == 0 else y / y_counts 565 error = 0 if y_counts == 0 else math.sqrt(err_y) / y_counts 566 567 return counts, error 568 569 ################################################################################ 570 571 class CircularAverage(object): 572 """ 573 Perform circular averaging on 2D data 574 575 The data returned is the distribution of counts 576 as a function of Q 577 """ 578 579 def __init__(self, r_min=0.0, r_max=0.0, bin_width=0.0005): 580 # Minimum radius included in the average [A-1] 581 self.r_min = r_min 582 # Maximum radius included in the average [A-1] 583 self.r_max = r_max 584 # Bin width (step size) [A-1] 585 self.bin_width = bin_width 586 587 def __call__(self, data2D, ismask=False): 588 """ 589 Perform circular averaging on the data 590 591 :param data2D: Data2D object 592 :return: Data1D object 593 """ 594 # Get data W/ finite values 595 data = data2D.data[np.isfinite(data2D.data)] 596 q_data = data2D.q_data[np.isfinite(data2D.data)] 597 err_data = data2D.err_data[np.isfinite(data2D.data)] 598 mask_data = data2D.mask[np.isfinite(data2D.data)] 599 600 dq_data = None 601 if data2D.dqx_data is not None and data2D.dqy_data is not None: 602 dq_data = get_dq_data(data2D) 603 604 #q_data_max = np.max(q_data) 605 if len(data2D.q_data) is None: 606 msg = "Circular averaging: invalid q_data: %g" % data2D.q_data 607 raise RuntimeError(msg) 608 609 # Build array of Q intervals 610 nbins = int(math.ceil((self.r_max - self.r_min) / self.bin_width)) 611 612 x = np.zeros(nbins) 613 y = np.zeros(nbins) 614 err_y = np.zeros(nbins) 615 err_x = np.zeros(nbins) 616 y_counts = np.zeros(nbins) 617 618 for npt in range(len(data)): 619 620 if ismask and not mask_data[npt]: 621 continue 622 623 frac = 0 624 625 # q-value at the pixel (j,i) 626 q_value = q_data[npt] 627 data_n = data[npt] 628 629 # No need to calculate the frac when all data are within range 630 if self.r_min >= self.r_max: 631 raise ValueError("Limit Error: min > max") 632 633 if self.r_min <= q_value and q_value <= self.r_max: 634 frac = 1 635 if frac == 0: 636 continue 637 i_q = int(math.floor((q_value - self.r_min) / self.bin_width)) 638 639 # Take care of the edge case at phi = 2pi. 640 if i_q == nbins: 641 i_q = nbins - 1 642 y[i_q] += frac * data_n 643 # Take dqs from data to get the q_average 644 x[i_q] += frac * q_value 645 if err_data is None or err_data[npt] == 0.0: 646 if data_n < 0: 647 data_n = -data_n 648 err_y[i_q] += frac * frac * data_n 649 else: 650 err_y[i_q] += frac * frac * err_data[npt] * err_data[npt] 651 if dq_data is not None: 652 # To be consistent with dq calculation in 1d reduction, 653 # we need just the averages (not quadratures) because 654 # it should not depend on the number of the q points 655 # in the qr bins. 656 err_x[i_q] += frac * dq_data[npt] 657 else: 658 err_x = None 659 y_counts[i_q] += frac 660 661 # Average the sums 662 for n in range(nbins): 663 if err_y[n] < 0: 664 err_y[n] = -err_y[n] 665 err_y[n] = math.sqrt(err_y[n]) 666 # if err_x is not None: 667 # err_x[n] = math.sqrt(err_x[n]) 668 669 err_y = err_y / y_counts 670 err_y[err_y == 0] = np.average(err_y) 671 y = y / y_counts 672 x = x / y_counts 673 idx = (np.isfinite(y)) & (np.isfinite(x)) 674 675 if err_x is not None: 676 d_x = err_x[idx] / y_counts[idx] 677 else: 678 d_x = None 679 680 if not idx.any(): 681 msg = "Average Error: No points inside ROI to average..." 682 raise ValueError(msg) 683 684 return Data1D(x=x[idx], y=y[idx], dy=err_y[idx], dx=d_x) 685 686 ################################################################################ 687 688 class Ring(object): 689 """ 690 Defines a ring on a 2D data set. 691 The ring is defined by r_min, r_max, and 692 the position of the center of the ring. 693 694 The data returned is the distribution of counts 695 around the ring as a function of phi. 696 697 Phi_min and phi_max should be defined between 0 and 2*pi 698 in anti-clockwise starting from the x- axis on the left-hand side 699 """ 700 # Todo: remove center. 701 702 def __init__(self, r_min=0, r_max=0, center_x=0, center_y=0, nbins=36): 703 # Minimum radius 704 self.r_min = r_min 705 # Maximum radius 706 self.r_max = r_max 707 # Center of the ring in x 708 self.center_x = center_x 709 # Center of the ring in y 710 self.center_y = center_y 711 # Number of angular bins 712 self.nbins_phi = nbins 713 714 def __call__(self, data2D): 715 """ 716 Apply the ring to the data set. 717 Returns the angular distribution for a given q range 718 719 :param data2D: Data2D object 720 721 :return: Data1D object 722 """ 723 if data2D.__class__.__name__ not in ["Data2D", "plottable_2D"]: 724 raise RuntimeError("Ring averaging only take plottable_2D objects") 725 726 Pi = math.pi 727 728 # Get data 729 data = data2D.data[np.isfinite(data2D.data)] 730 q_data = data2D.q_data[np.isfinite(data2D.data)] 731 err_data = data2D.err_data[np.isfinite(data2D.data)] 732 qx_data = data2D.qx_data[np.isfinite(data2D.data)] 733 qy_data = data2D.qy_data[np.isfinite(data2D.data)] 734 735 # Set space for 1d outputs 736 phi_bins = np.zeros(self.nbins_phi) 737 phi_counts = np.zeros(self.nbins_phi) 738 phi_values = np.zeros(self.nbins_phi) 739 phi_err = np.zeros(self.nbins_phi) 740 741 # Shift to apply to calculated phi values in order 742 # to center first bin at zero 743 phi_shift = Pi / self.nbins_phi 744 745 for npt in range(len(data)): 746 frac = 0 747 # q-value at the point (npt) 748 q_value = q_data[npt] 749 data_n = data[npt] 750 751 # phi-value at the point (npt) 752 phi_value = math.atan2(qy_data[npt], qx_data[npt]) + Pi 753 754 if self.r_min <= q_value and q_value <= self.r_max: 755 frac = 1 756 if frac == 0: 757 continue 758 # binning 759 i_phi = int(math.floor((self.nbins_phi) * 760 (phi_value + phi_shift) / (2 * Pi))) 761 762 # Take care of the edge case at phi = 2pi. 763 if i_phi >= self.nbins_phi: 764 i_phi = 0 765 phi_bins[i_phi] += frac * data[npt] 766 767 if err_data is None or err_data[npt] == 0.0: 768 if data_n < 0: 769 data_n = -data_n 770 phi_err[i_phi] += frac * frac * math.fabs(data_n) 771 else: 772 phi_err[i_phi] += frac * frac * err_data[npt] * err_data[npt] 773 phi_counts[i_phi] += frac 774 775 for i in range(self.nbins_phi): 776 phi_bins[i] = phi_bins[i] / phi_counts[i] 777 phi_err[i] = math.sqrt(phi_err[i]) / phi_counts[i] 778 phi_values[i] = 2.0 * math.pi / self.nbins_phi * (1.0 * i) 779 780 idx = (np.isfinite(phi_bins)) 781 782 if not idx.any(): 783 msg = "Average Error: No points inside ROI to average..." 784 raise ValueError(msg) 785 # elif len(phi_bins[idx])!= self.nbins_phi: 786 # print "resulted",self.nbins_phi- len(phi_bins[idx]) 787 #,"empty bin(s) due to tight binning..." 788 return Data1D(x=phi_values[idx], y=phi_bins[idx], dy=phi_err[idx]) 789 790 ################################################################################ 737 791 738 792 class _Sector(object): … … 748 802 starting from the x- axis on the left-hand side 749 803 """ 750 def __init__(self, r_min, r_max, phi_min=0, phi_max=2 * math.pi, nbins=20): 804 805 def __init__(self, r_min, r_max, phi_min=0, phi_max=2 * math.pi, nbins=20, base = None): 751 806 self.r_min = r_min 752 807 self.r_max = r_max … … 754 809 self.phi_max = phi_max 755 810 self.nbins = nbins 811 self.base = base 756 812 757 813 def _agv(self, data2D, run='phi'): … … 765 821 """ 766 822 if data2D.__class__.__name__ not in ["Data2D", "plottable_2D"]: 767 raise RuntimeError, "Ring averaging only take plottable_2D objects" 768 Pi = math.pi 823 raise RuntimeError("Ring averaging only take plottable_2D objects") 769 824 770 825 # Get the all data & info 771 data = data2D.data[numpy.isfinite(data2D.data)] 772 q_data = data2D.q_data[numpy.isfinite(data2D.data)] 773 err_data = data2D.err_data[numpy.isfinite(data2D.data)] 774 qx_data = data2D.qx_data[numpy.isfinite(data2D.data)] 775 qy_data = data2D.qy_data[numpy.isfinite(data2D.data)] 826 data = data2D.data[np.isfinite(data2D.data)] 827 q_data = data2D.q_data[np.isfinite(data2D.data)] 828 err_data = data2D.err_data[np.isfinite(data2D.data)] 829 qx_data = data2D.qx_data[np.isfinite(data2D.data)] 830 qy_data = data2D.qy_data[np.isfinite(data2D.data)] 831 776 832 dq_data = None 777 778 # Get the dq for resolution averaging 779 if data2D.dqx_data != None and data2D.dqy_data != None: 780 # The pinholes and det. pix contribution present 781 # in both direction of the 2D which must be subtracted when 782 # converting to 1D: dq_overlap should calculated ideally at 783 # q = 0. 784 # Extrapolate dqy(perp) at q = 0 785 z_max = max(data2D.q_data) 786 z_min = min(data2D.q_data) 787 x_max = data2D.dqx_data[data2D.q_data[z_max]] 788 x_min = data2D.dqx_data[data2D.q_data[z_min]] 789 y_max = data2D.dqy_data[data2D.q_data[z_max]] 790 y_min = data2D.dqy_data[data2D.q_data[z_min]] 791 # Find qdx at q = 0 792 dq_overlap_x = (x_min * z_max - x_max * z_min) / (z_max - z_min) 793 # when extrapolation goes wrong 794 if dq_overlap_x > min(data2D.dqx_data): 795 dq_overlap_x = min(data2D.dqx_data) 796 dq_overlap_x *= dq_overlap_x 797 # Find qdx at q = 0 798 dq_overlap_y = (y_min * z_max - y_max * z_min) / (z_max - z_min) 799 # when extrapolation goes wrong 800 if dq_overlap_y > min(data2D.dqy_data): 801 dq_overlap_y = min(data2D.dqy_data) 802 # get dq at q=0. 803 dq_overlap_y *= dq_overlap_y 804 805 dq_overlap = numpy.sqrt((dq_overlap_x + dq_overlap_y) / 2.0) 806 if dq_overlap < 0: 807 dq_overlap = y_min 808 dqx_data = data2D.dqx_data[numpy.isfinite(data2D.data)] 809 dqy_data = data2D.dqy_data[numpy.isfinite(data2D.data)] - dq_overlap 810 # def; dqx_data = dq_r dqy_data = dq_phi 811 # Convert dq 2D to 1D here 812 dqx = dqx_data * dqx_data 813 dqy = dqy_data * dqy_data 814 dq_data = numpy.add(dqx, dqy) 815 dq_data = numpy.sqrt(dq_data) 816 817 #set space for 1d outputs 818 x = numpy.zeros(self.nbins) 819 y = numpy.zeros(self.nbins) 820 y_err = numpy.zeros(self.nbins) 821 x_err = numpy.zeros(self.nbins) 822 y_counts = numpy.zeros(self.nbins) 833 if data2D.dqx_data is not None and data2D.dqy_data is not None: 834 dq_data = get_dq_data(data2D) 835 836 # set space for 1d outputs 837 x = np.zeros(self.nbins) 838 y = np.zeros(self.nbins) 839 y_err = np.zeros(self.nbins) 840 x_err = np.zeros(self.nbins) 841 y_counts = np.zeros(self.nbins) # Cycle counts (for the mean) 823 842 824 843 # Get the min and max into the region: 0 <= phi < 2Pi 825 844 phi_min = flip_phi(self.phi_min) 826 845 phi_max = flip_phi(self.phi_max) 827 846 847 # binning object 848 if run.lower() == 'phi': 849 binning = Binning(self.phi_min, self.phi_max, self.nbins, self.base) 850 else: 851 binning = Binning(self.r_min, self.r_max, self.nbins, self.base) 852 828 853 for n in range(len(data)): 829 frac = 0830 854 831 855 # q-value at the pixel (j,i) … … 837 861 838 862 # phi-value of the pixel (j,i) 839 phi_value = math.atan2(qy_data[n], qx_data[n]) + Pi 840 841 ## No need to calculate the frac when all data are within range 842 if self.r_min <= q_value and q_value <= self.r_max: 843 frac = 1 844 if frac == 0: 863 phi_value = math.atan2(qy_data[n], qx_data[n]) + math.pi 864 865 # No need to calculate: data outside of the radius 866 if self.r_min > q_value or q_value > self.r_max: 845 867 continue 846 #In case of two ROIs (symmetric major and minor regions)(for 'q2') 868 869 # In case of two ROIs (symmetric major and minor regions)(for 'q2') 847 870 if run.lower() == 'q2': 848 # #For minor sector wing871 # For minor sector wing 849 872 # Calculate the minor wing phis 850 phi_min_minor = flip_phi(phi_min - Pi)851 phi_max_minor = flip_phi(phi_max - Pi)873 phi_min_minor = flip_phi(phi_min - math.pi) 874 phi_max_minor = flip_phi(phi_max - math.pi) 852 875 # Check if phis of the minor ring is within 0 to 2pi 853 876 if phi_min_minor > phi_max_minor: 854 is_in = (phi_value > phi_min_minor or \855 877 is_in = (phi_value > phi_min_minor or 878 phi_value < phi_max_minor) 856 879 else: 857 is_in = (phi_value > phi_min_minor and \858 859 860 # For all cases(i.e.,for 'q', 'q2', and 'phi')861 # Find pixels within ROI880 is_in = (phi_value > phi_min_minor and 881 phi_value < phi_max_minor) 882 883 # For all cases(i.e.,for 'q', 'q2', and 'phi') 884 # Find pixels within ROI 862 885 if phi_min > phi_max: 863 is_in = is_in or (phi_value > phi_min or \864 886 is_in = is_in or (phi_value > phi_min or 887 phi_value < phi_max) 865 888 else: 866 is_in = is_in or (phi_value >= phi_min and \ 867 phi_value < phi_max) 868 889 is_in = is_in or (phi_value >= phi_min and 890 phi_value < phi_max) 891 892 # data oustide of the phi range 869 893 if not is_in: 870 frac = 0871 if frac == 0:872 894 continue 873 # Check which type of averaging we need 895 896 # Get the binning index 874 897 if run.lower() == 'phi': 875 temp_x = (self.nbins) * (phi_value - self.phi_min) 876 temp_y = (self.phi_max - self.phi_min) 877 i_bin = int(math.floor(temp_x / temp_y)) 898 i_bin = binning.get_bin_index(phi_value) 878 899 else: 879 temp_x = (self.nbins) * (q_value - self.r_min) 880 temp_y = (self.r_max - self.r_min) 881 i_bin = int(math.floor(temp_x / temp_y)) 900 i_bin = binning.get_bin_index(q_value) 882 901 883 902 # Take care of the edge case at phi = 2pi. … … 885 904 i_bin = self.nbins - 1 886 905 887 # #Get the total y888 y[i_bin] += frac *data_n889 x[i_bin] += frac *q_value890 if err_data[n] ==None or err_data[n] == 0.0:906 # Get the total y 907 y[i_bin] += data_n 908 x[i_bin] += q_value 909 if err_data[n] is None or err_data[n] == 0.0: 891 910 if data_n < 0: 892 911 data_n = -data_n 893 y_err[i_bin] += frac * frac *data_n912 y_err[i_bin] += data_n 894 913 else: 895 y_err[i_bin] += frac * frac * err_data[n] * err_data[n]896 897 if dq_data !=None:914 y_err[i_bin] += err_data[n]**2 915 916 if dq_data is not None: 898 917 # To be consistent with dq calculation in 1d reduction, 899 918 # we need just the averages (not quadratures) because 900 919 # it should not depend on the number of the q points 901 920 # in the qr bins. 902 x_err[i_bin] += frac *dq_data[n]921 x_err[i_bin] += dq_data[n] 903 922 else: 904 923 x_err = None 905 y_counts[i_bin] += frac924 y_counts[i_bin] += 1 906 925 907 926 # Organize the results … … 923 942 #x[i] = math.sqrt((r_inner * r_inner + r_outer * r_outer) / 2) 924 943 x[i] = x[i] / y_counts[i] 925 y_err[y_err == 0] = n umpy.average(y_err)926 idx = (n umpy.isfinite(y) & numpy.isfinite(y_err))927 if x_err !=None:944 y_err[y_err == 0] = np.average(y_err) 945 idx = (np.isfinite(y) & np.isfinite(y_err)) 946 if x_err is not None: 928 947 d_x = x_err[idx] / y_counts[idx] 929 948 else: … … 931 950 if not idx.any(): 932 951 msg = "Average Error: No points inside sector of ROI to average..." 933 raise ValueError , msg934 # elif len(y[idx])!= self.nbins:952 raise ValueError(msg) 953 # elif len(y[idx])!= self.nbins: 935 954 # print "resulted",self.nbins- len(y[idx]), 936 955 #"empty bin(s) due to tight binning..." … … 946 965 The number of bin in phi also has to be defined. 947 966 """ 967 948 968 def __call__(self, data2D): 949 969 """ … … 965 985 The number of bin in Q also has to be defined. 966 986 """ 987 967 988 def __call__(self, data2D): 968 989 """ … … 975 996 return self._agv(data2D, 'q2') 976 997 998 ################################################################################ 977 999 978 1000 class Ringcut(object): … … 987 1009 in anti-clockwise starting from the x- axis on the left-hand side 988 1010 """ 1011 989 1012 def __init__(self, r_min=0, r_max=0, center_x=0, center_y=0): 990 1013 # Minimum radius … … 1007 1030 """ 1008 1031 if data2D.__class__.__name__ not in ["Data2D", "plottable_2D"]: 1009 raise RuntimeError , "Ring cut only take plottable_2D objects"1032 raise RuntimeError("Ring cut only take plottable_2D objects") 1010 1033 1011 1034 # Get data 1012 1035 qx_data = data2D.qx_data 1013 1036 qy_data = data2D.qy_data 1014 q_data = n umpy.sqrt(qx_data * qx_data + qy_data * qy_data)1037 q_data = np.sqrt(qx_data * qx_data + qy_data * qy_data) 1015 1038 1016 1039 # check whether or not the data point is inside ROI … … 1018 1041 return out 1019 1042 1043 ################################################################################ 1020 1044 1021 1045 class Boxcut(object): … … 1023 1047 Find a rectangular 2D region of interest. 1024 1048 """ 1049 1025 1050 def __init__(self, x_min=0.0, x_max=0.0, y_min=0.0, y_max=0.0): 1026 1051 # Minimum Qx value [A-1] … … 1055 1080 """ 1056 1081 if data2D.__class__.__name__ not in ["Data2D", "plottable_2D"]: 1057 raise RuntimeError , "Boxcut take only plottable_2D objects"1082 raise RuntimeError("Boxcut take only plottable_2D objects") 1058 1083 # Get qx_ and qy_data 1059 1084 qx_data = data2D.qx_data … … 1066 1091 return outx & outy 1067 1092 1093 ################################################################################ 1068 1094 1069 1095 class Sectorcut(object): … … 1077 1103 and (phi_max-phi_min) should not be larger than pi 1078 1104 """ 1105 1079 1106 def __init__(self, phi_min=0, phi_max=math.pi): 1080 1107 self.phi_min = phi_min … … 1106 1133 """ 1107 1134 if data2D.__class__.__name__ not in ["Data2D", "plottable_2D"]: 1108 raise RuntimeError , "Sectorcut take only plottable_2D objects"1135 raise RuntimeError("Sectorcut take only plottable_2D objects") 1109 1136 Pi = math.pi 1110 1137 # Get data … … 1113 1140 1114 1141 # get phi from data 1115 phi_data = n umpy.arctan2(qy_data, qx_data)1142 phi_data = np.arctan2(qy_data, qx_data) 1116 1143 1117 1144 # Get the min and max into the region: -pi <= phi < Pi … … 1120 1147 # check for major sector 1121 1148 if phi_min_major > phi_max_major: 1122 out_major = (phi_min_major <= phi_data) + (phi_max_major > phi_data) 1149 out_major = (phi_min_major <= phi_data) + \ 1150 (phi_max_major > phi_data) 1123 1151 else: 1124 out_major = (phi_min_major <= phi_data) & (phi_max_major > phi_data) 1152 out_major = (phi_min_major <= phi_data) & ( 1153 phi_max_major > phi_data) 1125 1154 1126 1155 # minor sector … … 1132 1161 if phi_min_minor > phi_max_minor: 1133 1162 out_minor = (phi_min_minor <= phi_data) + \ 1134 1163 (phi_max_minor >= phi_data) 1135 1164 else: 1136 1165 out_minor = (phi_min_minor <= phi_data) & \ 1137 1166 (phi_max_minor >= phi_data) 1138 1167 out = out_major + out_minor 1139 1168
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