inversion_state.py @ c958e30

ESS_GUIESS_GUI_DocsESS_GUI_batch_fittingESS_GUI_bumps_abstractionESS_GUI_iss1116ESS_GUI_iss879ESS_GUI_iss959ESS_GUI_openclESS_GUI_orderingESS_GUI_sync_sascalccostrafo411magnetic_scattrelease-4.1.1release-4.1.2release-4.2.2release_4.0.1ticket-1009ticket-1094-headlessticket-1242-2d-resolutionticket-1243ticket-1249ticket885unittest-saveload

Last change on this file since c958e30 was a3149c5, checked in by Gervaise Alina <gervyh@…>, 14 years ago
working on guiframe
Property mode set to `100644`
File size: 19.6 KB

Rev	Line
[6f1f129]	1
[7116b6e0]	2	################################################################################
	3	#This software was developed by the University of Tennessee as part of the
	4	#Distributed Data Analysis of Neutron Scattering Experiments (DANSE)
	5	#project funded by the US National Science Foundation.
	6	#
	7	#See the license text in license.txt
	8	#
	9	#copyright 2009, University of Tennessee
	10	################################################################################
	11
[6f1f129]	12
[3e41f43]	13	import time
	14	import os
	15	import sys
[91128648]	16	import logging
[b1f7ec6]	17	from xml.dom.minidom import parse
	18	from lxml import etree
[a07e72f]	19	from sans.guiframe.dataFitting import Data1D
[91128648]	20	from DataLoader.readers.cansas_reader import Reader as CansasReader
[b1f7ec6]	21	from DataLoader.readers.cansas_reader import get_content
[91128648]	22
	23	PRNODE_NAME = 'pr_inversion'
[b1f7ec6]	24	CANSAS_NS = "cansas1d/1.0"
[6f1f129]	25
[80d2872]	26	# Translation of names between stored and object data
[6f1f129]	27	## List of P(r) inversion inputs
[7116b6e0]	28	in_list = [["nterms", "nfunc"],
[80d2872]	29	["d_max", "d_max"],
	30	["alpha", "alpha"],
	31	["slit_width", "width"],
	32	["slit_height", "height"],
	33	["qmin", "qmin"],
	34	["qmax", "qmax"]]
[6f1f129]	35
	36	## List of P(r) inversion outputs
[7116b6e0]	37	out_list = [["elapsed", "elapsed"],
[80d2872]	38	["rg", "rg"],
	39	["iq0", "iq0"],
	40	["bck", "bck"],
	41	["chi2", "chi2"],
	42	["osc", "osc"],
	43	["pos", "pos"],
	44	["pos_err", "pos_err"],
	45	["alpha_estimate", "alpha_estimate"],
	46	["nterms_estimate", "nterms_estimate"]]
[6f1f129]	47
	48	class InversionState(object):
	49	"""
[7116b6e0]	50	Class to hold the state information of the InversionControl panel.
[6f1f129]	51	"""
	52	def __init__(self):
	53	"""
[7116b6e0]	54	Default values
[6f1f129]	55	"""
	56	# Input
	57	self.file = None
	58	self.estimate_bck = False
	59	self.timestamp = time.time()
	60
	61	# Inversion parameters
	62	self.nfunc = None
	63	self.d_max = None
	64	self.alpha = None
	65
	66	# Slit parameters
	67	self.height = None
	68	self.width = None
	69
	70	# Q range
	71	self.qmin = None
	72	self.qmax = None
	73
	74	# Outputs
	75	self.elapsed = None
	76	self.rg = None
	77	self.iq0 = None
	78	self.bck = None
	79	self.chi2 = None
	80	self.osc = None
	81	self.pos = None
	82	self.pos_err = None
	83
	84	# Estimates
	85	self.alpha_estimate = None
	86	self.nterms_estimate = None
	87
	88	# Data
	89	self.q = None
	90	self.iq_obs = None
	91	self.iq_calc = None
[410aad8]	92
	93	# Coefficients
	94	self.coefficients = None
	95	self.covariance = None
[6f1f129]	96
	97	def __str__(self):
	98	"""
[7116b6e0]	99	Pretty print
	100
	101	:return: string representing the state
	102
[6f1f129]	103	"""
	104	state = "File: %s\n" % self.file
	105	state += "Timestamp: %s\n" % self.timestamp
	106	state += "Estimate bck: %s\n" % str(self.estimate_bck)
	107	state += "No. terms: %s\n" % str(self.nfunc)
	108	state += "D_max: %s\n" % str(self.d_max)
	109	state += "Alpha: %s\n" % str(self.alpha)
	110
	111	state += "Slit height: %s\n" % str(self.height)
	112	state += "Slit width: %s\n" % str(self.width)
	113
	114	state += "Qmin: %s\n" % str(self.qmin)
	115	state += "Qmax: %s\n" % str(self.qmax)
	116
	117	state += "\nEstimates:\n"
	118	state += " Alpha: %s\n" % str(self.alpha_estimate)
	119	state += " Nterms: %s\n" % str(self.nterms_estimate)
	120
	121	state += "\nOutputs:\n"
	122	state += " Elapsed: %s\n" % str(self.elapsed)
	123	state += " Rg: %s\n" % str(self.rg)
	124	state += " I(q=0): %s\n" % str(self.iq0)
	125	state += " Bck: %s\n" % str(self.bck)
	126	state += " Chi^2: %s\n" % str(self.chi2)
	127	state += " Oscillation:%s\n" % str(self.osc)
	128	state += " Positive: %s\n" % str(self.pos)
	129	state += " 1-sigma pos:%s\n" % str(self.pos_err)
	130
	131	return state
	132
[91128648]	133	def toXML(self, file="pr_state.prv", doc=None, entry_node=None):
[6f1f129]	134	"""
[7116b6e0]	135	Writes the state of the InversionControl panel to file, as XML.
	136
	137	Compatible with standalone writing, or appending to an
	138	already existing XML document. In that case, the XML document
[3e41f43]	139	is required. An optional entry node in the XML document
	140	may also be given.
[7116b6e0]	141
	142	:param file: file to write to
	143	:param doc: XML document object [optional]
	144	:param entry_node: XML node within the XML document at which
	145	we will append the data [optional]
	146
[6f1f129]	147	"""
	148	from xml.dom.minidom import getDOMImplementation
	149
[91128648]	150	# Check whether we have to write a standalone XML file
	151	if doc is None:
	152	impl = getDOMImplementation()
[6f1f129]	153
[91128648]	154	doc_type = impl.createDocumentType(PRNODE_NAME, "1.0", "1.0")
[6f1f129]	155
[91128648]	156	newdoc = impl.createDocument(None, PRNODE_NAME, doc_type)
	157	top_element = newdoc.documentElement
	158	else:
	159	# We are appending to an existing document
	160	newdoc = doc
	161	top_element = newdoc.createElement(PRNODE_NAME)
	162	if entry_node is None:
	163	newdoc.documentElement.appendChild(top_element)
	164	else:
	165	entry_node.appendChild(top_element)
	166
[6f1f129]	167	attr = newdoc.createAttribute("version")
	168	attr.nodeValue = '1.0'
	169	top_element.setAttributeNode(attr)
	170
	171	# File name
[410aad8]	172	element = newdoc.createElement("filename")
[91128648]	173	if self.file is not None:
	174	element.appendChild(newdoc.createTextNode(str(self.file)))
[410aad8]	175	else:
	176	element.appendChild(newdoc.createTextNode(str(file)))
	177	top_element.appendChild(element)
[6f1f129]	178
	179	element = newdoc.createElement("timestamp")
	180	element.appendChild(newdoc.createTextNode(time.ctime(self.timestamp)))
	181	attr = newdoc.createAttribute("epoch")
	182	attr.nodeValue = str(self.timestamp)
	183	element.setAttributeNode(attr)
	184	top_element.appendChild(element)
	185
	186	# Inputs
	187	inputs = newdoc.createElement("inputs")
	188	top_element.appendChild(inputs)
	189
	190	for item in in_list:
	191	element = newdoc.createElement(item[0])
[3e41f43]	192	cmd = "element.appendChild(newdoc.createTextNode(str(self.%s)))"
	193	exec cmd % item[1]
[6f1f129]	194	inputs.appendChild(element)
	195
	196	# Outputs
	197	outputs = newdoc.createElement("outputs")
	198	top_element.appendChild(outputs)
	199
	200	for item in out_list:
	201	element = newdoc.createElement(item[0])
[3e41f43]	202	cmd = "element.appendChild(newdoc.createTextNode(str(self.%s)))"
	203	exec cmd % item[1]
[6f1f129]	204	outputs.appendChild(element)
	205
[410aad8]	206	# Save output coefficients and its covariance matrix
	207	element = newdoc.createElement("coefficients")
	208	element.appendChild(newdoc.createTextNode(str(self.coefficients)))
	209	outputs.appendChild(element)
	210	element = newdoc.createElement("covariance")
	211	element.appendChild(newdoc.createTextNode(str(self.covariance)))
	212	outputs.appendChild(element)
	213
[6f1f129]	214	# Save the file
[91128648]	215	if doc is None:
	216	fd = open(file, 'w')
	217	fd.write(newdoc.toprettyxml())
	218	fd.close()
	219	return None
	220	else:
	221	return newdoc.toprettyxml()
[6f1f129]	222
[91128648]	223	def fromXML(self, file=None, node=None):
[6f1f129]	224	"""
[7116b6e0]	225	Load a P(r) inversion state from a file
	226
	227	:param file: .prv file
	228	:param node: node of a XML document to read from
	229
[6f1f129]	230	"""
[91128648]	231	if file is not None:
[3e41f43]	232	msg = "InversionState no longer supports non-CanSAS"
	233	msg += " format for P(r) files"
	234	raise RuntimeError, msg
[91128648]	235
[3e41f43]	236	if node.get('version') and node.get('version') == '1.0':
[b1f7ec6]	237
	238	# Get file name
	239	entry = get_content('ns:filename', node)
	240	if entry is not None:
	241	self.file = entry.text.strip()
	242
	243	# Get time stamp
	244	entry = get_content('ns:timestamp', node)
	245	if entry is not None and entry.get('epoch'):
	246	try:
	247	self.timestamp = float(entry.get('epoch'))
	248	except:
[3e41f43]	249	msg = "InversionState.fromXML: Could not read "
	250	msg += "timestamp\n %s" % sys.exc_value
	251	logging.error(msg)
[b1f7ec6]	252
	253	# Parse inversion inputs
	254	entry = get_content('ns:inputs', node)
	255	if entry is not None:
	256	for item in in_list:
	257	input_field = get_content('ns:%s' % item[0], entry)
	258	if input_field is not None:
	259	try:
[3e41f43]	260	cmd = 'self.%s = float(input_field.text.strip())'
	261	exec cmd % item[1]
[b1f7ec6]	262	except:
[80d2872]	263	exec 'self.%s = None' % item[1]
[b1f7ec6]	264	input_field = get_content('ns:estimate_bck', entry)
	265	if input_field is not None:
	266	try:
	267	self.estimate_bck = input_field.text.strip()=='True'
	268	except:
	269	self.estimate_bck = False
[6f1f129]	270
[b1f7ec6]	271	# Parse inversion outputs
	272	entry = get_content('ns:outputs', node)
	273	if entry is not None:
	274	# Output parameters (scalars)
	275	for item in out_list:
	276	input_field = get_content('ns:%s' % item[0], entry)
	277	if input_field is not None:
	278	try:
[3e41f43]	279	cmd = 'self.%s = float(input_field.text.strip())'
	280	exec cmd % item[1]
[b1f7ec6]	281	except:
[80d2872]	282	exec 'self.%s = None' % item[1]
[b1f7ec6]	283
	284	# Look for coefficients
	285	# Format is [value, value, value, value]
	286	coeff = get_content('ns:coefficients', entry)
	287	if coeff is not None:
	288	# Remove brackets
	289	c_values = coeff.text.strip().replace('[','')
	290	c_values = c_values.replace(']','')
	291	toks = c_values.split()
	292	self.coefficients = []
	293	for c in toks:
	294	try:
	295	self.coefficients.append(float(c))
	296	except:
	297	# Bad data, skip. We will count the number of
	298	# coefficients at the very end and deal with
	299	# inconsistencies then.
	300	pass
	301	# Sanity check
	302	if not len(self.coefficients) == self.nfunc:
[3e41f43]	303	# Inconsistent number of coefficients.
	304	# Don't keep the data.
	305	err_msg = "InversionState.fromXML: inconsistant "
	306	err_msg += "number of coefficients: "
	307	err_msg += "%d %d" % (len(self.coefficients),
	308	self.nfunc)
[b1f7ec6]	309	logging.error(err_msg)
	310	self.coefficients = None
	311
	312	# Look for covariance matrix
	313	# Format is [ [value, value], [value, value] ]
	314	coeff = get_content('ns:covariance', entry)
	315	if coeff is not None:
	316	# Parse rows
	317	rows = coeff.text.strip().split('[')
	318	self.covariance = []
	319	for row in rows:
	320	row = row.strip()
	321	if len(row) == 0: continue
	322	# Remove end bracket
	323	row = row.replace(']','')
	324	c_values = row.split()
	325	cov_row = []
	326	for c in c_values:
	327	try:
	328	cov_row.append(float(c))
	329	except:
	330	# Bad data, skip. We will count the number of
	331	# coefficients at the very end and deal with
	332	# inconsistencies then.
	333	pass
	334	# Sanity check: check the number of entries in the row
	335	if len(cov_row) == self.nfunc:
	336	self.covariance.append(cov_row)
	337	# Sanity check: check the number of rows in the covariance
	338	# matrix
	339	if not len(self.covariance) == self.nfunc:
	340	# Inconsistent dimensions of the covariance matrix.
	341	# Don't keep the data.
[3e41f43]	342	err_msg = "InversionState.fromXML: "
	343	err_msg += "inconsistant dimensions of the "
	344	err_msg += " covariance matrix: "
[b1f7ec6]	345	err_msg += "%d %d" % (len(self.covariance), self.nfunc)
	346	logging.error(err_msg)
	347	self.covariance = None
	348
[91128648]	349	class Reader(CansasReader):
[6f1f129]	350	"""
[7116b6e0]	351	Class to load a .prv P(r) inversion file
[6f1f129]	352	"""
	353	## File type
	354	type_name = "P(r)"
	355
	356	## Wildcards
[b35d3d1]	357	type = ["P(r) files (.prv)\|.prv",
	358	"SANSView files (.svs)\|.svs"]
[6f1f129]	359	## List of allowed extensions
[3e41f43]	360	ext = ['.prv', '.PRV', '.svs', '.SVS']
[6f1f129]	361
[0d88a09]	362	def __init__(self, call_back, cansas=True):
[6f1f129]	363	"""
[7116b6e0]	364	Initialize the call-back method to be called
	365	after we load a file
	366
	367	:param call_back: call-back method
	368	:param cansas: True = files will be written/read in CanSAS format
	369	False = write CanSAS format
[91128648]	370
[6f1f129]	371	"""
[91128648]	372	## Call back method to be executed after a file is read
[6f1f129]	373	self.call_back = call_back
[91128648]	374	## CanSAS format flag
	375	self.cansas = cansas
[75fbd17]	376	self.state = None
[6f1f129]	377
	378	def read(self, path):
	379	"""
[7116b6e0]	380	Load a new P(r) inversion state from file
	381
	382	:param path: file path
	383
	384	:return: None
	385
[6f1f129]	386	"""
[91128648]	387	if self.cansas==True:
	388	return self._read_cansas(path)
	389	else:
	390	return self._read_standalone(path)
	391
	392	def _read_standalone(self, path):
	393	"""
[7116b6e0]	394	Load a new P(r) inversion state from file.
	395	The P(r) node is assumed to be the top element.
	396
	397	:param path: file path
	398
	399	:return: None
	400
[91128648]	401	"""
[6f1f129]	402	# Read the new state from file
	403	state = InversionState()
[91128648]	404	state.fromXML(file=path)
[6f1f129]	405
	406	# Call back to post the new state
[75fbd17]	407	self.state = state
	408	#self.call_back(state)
[6f1f129]	409	return None
[91128648]	410
	411	def _parse_prstate(self, entry):
	412	"""
[7116b6e0]	413	Read a p(r) inversion result from an XML node
	414
	415	:param entry: XML node to read from
	416
	417	:return: InversionState object
	418
[91128648]	419	"""
[b35d3d1]	420	state = None
[91128648]	421
	422	# Locate the P(r) node
	423	try:
[3e41f43]	424	nodes = entry.xpath('ns:%s' % PRNODE_NAME,
	425	namespaces={'ns': CANSAS_NS})
[b35d3d1]	426	if nodes !=[]:
	427	# Create an empty state
	428	state = InversionState()
	429	state.fromXML(node=nodes[0])
[91128648]	430	except:
[3e41f43]	431	msg = "XML document does not contain P(r) "
	432	msg += "information.\n %s" % sys.exc_value
	433	logging.info(msg)
[91128648]	434
	435	return state
	436
	437	def _read_cansas(self, path):
	438	"""
[7116b6e0]	439	Load data and P(r) information from a CanSAS XML file.
	440
	441	:param path: file path
	442
	443	:return: Data1D object if a single SASentry was found,
	444	or a list of Data1D objects if multiple entries were found,
	445	or None of nothing was found
	446
	447	:raise RuntimeError: when the file can't be opened
	448	:raise ValueError: when the length of the data vectors are inconsistent
	449
[91128648]	450	"""
	451	output = []
	452
	453	if os.path.isfile(path):
	454	basename = os.path.basename(path)
	455	root, extension = os.path.splitext(basename)
[410aad8]	456	#TODO: eventually remove the check for .xml once
	457	# the P(r) writer/reader is truly complete.
[3e41f43]	458	if extension.lower() in self.ext or extension.lower() == '.xml':
[91128648]	459
[b1f7ec6]	460	tree = etree.parse(path, parser=etree.ETCompatXMLParser())
[91128648]	461	# Check the format version number
[3e41f43]	462	# Specifying the namespace will take care of the file
	463	#format version
[b1f7ec6]	464	root = tree.getroot()
[91128648]	465
[3e41f43]	466	entry_list = root.xpath('/ns:SASroot/ns:SASentry',
	467	namespaces={'ns': CANSAS_NS})
[b1f7ec6]	468
[91128648]	469	for entry in entry_list:
	470	sas_entry = self._parse_entry(entry)
	471	prstate = self._parse_prstate(entry)
[b35d3d1]	472	#prstate could be None when .svs file is loaded
	473	#in this case, skip appending to output
	474	if prstate != None:
	475	sas_entry.meta_data['prstate'] = prstate
	476	sas_entry.filename = prstate.file
	477	output.append(sas_entry)
[91128648]	478	else:
	479	raise RuntimeError, "%s is not a file" % path
	480
	481	# Return output consistent with the loader's api
[3e41f43]	482	if len(output) == 0:
[91128648]	483	return None
[3e41f43]	484	elif len(output) == 1:
[410aad8]	485	# Call back to post the new state
[229da98]	486	self.call_back(output[0].meta_data['prstate'], datainfo = output[0])
	487	#self.state = output[0].meta_data['prstate']
[91128648]	488	return output[0]
	489	else:
	490	return output
	491
	492
	493	def write(self, filename, datainfo=None, prstate=None):
	494	"""
[7116b6e0]	495	Write the content of a Data1D as a CanSAS XML file
	496
	497	:param filename: name of the file to write
	498	:param datainfo: Data1D object
	499	:param prstate: InversionState object
	500
[91128648]	501	"""
	502	# Sanity check
	503	if self.cansas == True:
[b35d3d1]	504	doc =self.write_toXML(datainfo, prstate)
[91128648]	505	# Write the XML document
	506	fd = open(filename, 'w')
	507	fd.write(doc.toprettyxml())
	508	fd.close()
	509	else:
	510	prstate.toXML(file=filename)
	511
[b35d3d1]	512	def write_toXML(self, datainfo=None, state=None):
	513	"""
	514	Write toXML, a helper for write()
	515
	516	: return: xml doc
	517	"""
	518	if datainfo is None:
[a07e72f]	519	datainfo = Data1D(x=[], y=[])
	520	elif not issubclass(datainfo.__class__, Data1D):
[3e41f43]	521	msg = "The cansas writer expects a Data1D "
	522	msg += "instance: %s" % str(datainfo.__class__.__name__)
	523	raise RuntimeError, msg
[91128648]	524
[b35d3d1]	525	# Create basic XML document
	526	doc, sasentry = self._to_xml_doc(datainfo)
	527
	528	# Add the invariant information to the XML document
	529	if state is not None:
	530	state.toXML(doc=doc, entry_node=sasentry)
	531
	532	return doc
[91128648]	533

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SasView

source: sasview/prview/perspectives/pr/inversion_state.py @ c958e30

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