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56  <div class="section" id="abstractfitengine">
57<h1>AbstractFitEngine<a class="headerlink" href="#abstractfitengine" title="Permalink to this headline">¶</a></h1>
58<div class="section" id="module-sans.fit.AbstractFitEngine">
59<span id="mod-sans-fit-abstractfitengine"></span><h2>:mod:` sans.fit.AbstractFitEngine`<a class="headerlink" href="#module-sans.fit.AbstractFitEngine" title="Permalink to this headline">¶</a></h2>
60<dl class="exception">
61<dt id="sans.fit.AbstractFitEngine.FitAbort">
62<em class="property">exception </em><tt class="descclassname">sans.fit.AbstractFitEngine.</tt><tt class="descname">FitAbort</tt><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitAbort" title="Permalink to this definition">¶</a></dt>
63<dd><p>Bases: <tt class="xref py py-class docutils literal"><span class="pre">exceptions.Exception</span></tt></p>
64<p>Exception raise to stop the fit</p>
65<dl class="attribute">
66<dt id="sans.fit.AbstractFitEngine.FitAbort.args">
67<tt class="descname">args</tt><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitAbort.args" title="Permalink to this definition">¶</a></dt>
68<dd></dd></dl>
69
70<dl class="attribute">
71<dt id="sans.fit.AbstractFitEngine.FitAbort.message">
72<tt class="descname">message</tt><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitAbort.message" title="Permalink to this definition">¶</a></dt>
73<dd><p>exception message</p>
74</dd></dl>
75
76</dd></dl>
77
78<dl class="class">
79<dt id="sans.fit.AbstractFitEngine.FitArrange">
80<em class="property">class </em><tt class="descclassname">sans.fit.AbstractFitEngine.</tt><tt class="descname">FitArrange</tt><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitArrange" title="Permalink to this definition">¶</a></dt>
81<dd><dl class="method">
82<dt id="sans.fit.AbstractFitEngine.FitArrange.add_data">
83<tt class="descname">add_data</tt><big>(</big><em>data</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitArrange.add_data" title="Permalink to this definition">¶</a></dt>
84<dd><p>add_data fill a self.data_list with data to fit</p>
85<table class="docutils field-list" frame="void" rules="none">
86<col class="field-name" />
87<col class="field-body" />
88<tbody valign="top">
89<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><strong>data</strong> &#8211; Data to add in the list</td>
90</tr>
91</tbody>
92</table>
93</dd></dl>
94
95<dl class="method">
96<dt id="sans.fit.AbstractFitEngine.FitArrange.get_data">
97<tt class="descname">get_data</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitArrange.get_data" title="Permalink to this definition">¶</a></dt>
98<dd><table class="docutils field-list" frame="void" rules="none">
99<col class="field-name" />
100<col class="field-body" />
101<tbody valign="top">
102<tr class="field"><th class="field-name">Returns:</th><td class="field-body">list of data data_list</td>
103</tr>
104</tbody>
105</table>
106</dd></dl>
107
108<dl class="method">
109<dt id="sans.fit.AbstractFitEngine.FitArrange.get_model">
110<tt class="descname">get_model</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitArrange.get_model" title="Permalink to this definition">¶</a></dt>
111<dd><table class="docutils field-list" frame="void" rules="none">
112<col class="field-name" />
113<col class="field-body" />
114<tbody valign="top">
115<tr class="field"><th class="field-name">Returns:</th><td class="field-body">saved model</td>
116</tr>
117</tbody>
118</table>
119</dd></dl>
120
121<dl class="method">
122<dt id="sans.fit.AbstractFitEngine.FitArrange.get_to_fit">
123<tt class="descname">get_to_fit</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitArrange.get_to_fit" title="Permalink to this definition">¶</a></dt>
124<dd><p>return self.selected value</p>
125</dd></dl>
126
127<dl class="method">
128<dt id="sans.fit.AbstractFitEngine.FitArrange.remove_data">
129<tt class="descname">remove_data</tt><big>(</big><em>data</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitArrange.remove_data" title="Permalink to this definition">¶</a></dt>
130<dd><p>Remove one element from the list</p>
131<table class="docutils field-list" frame="void" rules="none">
132<col class="field-name" />
133<col class="field-body" />
134<tbody valign="top">
135<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><strong>data</strong> &#8211; Data to remove from data_list</td>
136</tr>
137</tbody>
138</table>
139</dd></dl>
140
141<dl class="method">
142<dt id="sans.fit.AbstractFitEngine.FitArrange.set_model">
143<tt class="descname">set_model</tt><big>(</big><em>model</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitArrange.set_model" title="Permalink to this definition">¶</a></dt>
144<dd><p>set_model save a copy of the model</p>
145<table class="docutils field-list" frame="void" rules="none">
146<col class="field-name" />
147<col class="field-body" />
148<tbody valign="top">
149<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><strong>model</strong> &#8211; the model being set</td>
150</tr>
151</tbody>
152</table>
153</dd></dl>
154
155<dl class="method">
156<dt id="sans.fit.AbstractFitEngine.FitArrange.set_to_fit">
157<tt class="descname">set_to_fit</tt><big>(</big><em>value=0</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitArrange.set_to_fit" title="Permalink to this definition">¶</a></dt>
158<dd><p>set self.selected to 0 or 1  for other values raise an exception</p>
159<table class="docutils field-list" frame="void" rules="none">
160<col class="field-name" />
161<col class="field-body" />
162<tbody valign="top">
163<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><strong>value</strong> &#8211; integer between 0 or 1</td>
164</tr>
165</tbody>
166</table>
167</dd></dl>
168
169</dd></dl>
170
171<dl class="class">
172<dt id="sans.fit.AbstractFitEngine.FitData1D">
173<em class="property">class </em><tt class="descclassname">sans.fit.AbstractFitEngine.</tt><tt class="descname">FitData1D</tt><big>(</big><em>x</em>, <em>y</em>, <em>dx=None</em>, <em>dy=None</em>, <em>smearer=None</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData1D" title="Permalink to this definition">¶</a></dt>
174<dd><p>Bases: <tt class="xref py py-class docutils literal"><span class="pre">sans.dataloader.data_info.Data1D</span></tt></p>
175<p>Wrapper class  for SANS data
176FitData1D inherits from DataLoader.data_info.Data1D. Implements
177a way to get residuals from data.</p>
178<dl class="method">
179<dt id="sans.fit.AbstractFitEngine.FitData1D.add_notes">
180<tt class="descname">add_notes</tt><big>(</big><em>message=''</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData1D.add_notes" title="Permalink to this definition">¶</a></dt>
181<dd><p>Add notes to datainfo</p>
182</dd></dl>
183
184<dl class="method">
185<dt id="sans.fit.AbstractFitEngine.FitData1D.append_empty_process">
186<tt class="descname">append_empty_process</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData1D.append_empty_process" title="Permalink to this definition">¶</a></dt>
187<dd></dd></dl>
188
189<dl class="method">
190<dt id="sans.fit.AbstractFitEngine.FitData1D.clone_without_data">
191<tt class="descname">clone_without_data</tt><big>(</big><em>length=0</em>, <em>clone=None</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData1D.clone_without_data" title="Permalink to this definition">¶</a></dt>
192<dd><p>Clone the current object, without copying the data (which
193will be filled out by a subsequent operation).
194The data arrays will be initialized to zero.</p>
195<table class="docutils field-list" frame="void" rules="none">
196<col class="field-name" />
197<col class="field-body" />
198<tbody valign="top">
199<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
200<li><strong>length</strong> &#8211; length of the data array to be initialized</li>
201<li><strong>clone</strong> &#8211; if provided, the data will be copied to clone</li>
202</ul>
203</td>
204</tr>
205</tbody>
206</table>
207</dd></dl>
208
209<dl class="method">
210<dt id="sans.fit.AbstractFitEngine.FitData1D.get_fit_range">
211<tt class="descname">get_fit_range</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData1D.get_fit_range" title="Permalink to this definition">¶</a></dt>
212<dd><p>return the range of data.x to fit</p>
213</dd></dl>
214
215<dl class="method">
216<dt id="sans.fit.AbstractFitEngine.FitData1D.is_slit_smeared">
217<tt class="descname">is_slit_smeared</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData1D.is_slit_smeared" title="Permalink to this definition">¶</a></dt>
218<dd><p>Check whether the data has slit smearing information</p>
219<table class="docutils field-list" frame="void" rules="none">
220<col class="field-name" />
221<col class="field-body" />
222<tbody valign="top">
223<tr class="field"><th class="field-name">Returns:</th><td class="field-body">True is slit smearing info is present, False otherwise</td>
224</tr>
225</tbody>
226</table>
227</dd></dl>
228
229<dl class="method">
230<dt id="sans.fit.AbstractFitEngine.FitData1D.residuals">
231<tt class="descname">residuals</tt><big>(</big><em>fn</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData1D.residuals" title="Permalink to this definition">¶</a></dt>
232<dd><p>Compute residuals.</p>
233<p>If self.smearer has been set, use if to smear
234the data before computing chi squared.</p>
235<table class="docutils field-list" frame="void" rules="none">
236<col class="field-name" />
237<col class="field-body" />
238<tbody valign="top">
239<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><strong>fn</strong> &#8211; function that return model value</td>
240</tr>
241<tr class="field"><th class="field-name">Returns:</th><td class="field-body">residuals</td>
242</tr>
243</tbody>
244</table>
245</dd></dl>
246
247<dl class="method">
248<dt id="sans.fit.AbstractFitEngine.FitData1D.residuals_deriv">
249<tt class="descname">residuals_deriv</tt><big>(</big><em>model</em>, <em>pars=</em><span class="optional">[</span><span class="optional">]</span><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData1D.residuals_deriv" title="Permalink to this definition">¶</a></dt>
250<dd><table class="docutils field-list" frame="void" rules="none">
251<col class="field-name" />
252<col class="field-body" />
253<tbody valign="top">
254<tr class="field"><th class="field-name">Returns:</th><td class="field-body">residuals derivatives .</td>
255</tr>
256<tr class="field"><th class="field-name">Note :</th><td class="field-body">in this case just return empty array</td>
257</tr>
258</tbody>
259</table>
260</dd></dl>
261
262<dl class="method">
263<dt id="sans.fit.AbstractFitEngine.FitData1D.set_fit_range">
264<tt class="descname">set_fit_range</tt><big>(</big><em>qmin=None</em>, <em>qmax=None</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData1D.set_fit_range" title="Permalink to this definition">¶</a></dt>
265<dd><p>to set the fit range</p>
266</dd></dl>
267
268<dl class="method">
269<dt id="sans.fit.AbstractFitEngine.FitData1D.xaxis">
270<tt class="descname">xaxis</tt><big>(</big><em>label</em>, <em>unit</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData1D.xaxis" title="Permalink to this definition">¶</a></dt>
271<dd><p>set the x axis label and unit</p>
272</dd></dl>
273
274<dl class="method">
275<dt id="sans.fit.AbstractFitEngine.FitData1D.yaxis">
276<tt class="descname">yaxis</tt><big>(</big><em>label</em>, <em>unit</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData1D.yaxis" title="Permalink to this definition">¶</a></dt>
277<dd><p>set the y axis label and unit</p>
278</dd></dl>
279
280</dd></dl>
281
282<dl class="class">
283<dt id="sans.fit.AbstractFitEngine.FitData2D">
284<em class="property">class </em><tt class="descclassname">sans.fit.AbstractFitEngine.</tt><tt class="descname">FitData2D</tt><big>(</big><em>sans_data2d</em>, <em>data=None</em>, <em>err_data=None</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData2D" title="Permalink to this definition">¶</a></dt>
285<dd><p>Bases: <tt class="xref py py-class docutils literal"><span class="pre">sans.dataloader.data_info.Data2D</span></tt></p>
286<p>Wrapper class  for SANS data</p>
287<dl class="method">
288<dt id="sans.fit.AbstractFitEngine.FitData2D.add_notes">
289<tt class="descname">add_notes</tt><big>(</big><em>message=''</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData2D.add_notes" title="Permalink to this definition">¶</a></dt>
290<dd><p>Add notes to datainfo</p>
291</dd></dl>
292
293<dl class="method">
294<dt id="sans.fit.AbstractFitEngine.FitData2D.append_empty_process">
295<tt class="descname">append_empty_process</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData2D.append_empty_process" title="Permalink to this definition">¶</a></dt>
296<dd></dd></dl>
297
298<dl class="method">
299<dt id="sans.fit.AbstractFitEngine.FitData2D.clone_without_data">
300<tt class="descname">clone_without_data</tt><big>(</big><em>length=0</em>, <em>clone=None</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData2D.clone_without_data" title="Permalink to this definition">¶</a></dt>
301<dd><p>Clone the current object, without copying the data (which
302will be filled out by a subsequent operation).
303The data arrays will be initialized to zero.</p>
304<table class="docutils field-list" frame="void" rules="none">
305<col class="field-name" />
306<col class="field-body" />
307<tbody valign="top">
308<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
309<li><strong>length</strong> &#8211; length of the data array to be initialized</li>
310<li><strong>clone</strong> &#8211; if provided, the data will be copied to clone</li>
311</ul>
312</td>
313</tr>
314</tbody>
315</table>
316</dd></dl>
317
318<dl class="method">
319<dt id="sans.fit.AbstractFitEngine.FitData2D.get_fit_range">
320<tt class="descname">get_fit_range</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData2D.get_fit_range" title="Permalink to this definition">¶</a></dt>
321<dd><p>return the range of data.x to fit</p>
322</dd></dl>
323
324<dl class="method">
325<dt id="sans.fit.AbstractFitEngine.FitData2D.residuals">
326<tt class="descname">residuals</tt><big>(</big><em>fn</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData2D.residuals" title="Permalink to this definition">¶</a></dt>
327<dd><p>return the residuals</p>
328</dd></dl>
329
330<dl class="method">
331<dt id="sans.fit.AbstractFitEngine.FitData2D.residuals_deriv">
332<tt class="descname">residuals_deriv</tt><big>(</big><em>model</em>, <em>pars=</em><span class="optional">[</span><span class="optional">]</span><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData2D.residuals_deriv" title="Permalink to this definition">¶</a></dt>
333<dd><table class="docutils field-list" frame="void" rules="none">
334<col class="field-name" />
335<col class="field-body" />
336<tbody valign="top">
337<tr class="field"><th class="field-name">Returns:</th><td class="field-body">residuals derivatives .</td>
338</tr>
339<tr class="field"><th class="field-name">Note :</th><td class="field-body">in this case just return empty array</td>
340</tr>
341</tbody>
342</table>
343</dd></dl>
344
345<dl class="method">
346<dt id="sans.fit.AbstractFitEngine.FitData2D.set_data">
347<tt class="descname">set_data</tt><big>(</big><em>sans_data2d</em>, <em>qmin=None</em>, <em>qmax=None</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData2D.set_data" title="Permalink to this definition">¶</a></dt>
348<dd><p>Determine the correct qx_data and qy_data within range to fit</p>
349</dd></dl>
350
351<dl class="method">
352<dt id="sans.fit.AbstractFitEngine.FitData2D.set_fit_range">
353<tt class="descname">set_fit_range</tt><big>(</big><em>qmin=None</em>, <em>qmax=None</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData2D.set_fit_range" title="Permalink to this definition">¶</a></dt>
354<dd><p>to set the fit range</p>
355</dd></dl>
356
357<dl class="method">
358<dt id="sans.fit.AbstractFitEngine.FitData2D.set_smearer">
359<tt class="descname">set_smearer</tt><big>(</big><em>smearer</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData2D.set_smearer" title="Permalink to this definition">¶</a></dt>
360<dd><p>Set smearer</p>
361</dd></dl>
362
363<dl class="method">
364<dt id="sans.fit.AbstractFitEngine.FitData2D.xaxis">
365<tt class="descname">xaxis</tt><big>(</big><em>label</em>, <em>unit</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData2D.xaxis" title="Permalink to this definition">¶</a></dt>
366<dd><p>set the x axis label and unit</p>
367</dd></dl>
368
369<dl class="method">
370<dt id="sans.fit.AbstractFitEngine.FitData2D.yaxis">
371<tt class="descname">yaxis</tt><big>(</big><em>label</em>, <em>unit</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData2D.yaxis" title="Permalink to this definition">¶</a></dt>
372<dd><p>set the y axis label and unit</p>
373</dd></dl>
374
375<dl class="method">
376<dt id="sans.fit.AbstractFitEngine.FitData2D.zaxis">
377<tt class="descname">zaxis</tt><big>(</big><em>label</em>, <em>unit</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitData2D.zaxis" title="Permalink to this definition">¶</a></dt>
378<dd><p>set the z axis label and unit</p>
379</dd></dl>
380
381</dd></dl>
382
383<dl class="class">
384<dt id="sans.fit.AbstractFitEngine.FitEngine">
385<em class="property">class </em><tt class="descclassname">sans.fit.AbstractFitEngine.</tt><tt class="descname">FitEngine</tt><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitEngine" title="Permalink to this definition">¶</a></dt>
386<dd><dl class="method">
387<dt id="sans.fit.AbstractFitEngine.FitEngine.get_model">
388<tt class="descname">get_model</tt><big>(</big><em>id</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitEngine.get_model" title="Permalink to this definition">¶</a></dt>
389<dd><table class="docutils field-list" frame="void" rules="none">
390<col class="field-name" />
391<col class="field-body" />
392<tbody valign="top">
393<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><strong>id</strong> &#8211; id is key in the dictionary containing the model to return</td>
394</tr>
395<tr class="field"><th class="field-name">Returns:</th><td class="field-body">a model at this id or None if no FitArrange element was
396created with this id</td>
397</tr>
398</tbody>
399</table>
400</dd></dl>
401
402<dl class="method">
403<dt id="sans.fit.AbstractFitEngine.FitEngine.get_problem_to_fit">
404<tt class="descname">get_problem_to_fit</tt><big>(</big><em>id</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitEngine.get_problem_to_fit" title="Permalink to this definition">¶</a></dt>
405<dd><p>return the self.selected value of the fit problem of id</p>
406<table class="docutils field-list" frame="void" rules="none">
407<col class="field-name" />
408<col class="field-body" />
409<tbody valign="top">
410<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><strong>id</strong> &#8211; the id of the problem</td>
411</tr>
412</tbody>
413</table>
414</dd></dl>
415
416<dl class="method">
417<dt id="sans.fit.AbstractFitEngine.FitEngine.remove_fit_problem">
418<tt class="descname">remove_fit_problem</tt><big>(</big><em>id</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitEngine.remove_fit_problem" title="Permalink to this definition">¶</a></dt>
419<dd><p>remove   fitarrange in id</p>
420</dd></dl>
421
422<dl class="method">
423<dt id="sans.fit.AbstractFitEngine.FitEngine.select_problem_for_fit">
424<tt class="descname">select_problem_for_fit</tt><big>(</big><em>id</em>, <em>value</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitEngine.select_problem_for_fit" title="Permalink to this definition">¶</a></dt>
425<dd><p>select a couple of model and data at the id position in dictionary
426and set in self.selected value to value</p>
427<table class="docutils field-list" frame="void" rules="none">
428<col class="field-name" />
429<col class="field-body" />
430<tbody valign="top">
431<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><strong>value</strong> &#8211; the value to allow fitting.
432can only have the value one or zero</td>
433</tr>
434</tbody>
435</table>
436</dd></dl>
437
438<dl class="method">
439<dt id="sans.fit.AbstractFitEngine.FitEngine.set_data">
440<tt class="descname">set_data</tt><big>(</big><em>data</em>, <em>id</em>, <em>smearer=None</em>, <em>qmin=None</em>, <em>qmax=None</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitEngine.set_data" title="Permalink to this definition">¶</a></dt>
441<dd><p>Receives plottable, creates a list of data to fit,set data
442in a FitArrange object and adds that object in a dictionary
443with key id.</p>
444<table class="docutils field-list" frame="void" rules="none">
445<col class="field-name" />
446<col class="field-body" />
447<tbody valign="top">
448<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
449<li><strong>data</strong> &#8211; data added</li>
450<li><strong>id</strong> &#8211; unique key corresponding to a fitArrange object with data</li>
451</ul>
452</td>
453</tr>
454</tbody>
455</table>
456</dd></dl>
457
458<dl class="method">
459<dt id="sans.fit.AbstractFitEngine.FitEngine.set_model">
460<tt class="descname">set_model</tt><big>(</big><em>model</em>, <em>id</em>, <em>pars=</em><span class="optional">[</span><span class="optional">]</span>, <em>constraints=</em><span class="optional">[</span><span class="optional">]</span><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.FitEngine.set_model" title="Permalink to this definition">¶</a></dt>
461<dd><p>set a model on a given  in the fit engine.</p>
462<table class="docutils field-list" frame="void" rules="none">
463<col class="field-name" />
464<col class="field-body" />
465<tbody valign="top">
466<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><strong>model</strong> &#8211; sans.models type</td>
467</tr>
468</tbody>
469</table>
470<dl class="docutils">
471<dt>:param <span class="classifier-delimiter">:</span> <span class="classifier">is the key of the fitArrange dictionary where model is </span></dt>
472<dd>saved as a value</dd>
473</dl>
474<table class="docutils field-list" frame="void" rules="none">
475<col class="field-name" />
476<col class="field-body" />
477<tbody valign="top">
478<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
479<li><strong>pars</strong> &#8211; the list of parameters to fit</li>
480<li><strong>constraints</strong> &#8211; <p>list of
481tuple (name of parameter, value of parameters)
482the value of parameter must be a string to constraint 2 different
483parameters.
484Example: 
485we want to fit 2 model M1 and M2 both have parameters A and B.
486constraints can be:</p>
487<blockquote>
488<div>constraints = [(M1.A, M2.B+2), (M1.B= M2.A <a href="#id1"><span class="problematic" id="id2">*</span></a>5),...,]</div></blockquote>
489</li>
490</ul>
491</td>
492</tr>
493<tr class="field"><th class="field-name">Note :</th><td class="field-body"><p class="first last">pars must contains only name of existing model&#8217;s parameters</p>
494</td>
495</tr>
496</tbody>
497</table>
498</dd></dl>
499
500</dd></dl>
501
502<dl class="class">
503<dt id="sans.fit.AbstractFitEngine.Model">
504<em class="property">class </em><tt class="descclassname">sans.fit.AbstractFitEngine.</tt><tt class="descname">Model</tt><big>(</big><em>sans_model</em>, <em>**kw</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.Model" title="Permalink to this definition">¶</a></dt>
505<dd><p>Bases: <tt class="xref py py-class docutils literal"><span class="pre">park.model.Model</span></tt></p>
506<p>PARK wrapper for SANS models.</p>
507<dl class="method">
508<dt id="sans.fit.AbstractFitEngine.Model.eval">
509<tt class="descname">eval</tt><big>(</big><em>x</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.Model.eval" title="Permalink to this definition">¶</a></dt>
510<dd><p>override eval method of park model.</p>
511<table class="docutils field-list" frame="void" rules="none">
512<col class="field-name" />
513<col class="field-body" />
514<tbody valign="top">
515<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><strong>x</strong> &#8211; the x value used to compute a function</td>
516</tr>
517</tbody>
518</table>
519</dd></dl>
520
521<dl class="method">
522<dt id="sans.fit.AbstractFitEngine.Model.eval_derivs">
523<tt class="descname">eval_derivs</tt><big>(</big><em>x</em>, <em>pars=</em><span class="optional">[</span><span class="optional">]</span><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.Model.eval_derivs" title="Permalink to this definition">¶</a></dt>
524<dd><p>Evaluate the model and derivatives wrt pars at x.</p>
525<p>pars is a list of the names of the parameters for which derivatives
526are desired.</p>
527<p>This method needs to be specialized in the model to evaluate the
528model function.  Alternatively, the model can implement is own
529version of residuals which calculates the residuals directly
530instead of calling eval.</p>
531</dd></dl>
532
533<dl class="method">
534<dt id="sans.fit.AbstractFitEngine.Model.get_params">
535<tt class="descname">get_params</tt><big>(</big><em>fitparams</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.Model.get_params" title="Permalink to this definition">¶</a></dt>
536<dd><p>return a list of value of paramter to fit</p>
537<table class="docutils field-list" frame="void" rules="none">
538<col class="field-name" />
539<col class="field-body" />
540<tbody valign="top">
541<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><strong>fitparams</strong> &#8211; list of paramaters name to fit</td>
542</tr>
543</tbody>
544</table>
545</dd></dl>
546
547<dl class="method">
548<dt id="sans.fit.AbstractFitEngine.Model.set">
549<tt class="descname">set</tt><big>(</big><em>**kw</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.Model.set" title="Permalink to this definition">¶</a></dt>
550<dd><p>Set the initial value for a set of parameters.</p>
551<p>E.g., model.set(width=3,center=5)</p>
552</dd></dl>
553
554<dl class="method">
555<dt id="sans.fit.AbstractFitEngine.Model.set_params">
556<tt class="descname">set_params</tt><big>(</big><em>paramlist</em>, <em>params</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.Model.set_params" title="Permalink to this definition">¶</a></dt>
557<dd><p>Set value for parameters to fit</p>
558<table class="docutils field-list" frame="void" rules="none">
559<col class="field-name" />
560<col class="field-body" />
561<tbody valign="top">
562<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><strong>params</strong> &#8211; list of value for parameters to fit</td>
563</tr>
564</tbody>
565</table>
566</dd></dl>
567
568</dd></dl>
569
570<dl class="class">
571<dt id="sans.fit.AbstractFitEngine.SansAssembly">
572<em class="property">class </em><tt class="descclassname">sans.fit.AbstractFitEngine.</tt><tt class="descname">SansAssembly</tt><big>(</big><em>paramlist</em>, <em>model=None</em>, <em>data=None</em>, <em>fitresult=None</em>, <em>handler=None</em>, <em>curr_thread=None</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.SansAssembly" title="Permalink to this definition">¶</a></dt>
573<dd><p>Sans Assembly class a class wrapper to be call in optimizer.leastsq method</p>
574<dl class="method">
575<dt id="sans.fit.AbstractFitEngine.SansAssembly.check_param_range">
576<tt class="descname">check_param_range</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.SansAssembly.check_param_range" title="Permalink to this definition">¶</a></dt>
577<dd><p>Check the lower and upper bound of the parameter value
578and set res to the inf if the value is outside of the
579range
580:limitation: the initial values must be within range.</p>
581</dd></dl>
582
583<dl class="method">
584<dt id="sans.fit.AbstractFitEngine.SansAssembly.chisq">
585<tt class="descname">chisq</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.SansAssembly.chisq" title="Permalink to this definition">¶</a></dt>
586<dd><p>Calculates chi^2</p>
587<table class="docutils field-list" frame="void" rules="none">
588<col class="field-name" />
589<col class="field-body" />
590<tbody valign="top">
591<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><strong>params</strong> &#8211; list of parameter values</td>
592</tr>
593<tr class="field"><th class="field-name">Returns:</th><td class="field-body">chi^2</td>
594</tr>
595</tbody>
596</table>
597</dd></dl>
598
599</dd></dl>
600
601<dl class="class">
602<dt id="sans.fit.AbstractFitEngine.SansParameter">
603<em class="property">class </em><tt class="descclassname">sans.fit.AbstractFitEngine.</tt><tt class="descname">SansParameter</tt><big>(</big><em>name</em>, <em>model</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.SansParameter" title="Permalink to this definition">¶</a></dt>
604<dd><p>Bases: <tt class="xref py py-class docutils literal"><span class="pre">park.parameter.Parameter</span></tt></p>
605<p>SANS model parameters for use in the PARK fitting service.
606The parameter attribute value is redirected to the underlying
607parameter value in the SANS model.</p>
608<dl class="method">
609<dt id="sans.fit.AbstractFitEngine.SansParameter.get">
610<tt class="descname">get</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.SansParameter.get" title="Permalink to this definition">¶</a></dt>
611<dd><p>Return the current value for a parameter.</p>
612</dd></dl>
613
614<dl class="method">
615<dt id="sans.fit.AbstractFitEngine.SansParameter.get_name">
616<tt class="descname">get_name</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.SansParameter.get_name" title="Permalink to this definition">¶</a></dt>
617<dd></dd></dl>
618
619<dl class="method">
620<dt id="sans.fit.AbstractFitEngine.SansParameter.iscomputed">
621<tt class="descname">iscomputed</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.SansParameter.iscomputed" title="Permalink to this definition">¶</a></dt>
622<dd></dd></dl>
623
624<dl class="method">
625<dt id="sans.fit.AbstractFitEngine.SansParameter.isfeasible">
626<tt class="descname">isfeasible</tt><big>(</big><em>value</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.SansParameter.isfeasible" title="Permalink to this definition">¶</a></dt>
627<dd><p>Return true if the value is in the range</p>
628</dd></dl>
629
630<dl class="method">
631<dt id="sans.fit.AbstractFitEngine.SansParameter.isfitted">
632<tt class="descname">isfitted</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.SansParameter.isfitted" title="Permalink to this definition">¶</a></dt>
633<dd></dd></dl>
634
635<dl class="method">
636<dt id="sans.fit.AbstractFitEngine.SansParameter.isfixed">
637<tt class="descname">isfixed</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.SansParameter.isfixed" title="Permalink to this definition">¶</a></dt>
638<dd></dd></dl>
639
640<dl class="method">
641<dt id="sans.fit.AbstractFitEngine.SansParameter.isrestrained">
642<tt class="descname">isrestrained</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.SansParameter.isrestrained" title="Permalink to this definition">¶</a></dt>
643<dd></dd></dl>
644
645<dl class="attribute">
646<dt id="sans.fit.AbstractFitEngine.SansParameter.name">
647<tt class="descname">name</tt><a class="headerlink" href="#sans.fit.AbstractFitEngine.SansParameter.name" title="Permalink to this definition">¶</a></dt>
648<dd><p>parameter name</p>
649</dd></dl>
650
651<dl class="attribute">
652<dt id="sans.fit.AbstractFitEngine.SansParameter.range">
653<tt class="descname">range</tt><a class="headerlink" href="#sans.fit.AbstractFitEngine.SansParameter.range" title="Permalink to this definition">¶</a></dt>
654<dd><p>Override _getrange of park parameter
655return the range of parameter</p>
656</dd></dl>
657
658<dl class="method">
659<dt id="sans.fit.AbstractFitEngine.SansParameter.set">
660<tt class="descname">set</tt><big>(</big><em>value</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.SansParameter.set" title="Permalink to this definition">¶</a></dt>
661<dd><p>Set a parameter to a value, a range or an expression.  If it is a value,
662the parameter will be fixed for the fit.  If it is a range, the value
663will be varying for the fit.  If it is an expression, the parameter will
664be calculated from the values of other parameters in the fit.</p>
665<p>Raises ValueError if the value could not be interpreted.</p>
666</dd></dl>
667
668<dl class="method">
669<dt id="sans.fit.AbstractFitEngine.SansParameter.setprefix">
670<tt class="descname">setprefix</tt><big>(</big><em>prefix</em><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.SansParameter.setprefix" title="Permalink to this definition">¶</a></dt>
671<dd><p>Set the full path to the parameter as used in expressions involving
672the parameter name.</p>
673</dd></dl>
674
675<dl class="method">
676<dt id="sans.fit.AbstractFitEngine.SansParameter.summarize">
677<tt class="descname">summarize</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.fit.AbstractFitEngine.SansParameter.summarize" title="Permalink to this definition">¶</a></dt>
678<dd><p>Return parameter range string.</p>
679<p>E.g.,  &#8221;       Gold .....|.... 5.2043 in [2,7]&#8221;</p>
680</dd></dl>
681
682<dl class="attribute">
683<dt id="sans.fit.AbstractFitEngine.SansParameter.value">
684<tt class="descname">value</tt><a class="headerlink" href="#sans.fit.AbstractFitEngine.SansParameter.value" title="Permalink to this definition">¶</a></dt>
685<dd><p>override the _getvalue of park parameter</p>
686<p>:return value the parameter associates with self.name</p>
687</dd></dl>
688
689</dd></dl>
690
691</div>
692</div>
693
694
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700  <h3><a href="../index.html">Table Of Contents</a></h3>
701  <ul>
702<li><a class="reference internal" href="#">AbstractFitEngine</a><ul>
703<li><a class="reference internal" href="#module-sans.fit.AbstractFitEngine">:mod:` sans.fit.AbstractFitEngine`</a></li>
704</ul>
705</li>
706</ul>
707
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