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56  <div class="section" id="porodmodel">
57<h1>PorodModel<a class="headerlink" href="#porodmodel" title="Permalink to this headline">¶</a></h1>
58<div class="section" id="module-sans.models.PorodModel">
59<span id="sans-models-porodmodel"></span><h2><a class="reference internal" href="#module-sans.models.PorodModel"><tt class="xref py py-mod docutils literal"><span class="pre">sans.models.PorodModel</span></tt></a><a class="headerlink" href="#module-sans.models.PorodModel" title="Permalink to this headline">¶</a></h2>
60<p>Provide I(q) = C/q^4,
61Porod function as a BaseComponent model</p>
62<dl class="class">
63<dt id="sans.models.PorodModel.PorodModel">
64<em class="property">class </em><tt class="descclassname">sans.models.PorodModel.</tt><tt class="descname">PorodModel</tt><a class="headerlink" href="#sans.models.PorodModel.PorodModel" title="Permalink to this definition">¶</a></dt>
65<dd><p>Bases: <a class="reference internal" href="BaseComponent.html#sans.models.BaseComponent.BaseComponent" title="sans.models.BaseComponent.BaseComponent"><tt class="xref py py-class docutils literal"><span class="pre">sans.models.BaseComponent.BaseComponent</span></tt></a></p>
66<p>Class that evaluates a Porod model.</p>
67<p>I(q) = scale/q^4 +background</p>
68<dl class="method">
69<dt id="sans.models.PorodModel.PorodModel.calculate_ER">
70<tt class="descname">calculate_ER</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.models.PorodModel.PorodModel.calculate_ER" title="Permalink to this definition">¶</a></dt>
71<dd></dd></dl>
72
73<dl class="method">
74<dt id="sans.models.PorodModel.PorodModel.clone">
75<tt class="descname">clone</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.models.PorodModel.PorodModel.clone" title="Permalink to this definition">¶</a></dt>
76<dd>Returns a new object identical to the current object</dd></dl>
77
78<dl class="method">
79<dt id="sans.models.PorodModel.PorodModel.evalDistribution">
80<tt class="descname">evalDistribution</tt><big>(</big><em>qdist</em><big>)</big><a class="headerlink" href="#sans.models.PorodModel.PorodModel.evalDistribution" title="Permalink to this definition">¶</a></dt>
81<dd><p>Evaluate a distribution of q-values.</p>
82<ul>
83<li><p class="first">For 1D, a numpy array is expected as input:</p>
84<blockquote>
85<p>evalDistribution(q)</p>
86</blockquote>
87</li>
88</ul>
89<p>where q is a numpy array.</p>
90<ul class="simple">
91<li>For 2D, a list of numpy arrays are expected: [qx_prime,qy_prime],
92where 1D arrays,</li>
93</ul>
94<p>qx_prime = [ qx[0], qx[1], qx[2], ....]
95and
96qy_prime = [ qy[0], qy[1], qy[2], ....]</p>
97<p>Then get
98q = numpy.sqrt(qx_prime^2+qy_prime^2)</p>
99<p>that is a qr in 1D array;
100q = [q[0], q[1], q[2], ....]</p>
101<table class="docutils field-list" frame="void" rules="none">
102<col class="field-name" />
103<col class="field-body" />
104<tbody valign="top">
105<tr class="field"><th class="field-name">Note :</th><td class="field-body"><p class="first">Due to 2D speed issue, no anisotropic scattering
106is supported for python models, thus C-models should have</p>
107<blockquote class="last">
108<p>their own evalDistribution methods.</p>
109</blockquote>
110</td>
111</tr>
112</tbody>
113</table>
114<p>The method is then called the following way:</p>
115<p>evalDistribution(q)
116where q is a numpy array.</p>
117<table class="docutils field-list" frame="void" rules="none">
118<col class="field-name" />
119<col class="field-body" />
120<tbody valign="top">
121<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
122<li><strong>qdist</strong> &#8211; ndarray of scalar q-values or list [qx,qy]
123where qx,qy are 1D ndarrays</li>
124</ul>
125</td>
126</tr>
127</tbody>
128</table>
129</dd></dl>
130
131<dl class="method">
132<dt id="sans.models.PorodModel.PorodModel.getDispParamList">
133<tt class="descname">getDispParamList</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.models.PorodModel.PorodModel.getDispParamList" title="Permalink to this definition">¶</a></dt>
134<dd>Return a list of all available parameters for the model</dd></dl>
135
136<dl class="method">
137<dt id="sans.models.PorodModel.PorodModel.getParam">
138<tt class="descname">getParam</tt><big>(</big><em>name</em><big>)</big><a class="headerlink" href="#sans.models.PorodModel.PorodModel.getParam" title="Permalink to this definition">¶</a></dt>
139<dd><p>Set the value of a model parameter</p>
140<table class="docutils field-list" frame="void" rules="none">
141<col class="field-name" />
142<col class="field-body" />
143<tbody valign="top">
144<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
145<li><strong>name</strong> &#8211; name of the parameter</li>
146</ul>
147</td>
148</tr>
149</tbody>
150</table>
151</dd></dl>
152
153<dl class="method">
154<dt id="sans.models.PorodModel.PorodModel.getParamList">
155<tt class="descname">getParamList</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.models.PorodModel.PorodModel.getParamList" title="Permalink to this definition">¶</a></dt>
156<dd>Return a list of all available parameters for the model</dd></dl>
157
158<dl class="method">
159<dt id="sans.models.PorodModel.PorodModel.getParamListWithToken">
160<tt class="descname">getParamListWithToken</tt><big>(</big><em>token</em>, <em>member</em><big>)</big><a class="headerlink" href="#sans.models.PorodModel.PorodModel.getParamListWithToken" title="Permalink to this definition">¶</a></dt>
161<dd></dd></dl>
162
163<dl class="method">
164<dt id="sans.models.PorodModel.PorodModel.getParamWithToken">
165<tt class="descname">getParamWithToken</tt><big>(</big><em>name</em>, <em>token</em>, <em>member</em><big>)</big><a class="headerlink" href="#sans.models.PorodModel.PorodModel.getParamWithToken" title="Permalink to this definition">¶</a></dt>
166<dd></dd></dl>
167
168<dl class="method">
169<dt id="sans.models.PorodModel.PorodModel.is_fittable">
170<tt class="descname">is_fittable</tt><big>(</big><em>par_name</em><big>)</big><a class="headerlink" href="#sans.models.PorodModel.PorodModel.is_fittable" title="Permalink to this definition">¶</a></dt>
171<dd><p>Check if a given parameter is fittable or not</p>
172<table class="docutils field-list" frame="void" rules="none">
173<col class="field-name" />
174<col class="field-body" />
175<tbody valign="top">
176<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
177<li><strong>par_name</strong> &#8211; the parameter name to check</li>
178</ul>
179</td>
180</tr>
181</tbody>
182</table>
183</dd></dl>
184
185<dl class="method">
186<dt id="sans.models.PorodModel.PorodModel.run">
187<tt class="descname">run</tt><big>(</big><em>x=0.0</em><big>)</big><a class="headerlink" href="#sans.models.PorodModel.PorodModel.run" title="Permalink to this definition">¶</a></dt>
188<dd>Evaluate the model
189&#64;param x: input q-value (float or [float, float] as [r, theta])
190&#64;return: (porod value)</dd></dl>
191
192<dl class="method">
193<dt id="sans.models.PorodModel.PorodModel.runXY">
194<tt class="descname">runXY</tt><big>(</big><em>x=0.0</em><big>)</big><a class="headerlink" href="#sans.models.PorodModel.PorodModel.runXY" title="Permalink to this definition">¶</a></dt>
195<dd>Evaluate the model
196&#64;param x: input q-value (float or [float, float] as [qx, qy])
197&#64;return: porod value</dd></dl>
198
199<dl class="method">
200<dt id="sans.models.PorodModel.PorodModel.setParam">
201<tt class="descname">setParam</tt><big>(</big><em>name</em>, <em>value</em><big>)</big><a class="headerlink" href="#sans.models.PorodModel.PorodModel.setParam" title="Permalink to this definition">¶</a></dt>
202<dd><p>Set the value of a model parameter</p>
203<table class="docutils field-list" frame="void" rules="none">
204<col class="field-name" />
205<col class="field-body" />
206<tbody valign="top">
207<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
208<li><strong>name</strong> &#8211; name of the parameter</li>
209<li><strong>value</strong> &#8211; value of the parameter</li>
210</ul>
211</td>
212</tr>
213</tbody>
214</table>
215</dd></dl>
216
217<dl class="method">
218<dt id="sans.models.PorodModel.PorodModel.setParamWithToken">
219<tt class="descname">setParamWithToken</tt><big>(</big><em>name</em>, <em>value</em>, <em>token</em>, <em>member</em><big>)</big><a class="headerlink" href="#sans.models.PorodModel.PorodModel.setParamWithToken" title="Permalink to this definition">¶</a></dt>
220<dd></dd></dl>
221
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