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