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56  <div class="section" id="teubnerstreymodel">
57<h1>TeubnerStreyModel<a class="headerlink" href="#teubnerstreymodel" title="Permalink to this headline">¶</a></h1>
58<div class="section" id="module-sans.models.TeubnerStreyModel">
59<span id="sans-models-teubnerstreymodel"></span><h2><a class="reference internal" href="#module-sans.models.TeubnerStreyModel" title="sans.models.TeubnerStreyModel"><tt class="xref py py-mod docutils literal"><span class="pre">sans.models.TeubnerStreyModel</span></tt></a><a class="headerlink" href="#module-sans.models.TeubnerStreyModel" title="Permalink to this headline">¶</a></h2>
60<p>Provide F(x) = 1/( scale + c1*(x)^(2)+  c2*(x)^(4)) + bkd
61Teubner-Strey function as a BaseComponent model</p>
62<dl class="class">
63<dt id="sans.models.TeubnerStreyModel.TeubnerStreyModel">
64<em class="property">class </em><tt class="descclassname">sans.models.TeubnerStreyModel.</tt><tt class="descname">TeubnerStreyModel</tt><a class="headerlink" href="#sans.models.TeubnerStreyModel.TeubnerStreyModel" 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  the TeubnerStrey model.</p>
67<p>F(x) = 1/( scale + c1*(x)^(2)+  c2*(x)^(4)) + bkd</p>
68<dl class="docutils">
69<dt>The model has Four parameters: </dt>
70<dd>scale  =  scale factor
71c1     =  constant
72c2     =  constant
73bkd    =  incoherent background</dd>
74</dl>
75<dl class="method">
76<dt id="sans.models.TeubnerStreyModel.TeubnerStreyModel.calculate_ER">
77<tt class="descname">calculate_ER</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.models.TeubnerStreyModel.TeubnerStreyModel.calculate_ER" title="Permalink to this definition">¶</a></dt>
78<dd></dd></dl>
79
80<dl class="method">
81<dt id="sans.models.TeubnerStreyModel.TeubnerStreyModel.clone">
82<tt class="descname">clone</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.models.TeubnerStreyModel.TeubnerStreyModel.clone" title="Permalink to this definition">¶</a></dt>
83<dd><p>Returns a new object identical to the current object</p>
84</dd></dl>
85
86<dl class="method">
87<dt id="sans.models.TeubnerStreyModel.TeubnerStreyModel.evalDistribution">
88<tt class="descname">evalDistribution</tt><big>(</big><em>qdist</em><big>)</big><a class="headerlink" href="#sans.models.TeubnerStreyModel.TeubnerStreyModel.evalDistribution" title="Permalink to this definition">¶</a></dt>
89<dd><p>Evaluate a distribution of q-values.</p>
90<ul>
91<li><p class="first">For 1D, a numpy array is expected as input:</p>
92<blockquote>
93<div><p>evalDistribution(q)</p>
94</div></blockquote>
95</li>
96</ul>
97<p>where q is a numpy array.</p>
98<ul class="simple">
99<li>For 2D, a list of numpy arrays are expected: [qx_prime,qy_prime],
100where 1D arrays,</li>
101</ul>
102<p>qx_prime = [ qx[0], qx[1], qx[2], ....]
103and
104qy_prime = [ qy[0], qy[1], qy[2], ....]</p>
105<p>Then get
106q = numpy.sqrt(qx_prime^2+qy_prime^2)</p>
107<p>that is a qr in 1D array;
108q = [q[0], q[1], q[2], ....]</p>
109<table class="docutils field-list" frame="void" rules="none">
110<col class="field-name" />
111<col class="field-body" />
112<tbody valign="top">
113<tr class="field"><th class="field-name">Note :</th><td class="field-body"><p class="first">Due to 2D speed issue, no anisotropic scattering
114is supported for python models, thus C-models should have</p>
115<blockquote class="last">
116<div><p>their own evalDistribution methods.</p>
117</div></blockquote>
118</td>
119</tr>
120</tbody>
121</table>
122<p>The method is then called the following way:</p>
123<p>evalDistribution(q)
124where q is a numpy array.</p>
125<table class="docutils field-list" frame="void" rules="none">
126<col class="field-name" />
127<col class="field-body" />
128<tbody valign="top">
129<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]
130where qx,qy are 1D ndarrays</td>
131</tr>
132</tbody>
133</table>
134</dd></dl>
135
136<dl class="method">
137<dt id="sans.models.TeubnerStreyModel.TeubnerStreyModel.getDispParamList">
138<tt class="descname">getDispParamList</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.models.TeubnerStreyModel.TeubnerStreyModel.getDispParamList" title="Permalink to this definition">¶</a></dt>
139<dd><p>Return a list of all available parameters for the model</p>
140</dd></dl>
141
142<dl class="method">
143<dt id="sans.models.TeubnerStreyModel.TeubnerStreyModel.getParam">
144<tt class="descname">getParam</tt><big>(</big><em>name</em><big>)</big><a class="headerlink" href="#sans.models.TeubnerStreyModel.TeubnerStreyModel.getParam" title="Permalink to this definition">¶</a></dt>
145<dd><p>Set the value of a model parameter</p>
146<table class="docutils field-list" frame="void" rules="none">
147<col class="field-name" />
148<col class="field-body" />
149<tbody valign="top">
150<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><strong>name</strong> &#8211; name of the parameter</td>
151</tr>
152</tbody>
153</table>
154</dd></dl>
155
156<dl class="method">
157<dt id="sans.models.TeubnerStreyModel.TeubnerStreyModel.getParamList">
158<tt class="descname">getParamList</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.models.TeubnerStreyModel.TeubnerStreyModel.getParamList" title="Permalink to this definition">¶</a></dt>
159<dd><p>Return a list of all available parameters for the model</p>
160</dd></dl>
161
162<dl class="method">
163<dt id="sans.models.TeubnerStreyModel.TeubnerStreyModel.getParamListWithToken">
164<tt class="descname">getParamListWithToken</tt><big>(</big><em>token</em>, <em>member</em><big>)</big><a class="headerlink" href="#sans.models.TeubnerStreyModel.TeubnerStreyModel.getParamListWithToken" title="Permalink to this definition">¶</a></dt>
165<dd></dd></dl>
166
167<dl class="method">
168<dt id="sans.models.TeubnerStreyModel.TeubnerStreyModel.getParamWithToken">
169<tt class="descname">getParamWithToken</tt><big>(</big><em>name</em>, <em>token</em>, <em>member</em><big>)</big><a class="headerlink" href="#sans.models.TeubnerStreyModel.TeubnerStreyModel.getParamWithToken" title="Permalink to this definition">¶</a></dt>
170<dd></dd></dl>
171
172<dl class="method">
173<dt id="sans.models.TeubnerStreyModel.TeubnerStreyModel.is_fittable">
174<tt class="descname">is_fittable</tt><big>(</big><em>par_name</em><big>)</big><a class="headerlink" href="#sans.models.TeubnerStreyModel.TeubnerStreyModel.is_fittable" title="Permalink to this definition">¶</a></dt>
175<dd><p>Check if a given parameter is fittable or not</p>
176<table class="docutils field-list" frame="void" rules="none">
177<col class="field-name" />
178<col class="field-body" />
179<tbody valign="top">
180<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><strong>par_name</strong> &#8211; the parameter name to check</td>
181</tr>
182</tbody>
183</table>
184</dd></dl>
185
186<dl class="method">
187<dt id="sans.models.TeubnerStreyModel.TeubnerStreyModel.run">
188<tt class="descname">run</tt><big>(</big><em>x=0.0</em><big>)</big><a class="headerlink" href="#sans.models.TeubnerStreyModel.TeubnerStreyModel.run" title="Permalink to this definition">¶</a></dt>
189<dd><p>Evaluate the model
190&#64;param x: input q-value (float or [float, float] as [r, theta])
191&#64;return: (PowerLaw value)</p>
192</dd></dl>
193
194<dl class="method">
195<dt id="sans.models.TeubnerStreyModel.TeubnerStreyModel.runXY">
196<tt class="descname">runXY</tt><big>(</big><em>x=0.0</em><big>)</big><a class="headerlink" href="#sans.models.TeubnerStreyModel.TeubnerStreyModel.runXY" title="Permalink to this definition">¶</a></dt>
197<dd><p>Evaluate the model
198&#64;param x: input q-value (float or [float, float] as [qx, qy])
199&#64;return: PowerLaw value</p>
200</dd></dl>
201
202<dl class="method">
203<dt id="sans.models.TeubnerStreyModel.TeubnerStreyModel.setParam">
204<tt class="descname">setParam</tt><big>(</big><em>name</em>, <em>value</em><big>)</big><a class="headerlink" href="#sans.models.TeubnerStreyModel.TeubnerStreyModel.setParam" title="Permalink to this definition">¶</a></dt>
205<dd><p>Set the value of a model parameter</p>
206<table class="docutils field-list" frame="void" rules="none">
207<col class="field-name" />
208<col class="field-body" />
209<tbody valign="top">
210<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
211<li><strong>name</strong> &#8211; name of the parameter</li>
212<li><strong>value</strong> &#8211; value of the parameter</li>
213</ul>
214</td>
215</tr>
216</tbody>
217</table>
218</dd></dl>
219
220<dl class="method">
221<dt id="sans.models.TeubnerStreyModel.TeubnerStreyModel.setParamWithToken">
222<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.TeubnerStreyModel.TeubnerStreyModel.setParamWithToken" title="Permalink to this definition">¶</a></dt>
223<dd></dd></dl>
224
225<dl class="method">
226<dt id="sans.models.TeubnerStreyModel.TeubnerStreyModel.teubnerStreyDistance">
227<tt class="descname">teubnerStreyDistance</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.models.TeubnerStreyModel.TeubnerStreyModel.teubnerStreyDistance" title="Permalink to this definition">¶</a></dt>
228<dd><p>Calculate the quasi-periodic repeat distance (D/(2*pi))
229&#64;return D: quasi-periodic repeat distance</p>
230</dd></dl>
231
232<dl class="method">
233<dt id="sans.models.TeubnerStreyModel.TeubnerStreyModel.teubnerStreyLengths">
234<tt class="descname">teubnerStreyLengths</tt><big>(</big><big>)</big><a class="headerlink" href="#sans.models.TeubnerStreyModel.TeubnerStreyModel.teubnerStreyLengths" title="Permalink to this definition">¶</a></dt>
235<dd><p>Calculate the correlation length (L)
236&#64;return L: the correlation distance</p>
237</dd></dl>
238
239</dd></dl>
240
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