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51  <h1>Source code for sas.models.CoreShellModel</h1><div class="highlight"><pre>
52<span class="c">##############################################################################</span>
53<span class="c"># This software was developed by the University of Tennessee as part of the</span>
54<span class="c"># Distributed Data Analysis of Neutron Scattering Experiments (DANSE)</span>
55<span class="c"># project funded by the US National Science Foundation.</span>
56<span class="c">#</span>
57<span class="c"># If you use DANSE applications to do scientific research that leads to</span>
58<span class="c"># publication, we ask that you acknowledge the use of the software with the</span>
59<span class="c"># following sentence:</span>
60<span class="c">#</span>
61<span class="c"># This work benefited from DANSE software developed under NSF award DMR-0520547</span>
62<span class="c">#</span>
63<span class="c"># Copyright 2008-2011, University of Tennessee</span>
64<span class="c">##############################################################################</span>
65
66<span class="sd">&quot;&quot;&quot; </span>
67<span class="sd">Provide functionality for a C extension model</span>
68
69<span class="sd">.. WARNING::</span>
70
71<span class="sd">   THIS FILE WAS GENERATED BY WRAPPERGENERATOR.PY</span>
72<span class="sd">   DO NOT MODIFY THIS FILE, MODIFY</span>
73<span class="sd">   src/sas/models/include/core_shell.h</span>
74<span class="sd">   AND RE-RUN THE GENERATOR SCRIPT</span>
75<span class="sd">&quot;&quot;&quot;</span>
76
77<span class="kn">from</span> <span class="nn">sas.models.BaseComponent</span> <span class="kn">import</span> <span class="n">BaseComponent</span>
78<span class="kn">from</span> <span class="nn">sas.models.sas_extension.c_models</span> <span class="kn">import</span> <span class="n">CCoreShellModel</span>
79
80<div class="viewcode-block" id="create_CoreShellModel"><a class="viewcode-back" href="../../../dev/api/sas.models.html#sas.models.CoreShellModel.create_CoreShellModel">[docs]</a><span class="k">def</span> <span class="nf">create_CoreShellModel</span><span class="p">():</span>
81    <span class="sd">&quot;&quot;&quot;</span>
82<span class="sd">       Create a model instance</span>
83<span class="sd">    &quot;&quot;&quot;</span>
84    <span class="n">obj</span> <span class="o">=</span> <span class="n">CoreShellModel</span><span class="p">()</span>
85    <span class="c"># CCoreShellModel.__init__(obj) is called by</span>
86    <span class="c"># the CoreShellModel constructor</span>
87    <span class="k">return</span> <span class="n">obj</span>
88</div>
89<div class="viewcode-block" id="CoreShellModel"><a class="viewcode-back" href="../../../dev/api/sas.models.html#sas.models.CoreShellModel.CoreShellModel">[docs]</a><span class="k">class</span> <span class="nc">CoreShellModel</span><span class="p">(</span><span class="n">CCoreShellModel</span><span class="p">,</span> <span class="n">BaseComponent</span><span class="p">):</span>
90    <span class="sd">&quot;&quot;&quot; </span>
91<span class="sd">    Class that evaluates a CoreShellModel model. </span>
92<span class="sd">    This file was auto-generated from src/sas/models/include/core_shell.h.</span>
93<span class="sd">    Refer to that file and the structure it contains</span>
94<span class="sd">    for details of the model.</span>
95<span class="sd">    </span>
96<span class="sd">    List of default parameters:</span>
97
98<span class="sd">    * radius          = 60.0 [A]</span>
99<span class="sd">    * scale           = 1.0 </span>
100<span class="sd">    * thickness       = 10.0 [A]</span>
101<span class="sd">    * core_sld        = 1e-06 [1/A^(2)]</span>
102<span class="sd">    * shell_sld       = 2e-06 [1/A^(2)]</span>
103<span class="sd">    * solvent_sld     = 3e-06 [1/A^(2)]</span>
104<span class="sd">    * background      = 0.0 [1/cm]</span>
105<span class="sd">    * M0_sld_shell    = 0.0 [1/A^(2)]</span>
106<span class="sd">    * M_theta_shell   = 0.0 [deg]</span>
107<span class="sd">    * M_phi_shell     = 0.0 [deg]</span>
108<span class="sd">    * M0_sld_core     = 0.0 [1/A^(2)]</span>
109<span class="sd">    * M_theta_core    = 0.0 [deg]</span>
110<span class="sd">    * M_phi_core      = 0.0 [deg]</span>
111<span class="sd">    * M0_sld_solv     = 0.0 [1/A^(2)]</span>
112<span class="sd">    * M_theta_solv    = 0.0 [deg]</span>
113<span class="sd">    * M_phi_solv      = 0.0 [deg]</span>
114<span class="sd">    * Up_frac_i       = 0.5 [u/(u+d)]</span>
115<span class="sd">    * Up_frac_f       = 0.5 [u/(u+d)]</span>
116<span class="sd">    * Up_theta        = 0.0 [deg]</span>
117
118<span class="sd">    &quot;&quot;&quot;</span>
119       
120    <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">multfactor</span><span class="o">=</span><span class="mi">1</span><span class="p">):</span>
121        <span class="sd">&quot;&quot;&quot; Initialization &quot;&quot;&quot;</span>
122        <span class="bp">self</span><span class="o">.</span><span class="n">__dict__</span> <span class="o">=</span> <span class="p">{}</span>
123       
124        <span class="c"># Initialize BaseComponent first, then sphere</span>
125        <span class="n">BaseComponent</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span>
126        <span class="c">#apply(CCoreShellModel.__init__, (self,)) </span>
127
128        <span class="n">CCoreShellModel</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span>
129        <span class="bp">self</span><span class="o">.</span><span class="n">is_multifunc</span> <span class="o">=</span> <span class="bp">False</span>
130                       
131        <span class="c">## Name of the model</span>
132        <span class="bp">self</span><span class="o">.</span><span class="n">name</span> <span class="o">=</span> <span class="s">&quot;CoreShellModel&quot;</span>
133        <span class="c">## Model description</span>
134        <span class="bp">self</span><span class="o">.</span><span class="n">description</span> <span class="o">=</span> <span class="s">&quot;&quot;&quot;</span>
135<span class="s">        Form factor for a monodisperse spherical particle with particle</span>
136<span class="s">                with a core-shell structure:</span>
137<span class="s">                </span>
138<span class="s">                The form factor is normalized by the</span>
139<span class="s">                total particle volume.</span>
140<span class="s">                </span>
141<span class="s">                radius: core radius, thickness: shell thickness</span>
142<span class="s">                </span>
143<span class="s">                Ref: Guinier, A. and G. Fournet,</span>
144<span class="s">                John Wiley and Sons, New York, 1955.</span>
145<span class="s">        &quot;&quot;&quot;</span>
146       
147        <span class="c">## Parameter details [units, min, max]</span>
148        <span class="bp">self</span><span class="o">.</span><span class="n">details</span> <span class="o">=</span> <span class="p">{}</span>
149        <span class="bp">self</span><span class="o">.</span><span class="n">details</span><span class="p">[</span><span class="s">&#39;radius&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;[A]&#39;</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">]</span>
150        <span class="bp">self</span><span class="o">.</span><span class="n">details</span><span class="p">[</span><span class="s">&#39;scale&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;&#39;</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">]</span>
151        <span class="bp">self</span><span class="o">.</span><span class="n">details</span><span class="p">[</span><span class="s">&#39;thickness&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;[A]&#39;</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">]</span>
152        <span class="bp">self</span><span class="o">.</span><span class="n">details</span><span class="p">[</span><span class="s">&#39;core_sld&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;[1/A^(2)]&#39;</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">]</span>
153        <span class="bp">self</span><span class="o">.</span><span class="n">details</span><span class="p">[</span><span class="s">&#39;shell_sld&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;[1/A^(2)]&#39;</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">]</span>
154        <span class="bp">self</span><span class="o">.</span><span class="n">details</span><span class="p">[</span><span class="s">&#39;solvent_sld&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;[1/A^(2)]&#39;</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">]</span>
155        <span class="bp">self</span><span class="o">.</span><span class="n">details</span><span class="p">[</span><span class="s">&#39;background&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;[1/cm]&#39;</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">]</span>
156        <span class="bp">self</span><span class="o">.</span><span class="n">details</span><span class="p">[</span><span class="s">&#39;M0_sld_shell&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;[1/A^(2)]&#39;</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">]</span>
157        <span class="bp">self</span><span class="o">.</span><span class="n">details</span><span class="p">[</span><span class="s">&#39;M_theta_shell&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;[deg]&#39;</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">]</span>
158        <span class="bp">self</span><span class="o">.</span><span class="n">details</span><span class="p">[</span><span class="s">&#39;M_phi_shell&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;[deg]&#39;</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">]</span>
159        <span class="bp">self</span><span class="o">.</span><span class="n">details</span><span class="p">[</span><span class="s">&#39;M0_sld_core&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;[1/A^(2)]&#39;</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">]</span>
160        <span class="bp">self</span><span class="o">.</span><span class="n">details</span><span class="p">[</span><span class="s">&#39;M_theta_core&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;[deg]&#39;</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">]</span>
161        <span class="bp">self</span><span class="o">.</span><span class="n">details</span><span class="p">[</span><span class="s">&#39;M_phi_core&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;[deg]&#39;</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">]</span>
162        <span class="bp">self</span><span class="o">.</span><span class="n">details</span><span class="p">[</span><span class="s">&#39;M0_sld_solv&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;[1/A^(2)]&#39;</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">]</span>
163        <span class="bp">self</span><span class="o">.</span><span class="n">details</span><span class="p">[</span><span class="s">&#39;M_theta_solv&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;[deg]&#39;</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">]</span>
164        <span class="bp">self</span><span class="o">.</span><span class="n">details</span><span class="p">[</span><span class="s">&#39;M_phi_solv&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;[deg]&#39;</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">]</span>
165        <span class="bp">self</span><span class="o">.</span><span class="n">details</span><span class="p">[</span><span class="s">&#39;Up_frac_i&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;[u/(u+d)]&#39;</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">]</span>
166        <span class="bp">self</span><span class="o">.</span><span class="n">details</span><span class="p">[</span><span class="s">&#39;Up_frac_f&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;[u/(u+d)]&#39;</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">]</span>
167        <span class="bp">self</span><span class="o">.</span><span class="n">details</span><span class="p">[</span><span class="s">&#39;Up_theta&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;[deg]&#39;</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">]</span>
168
169        <span class="c">## fittable parameters</span>
170        <span class="bp">self</span><span class="o">.</span><span class="n">fixed</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;thickness.width&#39;</span><span class="p">,</span>
171                      <span class="s">&#39;radius.width&#39;</span><span class="p">]</span>
172       
173        <span class="c">## non-fittable parameters</span>
174        <span class="bp">self</span><span class="o">.</span><span class="n">non_fittable</span> <span class="o">=</span> <span class="p">[]</span>
175       
176        <span class="c">## parameters with orientation</span>
177        <span class="bp">self</span><span class="o">.</span><span class="n">orientation_params</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;M0_sld_shell&#39;</span><span class="p">,</span>
178                                   <span class="s">&#39;M_theta_shell&#39;</span><span class="p">,</span>
179                                   <span class="s">&#39;M_phi_shell&#39;</span><span class="p">,</span>
180                                   <span class="s">&#39;M0_sld_core&#39;</span><span class="p">,</span>
181                                   <span class="s">&#39;M_theta_core&#39;</span><span class="p">,</span>
182                                   <span class="s">&#39;M_phi_core&#39;</span><span class="p">,</span>
183                                   <span class="s">&#39;M0_sld_solv&#39;</span><span class="p">,</span>
184                                   <span class="s">&#39;M_theta_solv&#39;</span><span class="p">,</span>
185                                   <span class="s">&#39;M_phi_solv&#39;</span><span class="p">,</span>
186                                   <span class="s">&#39;Up_frac_i&#39;</span><span class="p">,</span>
187                                   <span class="s">&#39;Up_frac_f&#39;</span><span class="p">,</span>
188                                   <span class="s">&#39;Up_theta&#39;</span><span class="p">]</span>
189
190        <span class="c">## parameters with magnetism</span>
191        <span class="bp">self</span><span class="o">.</span><span class="n">magnetic_params</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;M0_sld_shell&#39;</span><span class="p">,</span> <span class="s">&#39;M_theta_shell&#39;</span><span class="p">,</span> <span class="s">&#39;M_phi_shell&#39;</span><span class="p">,</span> <span class="s">&#39;M0_sld_core&#39;</span><span class="p">,</span> <span class="s">&#39;M_theta_core&#39;</span><span class="p">,</span> <span class="s">&#39;M_phi_core&#39;</span><span class="p">,</span> <span class="s">&#39;M0_sld_solv&#39;</span><span class="p">,</span> <span class="s">&#39;M_theta_solv&#39;</span><span class="p">,</span> <span class="s">&#39;M_phi_solv&#39;</span><span class="p">,</span> <span class="s">&#39;Up_frac_i&#39;</span><span class="p">,</span> <span class="s">&#39;Up_frac_f&#39;</span><span class="p">,</span> <span class="s">&#39;Up_theta&#39;</span><span class="p">]</span>
192
193        <span class="bp">self</span><span class="o">.</span><span class="n">category</span> <span class="o">=</span> <span class="bp">None</span>
194        <span class="bp">self</span><span class="o">.</span><span class="n">multiplicity_info</span> <span class="o">=</span> <span class="bp">None</span>
195       
196    <span class="k">def</span> <span class="nf">__setstate__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">state</span><span class="p">):</span>
197        <span class="sd">&quot;&quot;&quot;</span>
198<span class="sd">        restore the state of a model from pickle</span>
199<span class="sd">        &quot;&quot;&quot;</span>
200        <span class="bp">self</span><span class="o">.</span><span class="n">__dict__</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">params</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">dispersion</span> <span class="o">=</span> <span class="n">state</span>
201       
202    <span class="k">def</span> <span class="nf">__reduce_ex__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">proto</span><span class="p">):</span>
203        <span class="sd">&quot;&quot;&quot;</span>
204<span class="sd">        Overwrite the __reduce_ex__ of PyTypeObject *type call in the init of </span>
205<span class="sd">        c model.</span>
206<span class="sd">        &quot;&quot;&quot;</span>
207        <span class="n">state</span> <span class="o">=</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">__dict__</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">params</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">dispersion</span><span class="p">)</span>
208        <span class="k">return</span> <span class="p">(</span><span class="n">create_CoreShellModel</span><span class="p">,</span> <span class="nb">tuple</span><span class="p">(),</span> <span class="n">state</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">)</span>
209       
210<div class="viewcode-block" id="CoreShellModel.clone"><a class="viewcode-back" href="../../../dev/api/sas.models.html#sas.models.CoreShellModel.CoreShellModel.clone">[docs]</a>    <span class="k">def</span> <span class="nf">clone</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
211        <span class="sd">&quot;&quot;&quot; Return a identical copy of self &quot;&quot;&quot;</span>
212        <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_clone</span><span class="p">(</span><span class="n">CoreShellModel</span><span class="p">())</span>   
213        </div>
214<div class="viewcode-block" id="CoreShellModel.run"><a class="viewcode-back" href="../../../dev/api/sas.models.html#sas.models.CoreShellModel.CoreShellModel.run">[docs]</a>    <span class="k">def</span> <span class="nf">run</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">x</span><span class="o">=</span><span class="mf">0.0</span><span class="p">):</span>
215        <span class="sd">&quot;&quot;&quot; </span>
216<span class="sd">        Evaluate the model</span>
217<span class="sd">        </span>
218<span class="sd">        :param x: input q, or [q,phi]</span>
219<span class="sd">        </span>
220<span class="sd">        :return: scattering function P(q)</span>
221<span class="sd">        </span>
222<span class="sd">        &quot;&quot;&quot;</span>
223        <span class="k">return</span> <span class="n">CCoreShellModel</span><span class="o">.</span><span class="n">run</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">x</span><span class="p">)</span>
224   </div>
225<div class="viewcode-block" id="CoreShellModel.runXY"><a class="viewcode-back" href="../../../dev/api/sas.models.html#sas.models.CoreShellModel.CoreShellModel.runXY">[docs]</a>    <span class="k">def</span> <span class="nf">runXY</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">x</span><span class="o">=</span><span class="mf">0.0</span><span class="p">):</span>
226        <span class="sd">&quot;&quot;&quot; </span>
227<span class="sd">        Evaluate the model in cartesian coordinates</span>
228<span class="sd">        </span>
229<span class="sd">        :param x: input q, or [qx, qy]</span>
230<span class="sd">        </span>
231<span class="sd">        :return: scattering function P(q)</span>
232<span class="sd">        </span>
233<span class="sd">        &quot;&quot;&quot;</span>
234        <span class="k">return</span> <span class="n">CCoreShellModel</span><span class="o">.</span><span class="n">runXY</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">x</span><span class="p">)</span>
235        </div>
236<div class="viewcode-block" id="CoreShellModel.evalDistribution"><a class="viewcode-back" href="../../../dev/api/sas.models.html#sas.models.CoreShellModel.CoreShellModel.evalDistribution">[docs]</a>    <span class="k">def</span> <span class="nf">evalDistribution</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">x</span><span class="p">):</span>
237        <span class="sd">&quot;&quot;&quot; </span>
238<span class="sd">        Evaluate the model in cartesian coordinates</span>
239<span class="sd">        </span>
240<span class="sd">        :param x: input q[], or [qx[], qy[]]</span>
241<span class="sd">        </span>
242<span class="sd">        :return: scattering function P(q[])</span>
243<span class="sd">        </span>
244<span class="sd">        &quot;&quot;&quot;</span>
245        <span class="k">return</span> <span class="n">CCoreShellModel</span><span class="o">.</span><span class="n">evalDistribution</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">x</span><span class="p">)</span>
246        </div>
247<div class="viewcode-block" id="CoreShellModel.calculate_ER"><a class="viewcode-back" href="../../../dev/api/sas.models.html#sas.models.CoreShellModel.CoreShellModel.calculate_ER">[docs]</a>    <span class="k">def</span> <span class="nf">calculate_ER</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
248        <span class="sd">&quot;&quot;&quot; </span>
249<span class="sd">        Calculate the effective radius for P(q)*S(q)</span>
250<span class="sd">        </span>
251<span class="sd">        :return: the value of the effective radius</span>
252<span class="sd">        </span>
253<span class="sd">        &quot;&quot;&quot;</span>       
254        <span class="k">return</span> <span class="n">CCoreShellModel</span><span class="o">.</span><span class="n">calculate_ER</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span>
255        </div>
256<div class="viewcode-block" id="CoreShellModel.calculate_VR"><a class="viewcode-back" href="../../../dev/api/sas.models.html#sas.models.CoreShellModel.CoreShellModel.calculate_VR">[docs]</a>    <span class="k">def</span> <span class="nf">calculate_VR</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
257        <span class="sd">&quot;&quot;&quot; </span>
258<span class="sd">        Calculate the volf ratio for P(q)*S(q)</span>
259<span class="sd">        </span>
260<span class="sd">        :return: the value of the volf ratio</span>
261<span class="sd">        </span>
262<span class="sd">        &quot;&quot;&quot;</span>       
263        <span class="k">return</span> <span class="n">CCoreShellModel</span><span class="o">.</span><span class="n">calculate_VR</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span>
264              </div>
265<div class="viewcode-block" id="CoreShellModel.set_dispersion"><a class="viewcode-back" href="../../../dev/api/sas.models.html#sas.models.CoreShellModel.CoreShellModel.set_dispersion">[docs]</a>    <span class="k">def</span> <span class="nf">set_dispersion</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">parameter</span><span class="p">,</span> <span class="n">dispersion</span><span class="p">):</span>
266        <span class="sd">&quot;&quot;&quot;</span>
267<span class="sd">        Set the dispersion object for a model parameter</span>
268<span class="sd">        </span>
269<span class="sd">        :param parameter: name of the parameter [string]</span>
270<span class="sd">        :param dispersion: dispersion object of type DispersionModel</span>
271<span class="sd">        </span>
272<span class="sd">        &quot;&quot;&quot;</span>
273        <span class="k">return</span> <span class="n">CCoreShellModel</span><span class="o">.</span><span class="n">set_dispersion</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span>
274               <span class="n">parameter</span><span class="p">,</span> <span class="n">dispersion</span><span class="o">.</span><span class="n">cdisp</span><span class="p">)</span>
275       
276   
277<span class="c"># End of file</span>
278</pre></div></div></div>
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