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56  <div class="section" id="smearing-2d">
57<h1>smearing_2d<a class="headerlink" href="#smearing-2d" title="Permalink to this headline">¶</a></h1>
58<div class="section" id="module-DataLoader.smearing_2d">
59<span id="dataloader-smearing-2d"></span><h2><a class="reference internal" href="#module-DataLoader.smearing_2d"><tt class="xref py py-mod docutils literal"><span class="pre">DataLoader.smearing_2d</span></tt></a><a class="headerlink" href="#module-DataLoader.smearing_2d" title="Permalink to this headline">¶</a></h2>
60<dl class="class">
61<dt id="DataLoader.smearing_2d.Smearer2D">
62<em class="property">class </em><tt class="descclassname">DataLoader.smearing_2d.</tt><tt class="descname">Smearer2D</tt><big>(</big><em>data=None</em>, <em>model=None</em>, <em>index=None</em>, <em>limit=2.5</em>, <em>accuracy='Low'</em><big>)</big><a class="headerlink" href="#DataLoader.smearing_2d.Smearer2D" title="Permalink to this definition">¶</a></dt>
63<dd><p>Gaussian Q smearing class for SANS 2d data</p>
64<dl class="method">
65<dt id="DataLoader.smearing_2d.Smearer2D.get_data">
66<tt class="descname">get_data</tt><big>(</big><big>)</big><a class="headerlink" href="#DataLoader.smearing_2d.Smearer2D.get_data" title="Permalink to this definition">¶</a></dt>
67<dd>get qx_data, qy_data, dqx_data,dqy_data,and calculate phi_data=arctan(qx_data/qy_data)</dd></dl>
68
69<dl class="method">
70<dt id="DataLoader.smearing_2d.Smearer2D.get_value">
71<tt class="descname">get_value</tt><big>(</big><big>)</big><a class="headerlink" href="#DataLoader.smearing_2d.Smearer2D.get_value" title="Permalink to this definition">¶</a></dt>
72<dd><p>Over sampling of r_nbins times phi_nbins, calculate Gaussian weights, then find smeared intensity
73For the default values, this is equivalent (but by using numpy array
74the speed optimized by a factor of ten)to the following:</p>
75<div class="highlight-python"><pre>Remove the singular points if exists
76self.dqx_data[self.dqx_data==0]=SIGMA_ZERO
77self.dqy_data[self.dqy_data==0]=SIGMA_ZERO
78
79for phi in range(0,4):
80    for r in range(0,5):
81        n = (phi)*5+(r)
82        r = r+0.25
83        dphi = phi*2.0*math.pi/4.0 + numpy.arctan(self.qy_data[index_model]/self.dqy_data[index_model]/self.qx_data[index_model]*/self.dqx_data[index_model])
84        dq = r*sqrt( self.dqx_data[index_model]*self.dqx_data[index_model]                         + self.dqy_data[index_model]*self.dqy_data[index_model] )
85        #integrant of exp(-0.5*r*r) r dr at each bins : The integration may not need.
86        weight_res[n] = e^{(-0.5*((r-0.25)*(r-0.25)))}- e^{(-0.5*((r-0.25)*(r-0.25)))}
87        #if phi != 0 and r != 0:
88        qx_res = numpy.append(qx_res,self.qx_data[index_model]+ dq * cos(dphi))
89        qy_res = numpy.append(qy_res,self.qy_data[index_model]+ dq * sin(dphi))</pre>
90</div>
91<p>Then compute I(qx_res,qy_res) and do weighted averaging.</p>
92</dd></dl>
93
94<dl class="method">
95<dt id="DataLoader.smearing_2d.Smearer2D.set_accuracy">
96<tt class="descname">set_accuracy</tt><big>(</big><em>accuracy='Low'</em><big>)</big><a class="headerlink" href="#DataLoader.smearing_2d.Smearer2D.set_accuracy" title="Permalink to this definition">¶</a></dt>
97<dd><p>Set accuracy.</p>
98<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">Parameters:</th><td class="field-body"><ul class="first last simple">
103<li><strong>accuracy</strong> &#8211; string</li>
104</ul>
105</td>
106</tr>
107</tbody>
108</table>
109</dd></dl>
110
111<dl class="method">
112<dt id="DataLoader.smearing_2d.Smearer2D.set_data">
113<tt class="descname">set_data</tt><big>(</big><em>data=None</em><big>)</big><a class="headerlink" href="#DataLoader.smearing_2d.Smearer2D.set_data" title="Permalink to this definition">¶</a></dt>
114<dd><p>Set data.</p>
115<table class="docutils field-list" frame="void" rules="none">
116<col class="field-name" />
117<col class="field-body" />
118<tbody valign="top">
119<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
120<li><strong>data</strong> &#8211; DataLoader.Data_info type</li>
121</ul>
122</td>
123</tr>
124</tbody>
125</table>
126</dd></dl>
127
128<dl class="method">
129<dt id="DataLoader.smearing_2d.Smearer2D.set_index">
130<tt class="descname">set_index</tt><big>(</big><em>index=None</em><big>)</big><a class="headerlink" href="#DataLoader.smearing_2d.Smearer2D.set_index" title="Permalink to this definition">¶</a></dt>
131<dd><p>Set index.</p>
132<table class="docutils field-list" frame="void" rules="none">
133<col class="field-name" />
134<col class="field-body" />
135<tbody valign="top">
136<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
137<li><strong>index</strong> &#8211; 1d arrays</li>
138</ul>
139</td>
140</tr>
141</tbody>
142</table>
143</dd></dl>
144
145<dl class="method">
146<dt id="DataLoader.smearing_2d.Smearer2D.set_model">
147<tt class="descname">set_model</tt><big>(</big><em>model=None</em><big>)</big><a class="headerlink" href="#DataLoader.smearing_2d.Smearer2D.set_model" title="Permalink to this definition">¶</a></dt>
148<dd><p>Set model.</p>
149<table class="docutils field-list" frame="void" rules="none">
150<col class="field-name" />
151<col class="field-body" />
152<tbody valign="top">
153<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
154<li><strong>model</strong> &#8211; sans.models instance</li>
155</ul>
156</td>
157</tr>
158</tbody>
159</table>
160</dd></dl>
161
162<dl class="method">
163<dt id="DataLoader.smearing_2d.Smearer2D.set_smearer">
164<tt class="descname">set_smearer</tt><big>(</big><em>smearer=True</em><big>)</big><a class="headerlink" href="#DataLoader.smearing_2d.Smearer2D.set_smearer" title="Permalink to this definition">¶</a></dt>
165<dd><p>Set whether or not smearer will be used</p>
166<table class="docutils field-list" frame="void" rules="none">
167<col class="field-name" />
168<col class="field-body" />
169<tbody valign="top">
170<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
171<li><strong>smearer</strong> &#8211; smear object</li>
172</ul>
173</td>
174</tr>
175</tbody>
176</table>
177</dd></dl>
178
179</dd></dl>
180
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