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| 51 | <h1>Source code for sas.models.PowerLawAbsModel</h1><div class="highlight"><pre> |
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| 52 | <span class="sd">""" </span> |
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| 53 | <span class="sd"> Provide F(x) = scale* (\|x\|)^(-m) + bkd</span> |
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| 54 | <span class="sd"> Power law function as a BaseComponent model</span> |
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| 55 | <span class="sd">"""</span> |
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| 56 | <span class="kn">from</span> <span class="nn">sas.models.PowerLawModel</span> <span class="kn">import</span> <span class="n">PowerLawModel</span> |
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| 57 | <span class="kn">import</span> <span class="nn">math</span> |
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| 58 | |
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| 59 | <div class="viewcode-block" id="PowerLawAbsModel"><a class="viewcode-back" href="../../../dev/api/sas.models.html#sas.models.PowerLawAbsModel.PowerLawAbsModel">[docs]</a><span class="k">class</span> <span class="nc">PowerLawAbsModel</span><span class="p">(</span><span class="n">PowerLawModel</span><span class="p">):</span> |
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| 60 | <span class="sd">"""</span> |
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| 61 | <span class="sd"> Class that evaluates a absolute Power_Law model. ::</span> |
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| 62 | <span class="sd"> </span> |
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| 63 | <span class="sd"> F(x) = scale* (|x|)^(-m) + bkd</span> |
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| 64 | <span class="sd"> </span> |
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| 65 | <span class="sd"> The model has three parameters:</span> |
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| 66 | |
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| 67 | <span class="sd"> * m = power</span> |
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| 68 | <span class="sd"> * scale = scale factor</span> |
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| 69 | <span class="sd"> * bkd = incoherent background</span> |
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| 70 | <span class="sd"> """</span> |
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| 71 | |
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| 72 | <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
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| 73 | <span class="sd">""" Initialization """</span> |
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| 74 | <span class="c"># Initialize PowerLawAbsModel </span> |
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| 75 | <span class="n">PowerLawModel</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> |
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| 76 | <span class="c">## Name of the model</span> |
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| 77 | <span class="bp">self</span><span class="o">.</span><span class="n">name</span> <span class="o">=</span> <span class="s">"Absolute Power_Law"</span> |
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| 78 | <span class="bp">self</span><span class="o">.</span><span class="n">description</span> <span class="o">=</span> <span class="s">""" The Power_Law model.</span> |
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| 79 | <span class="s"> F(x) = scale* (|x|)^(-m) + bkd</span> |
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| 80 | <span class="s"> </span> |
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| 81 | <span class="s"> The model has three parameters: </span> |
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| 82 | <span class="s"> m = power</span> |
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| 83 | <span class="s"> scale = scale factor</span> |
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| 84 | <span class="s"> bkd = incoherent background"""</span> |
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| 85 | |
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| 86 | |
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| 87 | <span class="k">def</span> <span class="nf">_PowerLaw</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">x</span><span class="p">):</span> |
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| 88 | <span class="k">return</span> <span class="n">PowerLawModel</span><span class="o">.</span><span class="n">_PowerLaw</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">math</span><span class="o">.</span><span class="n">fabs</span><span class="p">(</span><span class="n">x</span><span class="p">))</span> |
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