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class=md-nav__link >Changelog</a> </ul> </nav> </div> </div> </div> <div class="md-sidebar md-sidebar--secondary" data-md-component=toc > <div class=md-sidebar__scrollwrap > <div class=md-sidebar__inner > <nav class="md-nav md-nav--secondary"> <ul class=md-nav__list data-md-scrollfix=""> </ul> </nav> </div> </div> </div> <div class=md-content > <article class="md-content__inner md-typeset" role=main > <section class="tex2jax_ignore mathjax_ignore" id=powdercalibrationfitsigma > <h1 id=python-client-docs-powdercalibrationfitsigma--page-root >PowderCalibrationFitSigma<a class=headerlink href="#python-client-docs-powdercalibrationfitsigma--page-root" title="Link to this heading"></a></h1> <p>What the powder ring fit knows about its own answer, from the covariance of the converged problem. Each sigma is in its parameter’s own unit and is scaled by the residual scatter of that fit, so it is the usual “how far could this move before the fit got visibly worse”. The two correlations are the ones that matter: a tilt and a beam-centre shift both displace a ring’s radius as cos(phi) and are told apart only by how that amplitude grows with the ring’s radius, so as the rings run out the pair stops being separable and these approach 1. The rotation sigmas and the correlations are absent when the tilt was not a free parameter.</p> <section id=properties > <h2 id=properties >Properties<a class=headerlink href="#properties" title="Link to this heading"></a></h2> <table> <thead> <tr class=row-odd ><th class=head ><p>Name</p> <th class=head ><p>Type</p> <th class=head ><p>Description</p> <th class=head ><p>Notes</p> <tr class=row-even ><td><p><strong>beam_x_pxl</strong></p> <td><p><strong>float</strong></p> <td><p>Standard error of the fitted PONI x [pixels]</p> <td><p>[optional]</p> <tr class=row-odd ><td><p><strong>beam_y_pxl</strong></p> <td><p><strong>float</strong></p> <td><p>Standard error of the fitted PONI y [pixels]</p> <td><p>[optional]</p> <tr class=row-even ><td><p><strong>detector_distance_mm</strong></p> <td><p><strong>float</strong></p> <td><p>Standard error of the fitted detector distance [mm]</p> <td><p>[optional]</p> <tr class=row-odd ><td><p><strong>poni_rot1_rad</strong></p> <td><p><strong>float</strong></p> <td><p>Standard error of the fitted rot1 [rad]</p> <td><p>[optional]</p> <tr class=row-even ><td><p><strong>poni_rot2_rad</strong></p> <td><p><strong>float</strong></p> <td><p>Standard error of the fitted rot2 [rad]</p> <td><p>[optional]</p> <tr class=row-odd ><td><p><strong>correlation_beam_x_rot1</strong></p> <td><p><strong>float</strong></p> <td><p>Correlation between the fitted PONI x and rot1, -1 to 1</p> <td><p>[optional]</p> <tr class=row-even ><td><p><strong>correlation_beam_y_rot2</strong></p> <td><p><strong>float</strong></p> <td><p>Correlation between the fitted PONI y and rot2, -1 to 1</p> <td><p>[optional]</p> </table> </section> <section id=example > <h2 id=example >Example<a class=headerlink href="#example" title="Link to this heading"></a></h2> <div class="highlight-python notranslate"><div class=highlight ><pre><span></span><span class=kn >from</span> <span class=nn >jfjoch_client.models.powder_calibration_fit_sigma</span> <span class=kn >import</span> <span class=n >PowderCalibrationFitSigma</span>
<span class=c1 ># TODO update the JSON string below</span>
<span class=n >json</span> <span class=o >=</span> <span class=s2 >"</span><span class=si >{}</span><span class=s2 >"</span>
<span class=c1 ># create an instance of PowderCalibrationFitSigma from a JSON string</span>
<span class=n >powder_calibration_fit_sigma_instance</span> <span class=o >=</span> <span class=n >PowderCalibrationFitSigma</span><span class=o >.</span><span class=n >from_json</span><span class=p >(</span><span class=n >json</span><span class=p >)</span>
<span class=c1 ># print the JSON string representation of the object</span>
<span class=nb >print</span><span class=p >(</span><span class=n >PowderCalibrationFitSigma</span><span class=o >.</span><span class=n >to_json</span><span class=p >())</span>
<span class=c1 ># convert the object into a dict</span>
<span class=n >powder_calibration_fit_sigma_dict</span> <span class=o >=</span> <span class=n >powder_calibration_fit_sigma_instance</span><span class=o >.</span><span class=n >to_dict</span><span class=p >()</span>
<span class=c1 ># create an instance of PowderCalibrationFitSigma from a dict</span>
<span class=n >powder_calibration_fit_sigma_from_dict</span> <span class=o >=</span> <span class=n >PowderCalibrationFitSigma</span><span class=o >.</span><span class=n >from_dict</span><span class=p >(</span><span class=n >powder_calibration_fit_sigma_dict</span><span class=p >)</span>
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