 function. It returns a range length of “x” values within region of positive probability.</li>
<li>New functions <code><a href="../reference/form_recenter.html">form_recenter()</a></code> and <code><a href="../reference/form_recenter.html">form_respread()</a></code> are implemented. They change center and spread of distribution (with linear transformation) to be equal to some desired value.</li>
</ul>
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