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conrad
2022-03-31 13:53:11 +10:00
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@@ -8566,21 +8566,13 @@ See also:
<a name="cond"></a>
<b>cond( A )</b>
<ul>
<li>
Return the condition number of matrix <i>A</i> (the ratio of the largest singular value to the smallest)
</li>
<li>Return the condition number of matrix <i>A</i> (the ratio of the largest singular value to the smallest)</li>
<br>
<li>
Large condition numbers suggest that matrix <i>A</i> is nearly singular
</li>
<li>The ideal condition number is close to 1; large condition numbers suggest that matrix <i>A</i> is nearly singular</li>
<br>
<li>
The computation is based on singular value decomposition; if the decomposition fails, a <i>std::runtime_error</i> exception is thrown
</li>
<li>The computation is based on singular value decomposition; if the decomposition fails, a <i>std::runtime_error</i> exception is thrown</li>
<br>
<li>
<b>Caveat:</b> <a href="#rcond">rcond()</a> is considerably faster for providing an estimate of the reciprocal condition number
</li>
<li><b>Caveat:</b> <a href="#rcond">rcond()</a> is considerably faster for providing an estimate of the reciprocal condition number</li>
<br>
<li>
Examples: