📄 hesschek.htm
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<html><head><title>Netlab Reference Manual hesschek</title></head><body><H1> hesschek</H1><h2>Purpose</h2>Use central differences to confirm correct evaluation of Hessian matrix.<p><h2>Synopsis</h2><PRE>hesschek(net, x, t)h = hesschek(net, x, t)</PRE><p><h2>Description</h2><p><CODE>hesschek(net, x, t)</CODE> takes a network data structure <CODE>net</CODE>, togetherwith input and target data matrices <CODE>x</CODE> and <CODE>t</CODE>, and comparesthe evaluation of the Hessian matrix using the function <CODE>nethess</CODE>and using central differences with the function <CODE>neterr</CODE>.<p>The optional return value <CODE>h</CODE> is the Hessian computed using<CODE>nethess</CODE>.<p><h2>See Also</h2><CODE><a href="nethess.htm">nethess</a></CODE>, <CODE><a href="neterr.htm">neterr</a></CODE><hr><b>Pages:</b><a href="index.htm">Index</a><hr><p>Copyright (c) Ian T Nabney (1996-9)</body></html>⌨️ 快捷键说明
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