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comparison toolboxes/FullBNT-1.0.7/nethelp3.3/hesschek.htm @ 0:e9a9cd732c1e tip
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| author | wolffd |
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| date | Tue, 10 Feb 2015 15:05:51 +0000 |
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| 1 <html> | |
| 2 <head> | |
| 3 <title> | |
| 4 Netlab Reference Manual hesschek | |
| 5 </title> | |
| 6 </head> | |
| 7 <body> | |
| 8 <H1> hesschek | |
| 9 </H1> | |
| 10 <h2> | |
| 11 Purpose | |
| 12 </h2> | |
| 13 Use central differences to confirm correct evaluation of Hessian matrix. | |
| 14 | |
| 15 <p><h2> | |
| 16 Synopsis | |
| 17 </h2> | |
| 18 <PRE> | |
| 19 hesschek(net, x, t) | |
| 20 h = hesschek(net, x, t)</PRE> | |
| 21 | |
| 22 | |
| 23 <p><h2> | |
| 24 Description | |
| 25 </h2> | |
| 26 | |
| 27 <p><CODE>hesschek(net, x, t)</CODE> takes a network data structure <CODE>net</CODE>, together | |
| 28 with input and target data matrices <CODE>x</CODE> and <CODE>t</CODE>, and compares | |
| 29 the evaluation of the Hessian matrix using the function <CODE>nethess</CODE> | |
| 30 and using central differences with the function <CODE>neterr</CODE>. | |
| 31 | |
| 32 <p>The optional return value <CODE>h</CODE> is the Hessian computed using | |
| 33 <CODE>nethess</CODE>. | |
| 34 | |
| 35 <p><h2> | |
| 36 See Also | |
| 37 </h2> | |
| 38 <CODE><a href="nethess.htm">nethess</a></CODE>, <CODE><a href="neterr.htm">neterr</a></CODE><hr> | |
| 39 <b>Pages:</b> | |
| 40 <a href="index.htm">Index</a> | |
| 41 <hr> | |
| 42 <p>Copyright (c) Ian T Nabney (1996-9) | |
| 43 | |
| 44 | |
| 45 </body> | |
| 46 </html> |