# hesschek

## Purpose

Use central differences to confirm correct evaluation of Hessian matrix.

## Synopsis

    hesschek(net, x, t)
    h = hesschek(net, x, t)

## Description

`hesschek(net, x, t)` takes a network data structure `net`, together with input and target data matrices `x` and `t`, and compares the evaluation of the Hessian matrix using the function `nethess` and using central differences with the function `neterr`.

The optional return value `h` is the Hessian computed using `nethess`.

## See Also

`nethess`, `neterr`

Pages: Index

Copyright (c) Ian T Nabney (1996-9)