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view toolboxes/FullBNT-1.0.7/netlab3.3/rosen.m @ 0:e9a9cd732c1e tip

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first hg version after svn
author wolffd
date Tue, 10 Feb 2015 15:05:51 +0000
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function y = rosen(x)
%ROSEN	Calculate Rosenbrock's function.
%
%	Description
%	Y = ROSEN(X) computes the value of Rosenbrock's function at each row
%	of X, which should have two columns.
%
%	See also
%	DEMOPT1, ROSEGRAD
%

%	Copyright (c) Ian T Nabney (1996-2001)

% Calculate value of Rosenbrock's function: x should be nrows by 2 columns

y = 100 * ((x(:,2) - x(:,1).^2).^2) + (1.0 - x(:,1)).^2;