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annotate toolboxes/FullBNT-1.0.7/netlab3.3/linef.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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wolffd@0 1 function y = linef(lambda, fn, x, d, varargin)
wolffd@0 2 %LINEF Calculate function value along a line.
wolffd@0 3 %
wolffd@0 4 % Description
wolffd@0 5 % LINEF(LAMBDA, FN, X, D) calculates the value of the function FN at
wolffd@0 6 % the point X+LAMBDA*D. Here X is a row vector and LAMBDA is a scalar.
wolffd@0 7 %
wolffd@0 8 % LINEF(LAMBDA, FN, X, D, P1, P2, ...) allows additional arguments to
wolffd@0 9 % be passed to FN(). This function is used for convenience in some of
wolffd@0 10 % the optimisation routines.
wolffd@0 11 %
wolffd@0 12 % See also
wolffd@0 13 % GRADCHEK, LINEMIN
wolffd@0 14 %
wolffd@0 15
wolffd@0 16 % Copyright (c) Ian T Nabney (1996-2001)
wolffd@0 17
wolffd@0 18 % Check function string
wolffd@0 19 fn = fcnchk(fn, length(varargin));
wolffd@0 20
wolffd@0 21 y = feval(fn, x+lambda.*d, varargin{:});