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comparison scripts/general/isdefinite.m @ 5642:2618a0750ae6

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[project @ 2006-03-06 21:26:48 by jwe]
author jwe
date Mon, 06 Mar 2006 21:26:54 +0000
parents 4c8a2e4e0717
children 34f96dd5441b
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5641:eb998631a4aa 5642:2618a0750ae6
20 ## -*- texinfo -*- 20 ## -*- texinfo -*-
21 ## @deftypefn {Function File} {} isdefinite (@var{x}, @var{tol}) 21 ## @deftypefn {Function File} {} isdefinite (@var{x}, @var{tol})
22 ## Return 1 if @var{x} is symmetric positive definite within the 22 ## Return 1 if @var{x} is symmetric positive definite within the
23 ## tolerance specified by @var{tol} or 0 if @var{x} is symmetric 23 ## tolerance specified by @var{tol} or 0 if @var{x} is symmetric
24 ## positive semidefinite. Otherwise, return -1. If @var{tol} 24 ## positive semidefinite. Otherwise, return -1. If @var{tol}
25 ## is omitted, use a tolerance equal to 100 times the machine precision. 25 ## is omitted, use a tolerance equal to 100 times the machine precision.
26 ## @seealso{issymmetric}
26 ## @end deftypefn 27 ## @end deftypefn
27 ##
28 ## @seealso{issymmetric}
29 28
30 ## Author: Gabriele Pannocchia <g.pannocchia@ing.unipi.it> 29 ## Author: Gabriele Pannocchia <g.pannocchia@ing.unipi.it>
31 ## Created: November 2003 30 ## Created: November 2003
32 ## Adapted-By: jwe 31 ## Adapted-By: jwe
33 32