Home > freetb4matlab > linear-algebra > rank.m

rank

PURPOSE ^

% Compute the rank of @var{a}, using the singular value decomposition.

SYNOPSIS ^

function retval = rank (A, tol)

DESCRIPTION ^

% -*- texinfo -*-
% @deftypefn {Function File} {} rank (@var{a}, @var{tol})
% Compute the rank of @var{a}, using the singular value decomposition.
% The rank is taken to be the number of singular values of @var{a} that
% are greater than the specified tolerance @var{tol}.  If the second
% argument is omitted, it is taken to be
%
% @example
% tol = max (size (@var{a})) * sigma(1) * eps;
% @end example
%
% @noindent
% where @code{eps} is machine precision and @code{sigma(1)} is the largest
% singular value of @var{a}.
% @end deftypefn

CROSS-REFERENCE INFORMATION ^

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