File: rank_est.m

package info (click to toggle)
suitesparse 1%3A5.12.0%2Bdfsg-2
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 176,720 kB
  • sloc: ansic: 1,193,914; cpp: 31,704; makefile: 6,638; fortran: 1,927; java: 1,826; csh: 765; ruby: 725; sh: 529; python: 333; perl: 225; sed: 164; awk: 35
file content (8 lines) | stat: -rw-r--r-- 224 bytes parent folder | download | duplicates (5) 
1
2
3
4
5
6
7
8
 
function r = rank_est (R, m, n, tol)
%RANK_EST computes a cheap estimate of the rank of a triangular matrix
d = abs (get_diag (R)) ;
if (nargin < 4 || tol < 0)
    tol = 20 * (m+n) * eps (max (d)) ;
end
r = sum (d > tol) ;