colcomp(1)

NAME
colcomp - column compression, kernel, nullspace

CALLING SEQUENCE
[W,rk]=colcomp(A [,flag,tol])

PARAMETERS

A   : real or complex matrix

flag
    : character string

tol : real number

W   : square non-singular matrix (change of basis)

rk  : integer (rank of A)

DESCRIPTION
Column compression of A: Ac = A*W is column compressed i.e

Ac=[0,Af] with Af full column rank, rank(Af) = rank(A) = rk.

flag and tol are optional parameters: flag = 'qr' or 'svd' (default is 'svd').

tol = tolerance parameter (of order %eps as default value).

The ma-rk first columns of W span the kernel of A when size(A)=(na,ma)

SEE ALSO
rowcomp, fullrf, fullrfk, kernel

AUTHOR
F.D.