Name
kernel — kernel, nullspace
Calling Sequence
W=kernel(A [,tol,[,flag])
Parameters
- A
full real or complex matrix or real sparse matrix
- flag
character string 'svd' (default) or 'qr'
- tol
real number
- W
full column rank matrix
Description
W=kernel(A) returns the kernel (nullspace) of A. If A has full column rank then an empty matrix [] is returned.
flag and tol are optional parameters: flag = 'qr'
or 'svd' (default is 'svd').
tol = tolerance parameter (of order %eps as default value).
Examples
A=rand(3,1)*rand(1,3);
A*kernel(A)
A=sparse(A);
clean(A*kernel(A))