kernel, null space
W=kernel(A [,tol,[,flag])
full real or complex matrix or real sparse matrix
character string 'svd'
(default) or 'qr'
real number
full column rank matrix
W=kernel(A)
returns the kernel (null space) of A
, and size(W,2)
is the nullity 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).