If there is a 5 by 3 matrix H ,i can use SVD to find the null space of H.But i find there is a "null "command,which can help me to find Null space of matrix.
At first ,i thought the result of using SVD command and null command will be the same,however,it is not.
H = randn(5,3)
[UA,SA,VA] = svd(H)
The window show me svddA is a 5 by 1 matrix,however.
nuA show me Empty matrix: 3-by-0
Why?what is different between them?