MATLAB: How to find a matrix which is orthogonal to another matrix

Question

I have a matrix A, and want to find the matrix B which is orthogonal to A. How can I do it in Matlab?

e.g.  A=[1,2;2,3;3,4]

Thank you in advance!

Answer 1

Dear all,

I found the solution. It's called "orthogonal complement". The code here should be

null(alpha','r')

Thank all of your contributions!

Best wishes,

Yang