Transform a matrix in a special way

Hi !

I have this kind of matrix :

A=[1 2 3 4 5 6 7 8 9 10]

And I would like to transform it in this way:

B=[0 1 2 3 4 ; 0 0 5 6 7 ; 0 0 0 8 9 ; 0 0 0 0 10 ; 0 0 0 0 0]

I am looking for a simple method to do it, may you help me please ?

Answer 1

[Walter Roberson]

fiddle with

B = zeros(5)
B(tril(B,-1)==1) = A;

I posted exact code about two weeks ago. Needs a couple of flips.

Answer 2

[Fangjun Jiang]

B=zeros(5);
B(tril(true(5),-1))=A
B=B'