How can I create a triangular matrix based on a vector, in MATLAB?

Question

Let\'s say I\'ve got a vector like this one:

A = [101:105]

Which is really:

[ 101, 102, 103, 104, 105 ]

And I

Answer 1

The way I'd go about it is to create a matrix A:

101 102 103 104 105
101 102 103 104 105
101 102 103 104 105
101 102 103 104 105
101 102 103 104 105

And then find a matrix B such that when you multiply A*B you'll get the result you want. Basically do the linear algebra on paper first and then have Matlab do the calculation.