Generating a definite matrix

Hello,

I am unable to find the code of generating the matrix A=[1 0 0 0

1 2 0 0

1 2 3 0

1 2 3 4].

Can anyone please help me finding the right code for finding it?

[Rik]

What do you mean? Pasting that into Matlab should already create that matrix.

Answer 1

[Walter Roberson]

tril(repmat(1:4, 4, 1))