Creating a matrix where the entry in the second column is (weakly) less than the entry in the first column

Hello,

I would like to create a matrix where the entry in the second column is less than the entry in the first column:

A 
= [ 1 0; 
    1 1;
    2 0;
    2 1;
    2 2]

I can write loops but I would think there should be more efficient way. Please advise.

[the cyclist]

You haven't been specific enough. For example, would this be OK?

A = rand(5,1);
A(:,2) = A(:,1) - pi;

I expect not.

Answer 1

[Image Analyst]

This will do it (one of an infinite number of ways):

A(:, 2) = A(:, 1) - 1