Hi, I got a little problem and I hoped someone can help me out.
When I have a matrix consisting of 3 columns, I want to replace a value in the third column if a row in the first column has a certain value. For example, I have the following matrix:
Lets call the first column x, the second y and the third z. Now what I want is that when x == 3, than z must become 20.
How can I do this?