Remove negative numbers

Hi all!

So I've been using MatLab for all of about two days and I already need some help. I have a matrix which contains both positive and negative numbers and I want to remove the negative numbers by adding the absolute value of the most negative number to all of the numbers in the matrix. I don't know the value of the most negative number beforehand, so I can't just hardcode it.

ie. Matrix A becomes Matrix B: A = [4 0 -6 -3], B = [10 6 0 3]

Is there an easy one-step solution for this? Or do I need to find the min value first, get the absolute value and then add it to all the matrix values?

Thank you!

Answer 1

[Walter Roberson]

B = A - min(0, min(A(:)));

This code protects against the possibility that none of the entries in A are negative, leaving all the values unchanged in that situation.

Answer 2

[the cyclist]

If you are sure there is at least one negative number in A, this will work:

B = A - min(A);