How to normalize Pearson Correlation between 0 and 1?

Question

I came across the formula for the Pearson Correlation but it gives values between -1 and 1. How would I modify the formula so that it gives values between 0 and 1?

Answer 1

To normalize any set of numbers to be between 0 and 1, subtract the minimum and divide by the range.

In your case the min is -1 and the range is 2, so if a value in your set is -0.5, that value becomes:

(-0.5 - (-1)) / 2

= 0.25