How to Normalize 3D array with negative and positive values to values between -1 and 1?

Hi all

In order to be able to do some upcoming calculations, I need to normalize a 3D array to values between -1 and 1. The array (i.e.: 61 x 61 x 6) has values that can be negative and/or positive. Is there a fast way to normalize this complete array to values between -1 and 1, where -1 is the most negative value and +1 the largest positive value?

Actually I want to map the most negative number to -1 and the largest positive number to 1, and have all the numbers in between scale between them so the relations keep the same...

Greetings

Daan

Answer 1

[Star Strider]

One approach:

A = randn(4, 4, 2)                              % Create Data
Amax = max(A(:));
Amin = min(A(:));
Range = Amax - Amin;
Anrm = ((A - Amin)/Range - 0.5) * 2;            % Desired Result