How to normalize / denormalize a vector to range [-1;1]

Question

How can I normalize a vector to the range [-1;1]

I would like to use function norm, because it will be faster.

Also let me

Answer 1

A simple solution is using ready MATLAB function :

mapminmax

Process matrices by mapping row minimum and maximum values to [-1 1]

Example :

x1 = [1 2 4; 1 1 1; 3 2 2; 0 0 0]
[y1,PS] = mapminmax(x1)

Denormalize that vector after normalization

x1_again = mapminmax('reverse',y1,PS)