Normalization of matrix column

I have a matrix say 3x4. I want to normalize each column. Each column has its maximum and minimum value.

i want to use normalization formula in each column as = (value- minimum value of that column)/(maximum value of that column-minimum value of that column).

Hence each column is to be normalized with respect to the minimum and maximum value of that column.

A= [ 1 2 3 4

3 4 5 6

4 5 6 7 ]

In above example column 1 has max value 4 and min value 1. so normalize value of first cell(1,1)=1-1/(4-1). Similarly column 2 has 2 as min and 5 as max value. Also all the final values of the modified matrix should be non negative (-ve value to be made +ve).

Pls provide the code.

Answer 1

[Matt J]

In recent Matlab,

A= [ 1 2 3 4 
        3 4 5 6 
       4 5 6 7 ];

A=normalize(A,1,'range')

A = 3×4

0 0 0 0 0.6667 0.6667 0.6667 0.6667 1.0000 1.0000 1.0000 1.0000

Answer 2

[Matt J]

a=min(A,[],1); b=max(A,[],1);

A=(A-a)./(b-a);