MATLAB: How to normalize value in matrix to 0 and 1

gene expressionmatrix array

I have this gene expression data

does it correct to use this ?

normA = data – min(data(:)) normA = normA ./ max(normA(:))

That will work.

If you have the Image Processing Toolbox, you can use mat2gray()

normA = mat2gray(data);

This can be simply done in a two step process

normA = A - min(A(:))
normA = normA ./ max(normA(:)) % *

note that A(:) makes A into a long list of values. Otherwise min(A) would not return a single value ... Try fro yourself!

A = imread('cameraman.tif');

Anorm = (A - min2(A))/(max2(A) - min2(A));