MATLAB: How to normalize a plot

Question

Hi, can anybody help me to understand how to normalize a spectrum ? I have a spectra and I want to obtain its area equal to 1. Thanks in advance.

Answer 1

If you want the area to be 1.0, create the sum over the spectrum and divide the values by the result.

spectrum   = rand(1, 100);  % Example data
normalized = spectrum / sum(spectrum);