MATLAB: Calculate the area under histogram

Question

Hi Guys

I am using the below code to get a histogram plot over differenet data.

I want to know, how can I calculate the area below the histogram, and if i want that all area shall be equal to 1, then how can I do it?

Thanks in advance.

n = 50;
figure(3)
XEU100 = histogram(Delta_EU100,n);
hold on
XEU90 = histogram(Delta_EU90,n);
title('Mismatch distribution');
xlabel('Normalized mismatch power')
ylabel('P(\Delta)')

Answer 1

You can find the area under the histogram by summing all heights and multiply by the bin width

x = rand(1000,1);
h = histogram(x);
area = sum(h.Values)*h.BinWidth;

To get a histogram with the total area equal to 1. You can specify normalization

x = rand(1000,1);
h = histogram(x, 'Normalization', 'pdf');