Calculate the area under histogram

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Ali nouri
Ali nouri 2020-5-7
回答： Ameer Hamza 2020-5-7
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)')

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Ameer Hamza
Ameer Hamza 2020-5-7
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');

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