Convert for loop to matrix operation

I have loaded an image, created a histogram for it and would like to convert this for loop to matrix operation, how would I do that?

h1 = histogram(img1, edges, 'normalization','probability');
cdf = zeros(1, h1.NumBins);
sum_value = 0;

for i = 1:h1.NumBins
    sum_value = sum_value + h1.Values(i);
    cdf(i) = (h1.NumBins-1)*sum_value;
end

[Antoni Garcia-Herreros]

Hello,

You can try using cumsum

sum_value=sum(h1.Values); %This will be always 1 if you use the normalitzation probability in your histogram
cdf=cumsum(h1.Values).*(h1.NumBins-1); 

Answer 1

[daniel mitchell]

perhaps this is the solution you are looking for?

h1 = histogram(randn(1e7,1), 'normalization','cdf','DisplayStyle','stairs');

cdf = h1.Values;