> How do I draw an histogram knowing the number of times all elements in a 150x150 matrix appears using matlab?
Both histogram and histogram2 offer two types of syntaxes. One syntax lets you input the raw data so that the function can compute the density of each bin. The second lets you enter the bins and densities yourself.
It sounds like you want the second but it's unclear whether your density data are a vector (use histogram) or a matrix (use histogram2).
Here is an example of both.
histogram
counts = [12.5 38.9 4.2 9.8 28.22 11.1];
binEdges = [2 4 6 8 10 12 14];
figure()
histogram('BinEdges', binEdges, 'BinCounts', counts)
cats = categorical([2 4 6 8 10 12]);
figure()
histogram('Categories', cats, 'BinCounts', counts)
histogram2
counts = magic(5)
xBinEdges = [-2 -1 0 1 2 3];
yBinEdges = [10 20 30 40 50 60];
figure()
histogram2('XBinEdges',xBinEdges,'YBinEdges',yBinEdges,'BinCounts',counts)
