MATLAB: How to plot histogramme

MATLABplotvector

How can I plot histograme of a vector with four values independant?

v=[1; 2;0;1]

If those values describe the bar height, you could use bar(___,width) and specify the width of the bars as 1 to resemble a histogram.

v=[1; 2;0;1]; 
bar(v,1)  % figure shown below

Alternatively, you can use histogram('BinEdges',edges,'BinCounts',counts) which specifies the bin edges.

histogram('BinEdges',.5 : 1 : 4.5,'BinCounts',v)

You could request output from histogram():

h = histogram(S,'Normalization','probability');

and access properties such as h.BinEdges, h.BinCounts, h.Values, etc, described here.

Or you could use histcounts(), described here, after you plot your histogram:

histogram(S,'Normalization','probability');
[binCounts,binEdges] = histcounts(S,'Normalization','probability');

histogram(YourImage(:), 16)