how to plot a histogram of repeated values in a matrix?

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Niki 2015-9-16

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https://ww2.mathworks.cn/matlabcentral/answers/243362-how-to-plot-a-histogram-of-repeated-values-in-a-matrix

评论： Thorsten 2015-9-16

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I have a matrix like below.

X = [120 2 3 250 60; 4 5 6 120 250; 7 8 3 250 10]

I want to plot a histogram shows the number of times a value is repated in each columns for example in first 120 in repeated 2 times in this matrix 250 is repeated 3 times in this matrix. any solution ?

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Thorsten 2015-9-16

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编辑：Thorsten 2015-9-16

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This computes how often each value occurs

 [a b c] = unique(X);
 [X(b) histc(c, 1:max(c))]

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Niki 2015-9-16

编辑：Niki 2015-9-16

but my main question is to plot it not to print it.

Thorsten 2015-9-16

在 MATLAB Online 中打开

I see. Try this:

 B = [X(b) histc(c, 1:max(c))];
 stem(B(:,2), 'Linewidth', 2, 'Marker', 'none')
 set(gca, 'XTickLabel', B(:,1))
 axis([0 size(B,1)+1 0 1.1*max(B(:,2))])
 box off