Display the quotient of two histograms

Hi, i have two histograms of X and Y and what i would like to do this if it is possible :

i would like to display an histogram which will be the quotient of the two histograms. Of course i have the same borders for the two sides.

Any idea ?

Thanks a lot !

Answer 1

[Walter Roberson]

If you are using the newer histogram function, then access the Values properties of the two, calculate the ratios, and use bar() to draw the result.

[Image Analyst]

You could also use histcounts(). Just be clear on if you want the ratio of the histograms, countsX/countsY, or if you want the histogram of the data histcounts(X./Y).

[abc abc]

Thanks it is exactly what i would like to do that's to say i want the ratio of the histograms, countsX/countsY but how do you do this ? Do you have an example ?

Many thanks :)

[abc abc]

But the problem is X and Y are matrix but have no the same dimensions so i can't write X./Y. However i think i can do countsX/countsY ?

[Walter Roberson]

   subplot(1,3,1);
   h1 = histogram(rand(1,100).^2, 15);
   h1_edges = h1.BinEdges;
   h1_cents = mean([h1_edges(1:end-1); h1_edges(2:end)]);
   subplot(1,3,2);
   h2 = histogram(randn(1,100).^2, 15);
   ratio = h1.Values ./ h2.Values;
   subplot(1,3,3);
   bar(h1_cents, ratio);

Make sure they have the same number of bins.

Also, the above is not a great example because the range of the second histogram is wider, so the bins do not align. Or perhaps it is a good example, as it shows the danger of just taking the ratio of the bins instead of making sure that the bins are for the same range.