Full range of values on x-axis - matlab

Question

I'm trying to check the full range of values on the x-axis of a histogram, especially while I expected the full range to be [0, 255] , when I used the following command for the histogram [h, bins] = hist(H) , I got the following:

h =

   221    20     6     4     1     1     2     0     0     1


bins =

  Columns 1 through 7

    8.2500   24.7500   41.2500   57.7500   74.2500   90.7500  107.2500

  Columns 8 through 10

  123.7500  140.2500  156.7500

This implies that the maximum range I got here is up to 165 .

If we look at the histogram below, we can see that 165 seems to be the maximum number of frequency value. How do I know the maximum value (range) of the x-axis?

Answer 1

I think you need either one of these 3 options:

max(H)

Or

numel(unique(H))

or

numel(H)

I would start at the top till you find the one you need.