How to get max and min intensity difference in every column of an image?

how to create histogram for every column so that i can get 2 values for where the max and min intensity occurred. thanks

Answer 1

[Azzi Abdelmalek]

max(im)-min(im)

[Rockstardmtb]

will it be for each column of image?

[Azzi Abdelmalek]

look at this example

im=[1 20 5;4 10 0;2 6 3]
max(im)
min(im)