Average of two dimensional array

Question

I have one dimensional array and i need to calculate it's average.

I tried:

A = mean(mean(PSNRarr,2),2)

but I get an error.

If someone knows how to make it work it will be great!

Answer 1

The easiest way that works for any amount of dimensions (assuming it is a regular matrix):

 mean(PSNRarr(:))

However, if you have a cell array with numbers, try:

mean(mean(cell2mat(PSNRarr)))