How to sum the values from multiple arrays with the same dimensions?

I have four arrays (2400 x 2800) - I need to sum the values of each cell in the first array with the same cell from the other three arrays. How would I go about doing this?

Answer 1

[Guillaume]

Use + ?

 result = array1 + array2 + array3 + array4;   %of course using the actual names of the arrays

However, it sounds like you shouldn't have 4 separate arrays in the first place, but a 3D array instead:

array3d = cat(3, array1, array2, array3, array4);

in which case,

result = sum(array3d, 3);  %sum elements across 3rd dimension

[Charlotte Findlay]

The problem is that I have tried both of these methods and I can't seem to get any outputs from either when I use pcolor to plot the data and my results appear to all be NaN. I've checked all the arrays separately and they have information, so I'm not sure why when I sum them I get NaN.

[Guillaume]

Well, for us to find what the problem is attach your data as a mat file and show us the code you used.

[Charlotte Findlay]

I've actually resolved the problem myself - seems I needed to convert all NaN values to zeroes before I could use your code above. Will accept your above answer! Thanks for your help!