Average each element of cell array

I have a 10x1 cell of separate events with each array having a size 384(time) x 5328(pixel). I want to average each pixel across each separate event. For example A{1,1}(1,1); averaged with A{2,1}(1,1) etc etc Thanks

[Stephen23]

Continued here:

http://www.mathworks.com/matlabcentral/answers/251016-multiply-each-column-of-cell-array-by-column-vector

Answer 1

[Stephen23]

The easiest way is to use cat to concatenate the cell array of numeric arrays into a simple 3D numeric array, and then use the inbuilt mean function with its optional second argument to take the average along the third dimension:

X = your cell array
Y = cat(3,X{:});
out = mean(Y,3);

Here is a simple example showing how this works:

>> X = {[1,2,3;4,5,6],[0,2,4;6,8,10]};
>> Y = cat(3,X{:})
Y(:,:,1) =
     1     2     3
     4     5     6
Y(:,:,2) =
     0     2     4
     6     8    10
>> out = mean(Y,3)
out =
          0.5            2          3.5
            5          6.5            8

[Carmel Howe]

thank you

[Chalita]

Hi. I'm new to matlab. This answer is very helpful for what I'm trying to do. Thanks.

I have about 1,000 cells in my cell array. What do I need to do if instead of taking average across all cells, I want to take average every 4 cells. That is, instead of 1 output cell, I should have 1,000/4 cells. Thanks

[Paolo]

@Chalita you should open a new question for your query.