I have a 1x3 cell containing image data as a 5504 x 8256 double, each value in the matrix is a pixel grayscale intensity value. Each cell is a picture at a different time or frame. What I want to do is take the average pixel value across each frame. So say I have N number of frames or pictures, I want to average pixel at (row 1, column 1) across those N frames and so on for (row 1, column 2),(row 1, column 3).....and end up with a 5504 x 8256 matrix that has the average pixel value across the number of frames in my cell. Any ideas on how to do this? I was messing around with 3 4x3 double matrices in a 1x3 cell for ease but I was not able to find an efficient way in a for loop to do this for each pixel location.