In order to find the mean column-wise, I know that we should code as follows:
Answer = nanmean(mymatrix,2);
Now I have a matrix of size 770 rows x 5760 columns. But I would like to find the mean after EVERY 4 columns and store them in a new matrix. So my final answer matrix will have 770 rows x 1440 columns. How can I do that? Any help is appreciated!