Other MATLAB functions operate essentially on a vector (row or column),
but act on an m × n matrix in a column-by-column fashion to
produce a row vector containing the results of their application to each
column. Row-by-row action can be obtained by using transpose. For
example, mean(A')'. A few of these functions are:
max sum median any min prod mean all sort std
For example, the maximum entry in a matrix A is given by max(max(A)) rather than max(A). Try it!