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Other MATLAB functions operate essentially on a vector (row or column), but act
on an m-by-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 the 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.