help mata mm_colrunsum()
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Title

    mm_colrunsum() -- Running sum of each column


Syntax

        numeric matrix mm_colrunsum(real matrix Z)


Description

    mm_colrunsum() returns a matrix containing the running sum over each
    column of Z.  Missing values are treated as zero.


Remarks

    mm_colrunsum() was written for Stata 9 and predates the release of
    official Stata's runningsum() function in Stata 10. Changes have been
    made to mm_colrunsum() so that it redirects itself to runningsum() if
    used in Stata 10.


Conformability

    mm_colrunsum(Z):
             Z:  r x c
        result:  r x c


Diagnostics

    mm_colrunsum() treats missing values as contributing zero to the running
    sum; they do not cause the running sum to become missing.


Source code

    mm_colrunsum.mata


Author

    Ben Jann, ETH Zurich, jann@soz.gess.ethz.ch


Also see