




cusum [-option] [vector(s)]; cumulative sum

Output is a vector with the ith element being the sum of the
first i elemtents from the input vector.  If no vector is
given, the standard input is assumed.

Option:   cn  n is the number of output elements per line.

Example:   cusum -c3 A
outputs the cumulative sum of the elements of A, three per
line.
