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Text File  |  1987-07-08  |  366 b   |  6 lines
  1. summary ( number block, period, how* )
  2. periodic sum
  3.  
  4. Arguments are: number block╤any number block; period╤size of groups within number block to be summed; how╤optional #ROW or #COL direction of sum.
  5.  
  6. Result is a block of size(number block)/period. If period is not evenly divisible into size(number block), the last rows or columns will be treated as a short group.