CUMSUM  CUMSUM Cumulative Summation Function


Usage
 
 Computes the cumulative sum of an n-dimensional array along a given
 dimension.  The general syntax for its use is
 
   y = cumsum(x,d)
 
 where x is a multidimensional array of numerical type, and d
 is the dimension along which to perform the cumulative sum.  The
 output y is the same size of x.  Integer types are promoted
 to int32. If the dimension d is not specified, then the
 cumulative sum is applied along the first non-singular dimension.
 