s = cumprod(a,dim) : computes the cumulative product of iData objects elements
@iData/cumprod function to compute the cumulative product of the elements of the data set
cumprod(a,dim) operates along axis of rank dim.
input: a: object or array (iData)
dim: dimension to accumulate (int)
output: s: accumulated product of elements (iData)
ex: c=cumprod(a);
Version: Aug. 22, 2017
See also iData, iData/plus, iData/sum, iData/prod, iData/cumprod