cumprod:

Syntax:	cumprod ( A )

Description:

	cumprod computes the running, or cumulative product of the
	input, A. If the input is a rectangular matrix, then the
	cumulative product is performed over the columns of the
	matrix. 

Example:

		> a=1:4
		 a =
		        1          2          3          4  
		> cumprod (a)
		        1          2          6         24  
		> a = [1,2,3;4,5,6;7,8,9]
		 a =
		        1          2          3  
		        4          5          6  
		        7          8          9  
		> cumprod (a)
		        1          2          3  
		        4         10         18  
		       28         80        162  

See Also: cumsum, prod, sum
