





Hi all,

Is there a way to do a matrix multiplication in a faster way?
I am making a product of a matrix (composed of a lot of dummy variables) and a vector, and is there any way to make it faster?
The simple X %*% y takes too long a time.
I know using sparse matrix would help, but don't know how to do it i R.


Thank you.


 		 	   		  
_________________________________________________________________
[[elided Hotmail spam]]

	[[alternative HTML version deleted]]


