Displaying 1 result from an estimated 1 matches for "3d3d0a".
2006 Dec 26
4
vectorizing an iterative process.
Hi Everyone,
I am stuck with a simple problem. Suppose I have a vector x, and I want
to calculate y[i]=3Dx[i+1]-x[i], it is very easy. I just need to write
y<-x[2:length(x)]-x[1:length(x)-1].
Now if I know y, and want to know the vector x defined by
x[i]=3Dx[i-1]+y[i-1] for all i, how can I do this without a loop?
Thanks,
Geoffrey
PS. Sorry if you see a duplicate message. The previous