Hi all! Below is the problem I am struggling with. Let’s say I have a matrix (x) of values:
# [,1] [,2] [,3] [,4] #[1,] 1 3 2 1 #[2,] 2 1 3 2 I need to copy the items into a new matrix (y) with certain probability guidelines. I need to set it up such that: 1. for each item there is a probability (a) that the item will or will not be copied at all from x to y. If nothing is copied then the corresponding value in y should be 0. 2. If something is copied from x to y, then there should be a separate probability (b) that the items will be correctly copied to y with items that are incorrectly copied being randomly drawn from a geometric distribution. So y may look like the below example. Row 1 shows that [1,2] was copied and subsequently correctly copied but nothing else in [1,] was copied. In [2,], [2,1] was copied but subsequently incorrectly copied, [2,2] & [2,3] were not copied at all, and [2,4] was copied and correctly copied. # [,1] [,2] [,3] [,4] #[1,] 0 3 0 0 #[2,] 5 0 0 2 I would also like to setup a loop for this process wherein if something doesn’t get copied at all during a previous pass, then there is the opportunity for it to be copied on a second/third/etc pass. I hope this is clear enough. I am still a novice at R, so any help/guidance that can be offered will be greatly appreciated. Best, Billy Aue ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.