Dear all, I am a newbie in R and need some help please. (I do apologise if my email is not as informative as it should be, I've tried to include the relevant details without overcrowding it with the rest of the code)
I would like to sample (without replacement) Y objects based on the number of objects in X in 5 different bins. I'm having trouble because the list object in which the number of objects of X is stored in doesn't start its index from 0. # number of X objects in each of the 5 bins x.bin.size <- lapply(x.by.bins, nrow) x.bin.size $`3` [1] 1 $`4` [1] 3 $`5` [1] 10 # no. of objects in each of the 5 bins of Y y.bin.size <- lapply(y.by.bins, nrow) > y.bin.size $`2` [1] 4 $`3` [1] 42 $`4` [1] 253 $`5` [1] 945 how do I loop through Y and sample from X when the index of Y starts from 2 and that of X starts from 3? in X, the missing index $`2` is assumed to have 0 objects in it. hence, I would only sample from Y and X starting from index 3. sample (y.bin.size$`3`, x.bin.size$`3`, replace=FALSE) but how should I do this in an R command without knowing which indexes (of X ) are empty? Any pointers would be greatly appreciated. Many thanks in advance, tania ______________________________________________ [email protected] 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.
