I'm an R newbie trying to do an operation that seems like it should be very simple, but after much playing around with the interface and reading "An Introduction to R" I can figure out how to do it.
I have two text files. File1 contains: type n dog 2 cat 4 horse 6 File2 contains: type n horse 1 dog 3 cat 9 mouse 11 I want to read both files into R and multiply corresponding values of n so that I end up with: dog 2*3 = 6 cat 4*9 = 36 horse 6*1 = 6 mouse 0*11 = 0 Note that the type rows are not necessarily in the same order in the two files, and that a missing type gets a default n = 0 value. I figure the way to do this is use read.table and do the appropriate manipulation of the factors, but I can't figure out what those manipulations would be. Basically I want to use a factor table as a hash table, but I haven't been able to figure out how to do this, which makes me think I'm not conceptualizing this is the correct R-ish way. Thanks. -- Bill McNeill http://staff.washington.edu/billmcn/index.shtml [[alternative HTML version deleted]] ______________________________________________ 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.
