[R] Mean(s) from values in different row?
Hello: Is there a way to get a mean from values stored in different rows? The data looks like this: YEAR-1, JAN, FEB, ..., DEC YEAR-2, JAN, FEB, ..., DEC YEAR-3, JAN, FEB, ..., DEC What I want is the mean(s) for just the consecutive winter months: YEAR-1.DEC, YEAR-2.JAN, YEAR-2.FEB YEAR-2.DEC, YEAR-3.JAN, YEAR-3.FEB etc. Thanks. __ 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.
[R] Rekeying value denoting NA
I'm trying to rekey values which denote there is no values, i.e., '-999' in a dataset which contains both '-999' and NA entries. When I try the following command I get the following error: > data.frame[data.frame$MAR <= -9,"MAR"] <- NA "missing values are not allowed in subscripted assignments of data frames" Example of data: YEAR JAN FEB MAR ... DEC 1931 5 -999NA 3 1932 2 1 -9992 . . . 2010 -999NA 2 1 I've tried to replace the NAs with -999 values first to remove the NA values, but got the same error. I'm quite new to R, and these little issues seem to be a stumbling block. Many thanks for any help you might be able to offer. __ 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.
