As R notes, the problem is that you are trying to fit 9 rows into two: specifically, note that on the left hand side you select only those rows such that X[,"c"]==1 (which is 2 for your data) while on the right hand you select all 9rows of column "d" so they simply don't fit. If you change the code to
X[X[,"c"]==1,"b"]<-X[X[,"c"]==1,"d"] it will move the column "d" rows corresponding to the ones you've selected on the LHS. Hopefully that makes sense. Michael Weylandt On Wed, Aug 3, 2011 at 8:09 AM, zcatav <zca...@gmail.com> wrote: > Your suggestion works perfect as i pointed previous message. Now have > another > question about data editing. I try this code: > X[X[,"c"]==1,"b"]<-X[,"d"] > and results with error: `[<-.data.frame`(`*tmp*`, X[, "c"] == 1, "b", value > = c(NA, : > replacement has 9 rows, data has 2 > > Logically i selected 2 rows with X[,"c"]==1. Than i want to replace in that > rows its own data from "d" to "b" with X[,"b"]<-X[,"d"]. What is wrong? > > -- > View this message in context: > http://r.789695.n4.nabble.com/conditional-data-replace-recode-change-or-whatsoever-tp3714715p3715218.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. > [[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.
