you probably want to use %in%: > idfortest <- c(6,23,46,63,200,238,297,321,336,364,386,392,414,434,441) > id <- seq(1:500) > id[id %in% idfortest] [1] 6 23 46 63 200 238 297 321 336 364 386 392 414 434 441
take a look at what 'id == idfortest' gives; study up on the recycling of arguments. On Thu, Aug 18, 2011 at 5:52 AM, Rut S <wis...@hotmail.com> wrote: > > Dear sir/madam, > > I tried to recode some complex multiple variables and run into a problem that > r can change only some column that I want to change. > > I can reproduce the problem with this > > idfortest <- c(6,23,46,63,200,238,297,321,336,364,386,392,414,434,441) > id <- seq(1:500) > id[id==idfortest] > > the result showed > Warning in id == idfortest : > longer object length is not a multiple of shorter object length > [1] 200 386 434 > > can you enlighten me for this, thank you in advance. > > Regards, > Wisarut > > [[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. > -- Jim Holtman Data Munger Guru What is the problem that you are trying to solve? ______________________________________________ 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.
