... and if Michael is correct, there is a lesson here: Think of how much time and aggravation you would have saved yourself if you had FIRST made an effort to read the docs. The FAQ's are there for a reason. As is An Introduction to R, which also should be read before posting on this list.
If Michael is wrong, then the above homily should be amended to: If you have not already done so, read the FAQ's and An Introduction to R. You will save yourself -- and us -- much time and effort by doing so. Thus endeth the lesson. -- Bert On Fri, Aug 24, 2012 at 1:36 PM, R. Michael Weylandt <michael.weyla...@gmail.com> wrote: > On Fri, Aug 24, 2012 at 3:22 PM, Jennifer Sabatier > <plessthanpointohf...@gmail.com> wrote: >> Hi R-Helpers, >> >> I don't think I need to post a dataset for this question but if I do, I >> can. Anyway, I am having a lot of trouble with the ifelse command. >> > You probably should have: dput() makes it super easy as well. > >> Here is my code: >> >> >> vn$PM.DIST_flag <- ifelse( (vn$PM.EXP > 0.0) & (vn$PM.DIST.TOT != 1.0), 1, >> 0 ) >> >> >> And here is my output that doesn't make ANY sense: >> >> PM.EXP PM.DIST.TOT PM.DIST_flag 0 0 0 0 0 0 0 0 0 177502 1 0 31403 1 >> 0 0 0 0 1100549 1 0 38762 1 0 0 0 0 20025 1 0 0 0 0 13742 1 0 0 0 0 >> 83078 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 >> 165114 1 0 0 0 0 417313 1 0 3546 1 0 4613 1 0 225460 1 0 6417 1 1 23 >> 1 0 3402 1 0 8504 1 1 8552 1 0 9723 1 0 37273 1 1 396 1 0 1478 1 0 >> 2074 1 0 12220 1 1 97691 2 1 0 0 0 33993 2 1 > > Indeed it makes no sense to me either because you sent HTML email > which got mangled by the server. > >> >> As you can see, there are many instances where PM.EXP > 0 and PM.DIST.TOT = >> 1 yet PM.DIST_flag = 1 and it should be 0. It should only flag in cases >> such as the last line of data. >> >> WWHHHYYYYYYYY???? Why why why why why why why? Why? >> >> (Sorry, I've been trying to figure this out for hours and I've devolved to >> mumbling in corners and banging my head against the table) >> >> What in the world am I doing wrong? Or is ifelse not the right function? > > First guess.... standard problems with equality of floating point > numbers. (See R FAQ 7.31 for the details) > > You probably want to change > > x == 1 > > to > > abs(x - 1) < 1e-05 > > or something similar. > > Cheers, > Michael > >> >> Best, >> >> Jen >> >> [[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. > > ______________________________________________ > 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. -- Bert Gunter Genentech Nonclinical Biostatistics Internal Contact Info: Phone: 467-7374 Website: http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm ______________________________________________ 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.
