I have two data frames: > str(ysmd) 'data.frame': 8325 obs. of 6 variables: $ X.stock : Factor w/ 8325 levels "A","AA","AA-",..: 2702 6547 4118 7664 7587 6350 3341 5640 5107 7589 ... $ market.cap : num -1.00 2.97e+10 3.54e+08 3.46e+08 -1.00 ... $ X52.week.low : num 40.2 22.5 27.5 12.2 20.7 ... $ X52.week.high : num 43.3 38.2 35.1 19.2 32.7 ... $ X3.month.average.daily.volume: num 154 7862250 16330 205784 14697 ... $ X50.day.moving.average.price : num 41.8 36.3 30.5 15.2 29.9 ... > str(top1000) 'data.frame': 1000 obs. of 1 variable: $ V1: Factor w/ 1000 levels "AA","AAI","AAP",..: 146 96 341 814 382 977 66 1 737 595 ...
I want to split ysmd into two new data frames: ysmd.top1000 and ysmd.rest so that ysmd.top1000$X.stock only contains factors from top1000$V1 and ysmd.rest$X.stock contains all the other factors. I should be able to just write ysmd.top1000 <- ysmd[ysmd$X.stock "is in" top1000$V1,] ysmd.rest <- ysmd[ysmd$X.stock "not in" top1000$V1,] but how so I check whether a string is a member of a factor? -- Sam Steingold (http://sds.podval.org/) on CentOS release 5.6 (Final) X 11.0.60900031 http://mideasttruth.com http://truepeace.org http://camera.org http://thereligionofpeace.com http://pmw.org.il Professionalism is being dispassionate about your work. ______________________________________________ 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.
