Dear R Helpers, I did a search for deleting rows based on conditions but wasn't able to find an example that addressed the error that I am getting. I am hoping that this is a simple syntax phenomenon that somebody else knows off the top of their head. My apologies for not providing a reproducible example but I think that the information given will allow someone to give me a hint.
I want to delete the rows of the data frame ZZ where Index is earlier that Jan 1 of 2007. That Index column is a factor. When I tired a couple of different methods, I got the error shown below. Can anybody tell me what I am doing wrong? I would really appreciate it. --John Sparks > str(ZZ) 'data.frame': 1584 obs. of 7 variables: $ Index : Factor w/ 1583 levels "2006-04-07","2006-04-10",..: 1 2 3 4 5 6 7 8 9 10 ... $ Open : num 17.5 17.6 16.8 17.2 17 ... $ High : num 18.2 17.6 17.2 17.2 17.1 ... $ Low : num 17.3 16.8 16.8 16.8 16.6 ... $ Close : num 17.5 16.8 17.1 16.8 16.7 ... $ Volume : num 23834500 2916000 1453700 991400 967400 ... $ Adjusted: num 16.8 16.2 16.4 16.2 16 ... > test<-ZZ[ZZ$Index>"2007-01-01",] Warning message: In Ops.factor(ZZ$Index, "2007-01-01") : > not meaningful for factors > > test<-subset(ZZ,Index>2007-01-01) Warning message: In Ops.factor(Index, 2007 - 1 - 1) : > not meaningful for factors ______________________________________________ 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.
