Hi, Try this,
set.seed(1) dat2<-data.frame(col1=c(sample(c("high","Neutral","low"),10,replace=TRUE)),col2=rep(NA,10)) dat2$col2[dat2$col1=="high"]<-"H" dat2$col2[dat2$col1=="Neutral"]<-"N" dat2$col2[dat2$col1=="low"]<-"L" dat2 # col1 col2 #1 high H #2 Neutral N #3 Neutral N #4 low L #5 high H #6 low L #7 low L #8 Neutral N #9 Neutral N #10 high H Not sure if this is okay for you, A.K.rr A.K. ________________________________ From: Sachinthaka Abeywardana <sachin.abeyward...@gmail.com> To: arun <smartpink...@yahoo.com> Cc: R help <r-help@r-project.org> Sent: Sunday, August 12, 2012 9:07 PM Subject: Re: [R] if else elseif for data frames The thing is I have about 10 cases. I saw the ifelse statement but was wondering if there was a cleaner method of doing it. The coding will get really messy when I write all 10 cases. Cheers, Sachin On Mon, Aug 13, 2012 at 11:04 AM, arun <smartpink...@yahoo.com> wrote: Hi, >Try this: >dat1<-data.frame(col1=c(rep("high",3),rep("Neutral",3),rep("low",4))) > dat1$col2<-ifelse(dat1$col1=="high",dat1$col2<-"H",ifelse(dat1$col1=="Neutral",dat1$col2<-"N","L")) >dat1 > col1 col2 >1 high H >2 high H >3 high H >4 Neutral N >5 Neutral N >6 Neutral N >7 low L >8 low L >9 low L >10 low L > >A.K. > > > > > >----- Original Message ----- >From: Sachinthaka Abeywardana <sachin.abeyward...@gmail.com> >To: r-help@r-project.org >Cc: >Sent: Sunday, August 12, 2012 8:43 PM >Subject: [R] if else elseif for data frames > >Hi all, > >It seems like I cannot use normal 'if' for data frames. What would be the >best way to do the following. > >if data$col1='high' > data$col2='H' >else if data$col1='Neutral' > data$col2='N' >else if data$col='low' > data$col2='L' >else > #chuch a warning? > > >Note that col2 was not an existing column and was newly assigned for this >task. > >Thanks, >Sachin > > [[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.