Hi, I am also new to R and I have a related question. I am trying to set negative values in a single column of a dataframe to zero and I can't seem to do it.
I have tried: KN1<-subset(KN,select=c(5)) # Here I am selecting the column of the dataframe KN1 and assigning it the name KN2 - this step works KN2<-ifelse(KN1<=0,0,KN1) # Here I am trying to set negative numbers to zero and leave all other numbers the same - this doesn't work Any help would be appreciated. Thanks, Debbie tonybreyal wrote: > > see ?ifelse > > you didn't specify what happens if a value is exactly zero in the dataset > and so i've just bundled it in with the negative case: > > x <- rnorm(20, 0, 1) > y<-ifelse(x<=0, 10, 5) > > HTH, > Tony Breyal > > > cmga20 wrote: >> >> Hi i am very new to R and I have been trying to change each individual >> piece of data in a data set to 10 if it is below 0 and 5 if it is above >> 0. I know this sounds very easy but i am struggling!! >> > > -- View this message in context: http://www.nabble.com/For-loop-for-distinguishing-negative-numbers-tp24499872p24870518.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
