Is this what you are after? floor(data[,model.list])
Or I just didn't understand what you are trying to accomplish? cheers Francisco PS: try to avoid using names that are already reserved to a function like "data" See ?data >From: Chad Reyhan Bhatti <[EMAIL PROTECTED]> >To: [email protected] >Subject: [R] the difference between "x1" and x1 >Date: Thu, 20 Apr 2006 18:02:02 -0500 (CDT) > >Hello, > >I am not sure what to write in the subject line, but I would like to take >a character string that is a variable in a data frame and apply a function >that takes a numeric argument to this character string. > >Here is a simplified example that would solve my problem. >Imagine I have my data stored in a data frame. > > x1 <- x2 <- x3 <- x4 <- x5 <- rnorm(20,0,1); > > data <- as.data.frame(cbind(x1,x2,x3,x4,x5)); > >I have a vector containing the variables of interest as such. > > model.list <- c("x1","x3","x4"); > > > model.list[1] >[1] "x1" > >I would like to loop through this vector and apply the floor() function to >each variable. In the current form the elements of model.list do not >represent the variables in the data frame. > > > floor(model.list[1]) >Error in floor(model.list[1]) : Non-numeric argument to mathematical >function > > > floor(eval(model.list[1])) >Error in floor(eval(model.list[1])) : Non-numeric argument to mathematical >function > > > s <- expression(paste("floor(",model.list[1],")",sep="")) > > s >expression(paste("floor(", model.list[1], ")", sep = "")) > > eval(s) >[1] "floor(x1)" > > > >I have tried the obvious (to me) without success. Perhaps someone could >suggest a >solution and some tidbits for me to read up on about the how and why. > >Thanks, > >Chad R. Bhatti > >______________________________________________ >[email protected] mailing list >https://stat.ethz.ch/mailman/listinfo/r-help >PLEASE do read the posting guide! >http://www.R-project.org/posting-guide.html ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
