Why do you want to create a variable within the function since it will
disappear after the return. Is there a reason for that? Here is one
way of getting the names by just using them on the cbind.
Also you are create a 'matrix' and 'names' is not appropriate for that
type of object.
> # Test Function
> myfunc <-function(var){
+ d = c(1,2,3,4,5)
+ dts = seq(as.Date("2011-01-01"),by="month",length.out=length(d))
+
+ assign(paste(var,".df",sep=""), cbind(Dates = dts, Data = d))
+ get(paste(var,".df",sep="")) # return object
+ }
>
> # Call Function
> myfunc("X")
Dates Data
[1,] 14975 1
[2,] 15006 2
[3,] 15034 3
[4,] 15065 4
[5,] 15095 5
To get the same return value, you could:
> # Test Function
> myfunc <-function(var){
+ d = c(1,2,3,4,5)
+ dts = seq(as.Date("2011-01-01"),by="month",length.out=length(d))
+
+ cbind(Dates = dts, Data = d)
+ }
>
> # Call Function
> myfunc("X")
Dates Data
[1,] 14975 1
[2,] 15006 2
[3,] 15034 3
[4,] 15065 4
[5,] 15095 5
>
On Thu, Dec 22, 2011 at 2:15 PM, Pete Brecknock <peter.breckn...@bp.com> wrote:
> I am trying to rename column names in a dataframe within a function. I am
> seeing an error (listed below) that I don't understand.
>
> Would be grateful of an explanation of what I am doing wrong and how I
> should rewrite the function to allow me to be able to rename my variables.
>
> Thanks.
>
> # Test Function
> myfunc <-function(var){
> d = c(1,2,3,4,5)
> dts = seq(as.Date("2011-01-01"),by="month",length.out=length(d))
>
> assign(paste(var,".df",sep=""), cbind(dts, d))
>
> names(get(paste(var,".df",sep=""))) <- c("Dates","Data")
> }
>
> # Call Function
> myfunc("X")
>
> # Error Message
> Error in names(get(paste(var, ".df", sep = ""))) <- c("Dates", "Data") :
> could not find function "get<-"
>
> --
> View this message in context:
> http://r.789695.n4.nabble.com/Renaming-Within-A-Function-tp4226368p4226368.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.
--
Jim Holtman
Data Munger Guru
What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.
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