[R] Function definition: where is the error in the "for" loop?

[David L Carlson]

There is no command "For" in R. It is "for" and R is case sensitive.

----------------------------------------------
David L Carlson
Associate Professor of Anthropology
Texas A&M University
College Station, TX 77843-4352


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Dr. Holger van Lishaut
> Sent: Friday, August 10, 2012 4:16 PM
> To: r-help at r-project.org
> Subject: [R] Function definition: where is the error in the "for" loop?
> 
> Dear all,
> 
> The following function code fails with errors (see below):
> 
> RegPlots <- function (data, ContrVar, RespVar){
>        intNmbrRows<-length(RespVar);intNmbrCols<-lenght(ContrVar)
>        par(mfrow=c(intNmbrRows,intNmbrCols))
>        For(i in 1:intNmbrRows){
>            For (j in 1:intNmbrCols){
>                RegGraf(data,ContrVar[i],RespVar[j])
>            }
>        }
>        par(mfrow=c(1,1))
> 
> #(RegGraf is another function that creates a plot and that runs
> flawlessly)
> 
> Output (translated to english):
> 
> > RegPlots <- function (data, ContrVar, RespVar){
> +     intNmbrRows<-length(RespVar);intNmbrCols<-lenght(ContrVar)
> +     par(mfrow=c(intNmbrRows,intNmbrCols))
> +     For(i in 1:intNmbrRows){
> Error: Unexpected 'in' in:
> "    par(mfrow=c(intNmbrRows,intNmbrCols))
>        For(i in"
> >         For (j in 1:intNmbrCols){
> Error: Unexpected 'in' in "        For (j in"
> >             RegGraf(data,ContrVar[i],RespVar[j])
> Error in RegGraf(data, ContrVar[i], RespVar[j]) :
>      Object 'ContrVar' not found
> >         }
> Error: Unexpected '}' in "        }"
> >     }
> Error: Unexpected '}' in "    }"
> >     par(mfrow=c(1,1))
> 
> Can someone please show me what is wrong?
> 
> Thanks in advance
> Holger
> 
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