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

5 messages · Dr. Holger van Lishaut, Rui Barradas, David L Carlson

Dr. Holger van Lishaut
# 
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):
+     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"
Error: Unexpected 'in' in "        For (j in"
Error in RegGraf(data, ContrVar[i], RespVar[j]) :
     Object 'ContrVar' not found
Error: Unexpected '}' in "        }"
Error: Unexpected '}' in "    }"
Can someone please show me what is wrong?

Thanks in advance
Holger
Rui Barradas
# 
Hello,

Generally those error messages refer to something that preceeds them. 
This is the current case: the parser is expecting a function's argument. 
The function name is 'For' with uppercase 'F'. The first argument is 
'i', then there should be a comma before a second argument.

The solution is obviously to write 'for', with lowercase 'f'.

Hope this helps,

Rui Barradas
Em 10-08-2012 22:15, Dr. Holger van Lishaut escreveu:
Dr. Holger van Lishaut
# 
Am 11.08.2012, 01:18 Uhr, schrieb Rui Barradas <ruipbarradas at sapo.pt>:
Dear Mr Barradas,

indeed it did help,
thank you very much!

Best regards
Holger van Lishaut
Dr. Holger van Lishaut
# 
Am 11.08.2012, 01:18 Uhr, schrieb Rui Barradas <ruipbarradas at sapo.pt>:
Dear Mr Barradas,

indeed it did help, thank you very much!

Best regards
Holger van Lishaut
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