Sweave can't see a vector if run from a function ?
- by PaulHurleyuk
I have a function that sets a vector to a string, copies a Sweave document with a new name and then runs that Sweave. Inside the Sweave document I want to use the vector I set in the function, but it doesn't seem to see it.
(Edit: I changed this function to use tempdir(() as suggested by Dirk)
I created a sweave file test_sweave.rnw;
%
\documentclass[a4paper]{article}
\usepackage[OT1]{fontenc}
\usepackage{Sweave}
\begin{document}
\title{Test Sweave Document}
\author{gb02413}
\maketitle
<<>>=
ls()
Sys.time()
print(paste("The chosen study was ",chstud,sep=""))
@
\end{document}
and I have this function;
onOK <- function(){
chstud<-"test"
message(paste("Chosen Study is ",chstud,sep=""))
newfile<-paste(chstud,"_report",sep="")
mypath<-paste(tempdir(),"\\",sep="")
setwd(mypath)
message(paste("Copying test_sweave.Rnw to ",paste(mypath,newfile,".Rnw",sep=""),sep=""))
file.copy("c:\\local\\test_sweave.Rnw",
paste(mypath,newfile,".Rnw",sep=""), overwrite=TRUE)
Sweave(paste(mypath,newfile,".Rnw",sep=""))
require(tools)
texi2dvi(file = paste(mypath,newfile,".tex",sep=""), pdf = TRUE)
}
If I run the code from the function directly, the resulting file has this output for ls();
> ls()
[1] "chstud" "mypath" "newfile" "onOK"
However If I call onOK() I get this output;
> ls()
[1] "onOK"
and the print(...chstud...)) function generates an error.
I suspect this is an environment problem, but I assumed because the call to Sweave occurs within the onOK function, it would be in the same enviroment, and would see all the objects created within the function. How can I get the Sweave process to see the chstud vector ?
Thanks
Paul.
