[R] Convert data frame to XML-Tree

[T.Wunder at stud.uni-heidelberg.de]

Hello,

I'd like to convert R data frames into xml-trees. I wrote (and copied)  
this little program to do this:


convertToXML <- function(df,name)
{
xml <- xmlTree("Test")
xml$addNode(name, close=FALSE)
for (i in 1:nrow(df)) {
     xml$addNode("value", close=FALSE)
     for (j in names(df)) {
         xml$addNode(j, df[i, j])
     }
     xml$closeTag()
}
xml$closeTag()
return(xml)
}

Well, now I get a warning message like
"In xmlRoot.XMLInternalDocument(currentNodes[[1]]) : empty XML document"

if I use this function. How could this be fixed?

Thank you for your help!
Tom