R help - Oct 2011 - Problem in creating XML

I've a problem in creating an XML

My code
node= newXMLNode("data")
new<-newXMLNode("new",parent=node)
child<-newXMLNode("Plot",parent=new)

My dataframe Plot looks like below

                  x     y
                  0 123812.31
                  1 120166.77
                   2 111115.83
                   3 102809.13
                   4  84438.97
                   5  84588.40

for( i in nrows(Plot))
{
  
  newXMLNode(child,attrs = c(x = as.character(i),y
as.character(Plot$y[j])),parent=newl)
 
}

Butg i'm getting error  "Error in strsplit(name, ":") :
non-character
argument"

Please help me

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