On Aug 11, 2010, at 10:29 PM, harsh yadav wrote:
Hi,
I am writing a function that writes to a csv file for every call.
However, for the subsequent calls, I want to append the data to the
existing
csv file without appending the column names again.
I tried searching in the previous posts, but I am stuck with different
errors.
Here is what I am doing (dataF is a data-frame):-
outputFilePath <- paste(getwd(), "/", "outputModel.csv", sep="");
counter <- 1
for (userid in userids){
dataF <- getUserData(userid)
if(counter == 1){
write.csv(dataF, file = outputFilePath, append=F)
}else{
write.csv(dataF, file = outputFilePath, append=T,col.names=NA)
}
counter <- counter + 1
}
I tried setting col.names = F (In append=T), but no good.
Can anyone throw light on the correct usage.
Change second write.csv to write.table, add a sep argument.
write.csv() ignores an append argument. The second line of its code is:
for (argname in c("append", "col.names", "sep", "dec", "qmethod")) if
(!is.null(Call[[argname]]))
warning(gettextf("attempt to set '%s' ignored", argname),
domain = NA)
Didn't you believe the warnings?
--
David.
Thanks in advance.
Regards,
Harsh Yadav
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