Thanks a lot for help. Kevin.
You are correct, both df.attr("names") and df.names() work.
Chaomei
On Thu, Jul 10, 2014 at 5:14 PM, Kevin Ushey wrote:
> df.attr("names") ? data.frames do not have a column names attribute.
> Neither do matrices, for that matter, which have an (optional) `dimn
df.attr("names") ? data.frames do not have a column names attribute.
Neither do matrices, for that matter, which have an (optional) `dimnames`
attribute.
Please see: http://gallery.rcpp.org/articles/setting-object-attributes/,
and also try looking at what e.g. `attributes(data.frame(x=1))`, for
ex
I have a R data frame pass to the Rcpp function, for example in below-
void myDataFrame(Rcpp::DataFrame df) {
}
I would need to know the column names first before I retrieve the data but
df.colnames() does not work but the df.length() and df.nrows() work.
Thanks for help !
Chaomei
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