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 example, gives you to have a hint at what attributes you can poke at and how. Cheers, Kevin On Thu, Jul 10, 2014 at 5:09 PM, Chaomei Lo <[email protected]> wrote: > 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 > > > > > _______________________________________________ > Rcpp-devel mailing list > [email protected] > https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel >
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