# [Rcpp-devel] Maximum Columns in Rcpp DataFrame (revisited)

Steffen Neumann sneumann at ipb-halle.de
Tue Jul 8 17:51:53 CEST 2014

Hi,

I (think I) need to create a DataFrame with more than 20 entries,
because I want another slot in this file:
https://github.com/sneumann/mzR/blob/master/src/RcppRamp.cpp#L221

I stumbled upon a 2year old answer here:

http://lists.r-forge.r-project.org/pipermail/rcpp-devel/2013-March/005430.html

Questions:

1) Should I avoid DataFrame here in first place ? I'd love to keep it
2) Is there a more elegant solution for >20 entries by now ?
3a) How do I create the mentioned "local header file with 21, 22, 23, ... \infty arguments as you need it."
3b) How and where do I #include that ? I need to fake a directory structure
so that <Rcpp/DataFrame.h> picks up my version of #include <Rcpp/generated/DataFrame_generated.h> ?
4) Is that future proof ?!

Yours,
Steffen

--
IPB Halle                    AG Massenspektrometrie & Bioinformatik
Dr. Steffen Neumann          http://www.IPB-Halle.DE
Weinberg 3                   http://msbi.bic-gh.de
06120 Halle                  Tel. +49 (0) 345 5582 - 1470
+49 (0) 345 5582 - 0
sneumann(at)IPB-Halle.DE     Fax. +49 (0) 345 5582 - 1409
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 819 bytes
Desc: This is a digitally signed message part
URL: <http://lists.r-forge.r-project.org/pipermail/rcpp-devel/attachments/20140708/c3a219bf/attachment.sig>