[Rd] Creating data.frame from c-language
baronshtam at lightminersystems.com
Mon Aug 12 18:24:36 CEST 2013
Dear Professor Brian D. Ripley,
Thank you for your reply. Yes, the speed is essential and data is large (gigabytes). I would like to learn from stats/src/model.c. Where can I find it?
From: Prof Brian Ripley [mailto:ripley at stats.ox.ac.uk]
Sent: Saturday, August 10, 2013 6:18 AM
To: Boris Aronshtam
Cc: r-devel at r-project.org
Subject: Re: [Rd] Creating data.frame from c-language
On 09/08/2013 22:48, Boris Aronshtam wrote:
> I need to create a data.frame from C-language and populate it. I Know how to create lists from C, but I cannot figure out how to create a data.frame. Does anyone have a sample code for creating a data.frame, setting column names, and populating it with data?
Use data.frame() via an eval() call from C.
Or see the code is stats/src/model.c, as part of model.frame.default (but I would only do that if speed were essential).
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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