[Rd] Creating data.frame from c-language
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? Thanks! [[alternative HTML version deleted]] __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
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, rip...@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, UKFax: +44 1865 272595 __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
[Rd] broken link in docs for Binormial functions
On the local documentation page for Binomial, i.e. http://127.0.0.1:/library/stats/html/Binomial.html The link to Catherine Loader's paper "Catherine Loader (2000). *Fast and Accurate Computation of Binomial Probabilities*; available from http://www.herine.net/stat/software/dbinom.html."; appears to be broken. Kind regards, Seán [[alternative HTML version deleted]] __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] Creating data.frame from c-language
On 10 August 2013 at 14:17, Prof Brian Ripley wrote:
| 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).
Or if C++ is an option for you, below if a six-line Rcpp source example:
R> sourceCpp("/tmp/dataframe.cpp") ## see the file below
R> set.seed(42); getDataFrame(5)## set RNG seed, request a dataframe
ab
1 1.370958 0.457742
2 -0.564698 0.719112
3 0.363128 0.934672
4 0.632863 0.255429
5 0.404268 0.462293
R>
The source file used above follows below.
Dirk
#include
using namespace Rcpp;
// [[Rcpp::export]]
DataFrame getDataFrame(int n) {
NumericVector a = rnorm(n);
NumericVector b = runif(n);
return DataFrame::create(Named("a") = a,
Named("b") = b);
}
--
Dirk Eddelbuettel | e...@debian.org | http://dirk.eddelbuettel.com
__
R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] broken link in docs for Binormial functions
On 10/08/2013 14:48, Sean O'Riordain wrote: On the local documentation page for Binomial, i.e. http://127.0.0.1:/library/stats/html/Binomial.html The link to Catherine Loader's paper "Catherine Loader (2000). *Fast and Accurate Computation of Binomial Probabilities*; available from http://www.herine.net/stat/software/dbinom.html."; appears to be broken. And what should it be replaced by? (We've fixed this up at least once before.) As Berners-Lee says, URIs should be permanent Kind regards, Seán [[alternative HTML version deleted]] __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel -- Brian D. Ripley, rip...@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, UKFax: +44 1865 272595 __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] broken link in docs for Binormial functions
On Aug 10, 2013, at 20:11 , Prof Brian Ripley wrote: > On 10/08/2013 14:48, Sean O'Riordain wrote: >> On the local documentation page for Binomial, i.e. >> http://127.0.0.1:/library/stats/html/Binomial.html >> >> The link to Catherine Loader's paper >> "Catherine Loader (2000). *Fast and Accurate Computation of Binomial >> Probabilities*; available from >> http://www.herine.net/stat/software/dbinom.html."; >> >> appears to be broken. > > And what should it be replaced by? (We've fixed this up at least once > before.) > > As Berners-Lee says, URIs should be permanent It can be dug up via Google Scholar fairly easily, but the link goes to an attachment to an Octave enhancement request! Perhaps we should ask permission to nail the thing down somewhere on r-project.org? -pd (Berners-Lee et al. never foresaw the chaos created by the commercialization of the web, or indeed of other academic infrastructures. Try locating Catherine herself or even the stats department at CWRU to see what I mean.) -- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Email: pd@cbs.dk Priv: pda...@gmail.com __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] broken link in docs for Binormial functions
On Aug 10, 2013, at 11:11 AM, Prof Brian Ripley wrote: > On 10/08/2013 14:48, Sean O'Riordain wrote: >> On the local documentation page for Binomial, i.e. >> http://127.0.0.1:/library/stats/html/Binomial.html >> >> The link to Catherine Loader's paper >> "Catherine Loader (2000). *Fast and Accurate Computation of Binomial >> Probabilities*; available from >> http://www.herine.net/stat/software/dbinom.html."; >> >> appears to be broken. > > And what should it be replaced by? (We've fixed this up at least once > before.) A copy can be had at: http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CC0QFjAA&url=http%3A%2F%2Fprojects.scipy.org%2Fscipy%2Fraw-attachment%2Fticket%2F620%2Floader2000Fast.pdf&ei=Q4cGUpuGA8qWyAHN6ICgAQ&usg=AFQjCNG2mDFe3iE0Xahyl0d6f2cazTKgFQ&sig2=Ghc7H91rILXLrBLlJjQTJA Ugggh. Does anyone else hate the Google encoding that was adopted a couple of years ago? http://projects.scipy.org/scipy/raw-attachment/ticket/620/loader2000Fast.pdf > > As Berners-Lee says, URIs should be permanent > >> >> Kind regards, >> Seán >> >> [[alternative HTML version deleted]] >> >> -- David Winsemius Alameda, CA, USA __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
