[Rcpp-devel] Internals: how does DataFrame get initialized?

[Davor Cubranic]

It also includes "DataFrame_generated.h", which contains
automatically generated constructors with 1 to X (currently X=20)
"Named" arguments.

See it directly in the Subversion repo at R-Forge:

https://r-forge.r-project.org/scm/viewvc.php/pkg/Rcpp/inst/include/Rcpp/?root=r$

Davor


On Wed, 29 Feb 2012, Darren Cook wrote:

> I wanted to understand what this code [1] actually does:
>
> std::vector<double> vt, vpx, vsz;
> std::vector<std::string> vsrc, vtype;
> ...
> Rcpp::DataFrame df = Rcpp::DataFrame::create(
>    Rcpp::Named("t", vt),
>    Rcpp::Named("type", vtype),
>    Rcpp::Named("src", vsrc),
>    Rcpp::Named("px", vpx),
>    Rcpp::Named("sz", vsz)
>    );
>
> Rcpp::Named(x,y) was easy [2]: it makes a little object that just stores
> references to the two variables.
>
> Understanding Rcpp::DataFrame::create() was harder [3], with 5
> constructors, none of which seem like they would do the job. Can someone
> give me a pointer to what I should study next.
>
> TIA,
>
> Darren
>
>
> [1]: Extracted from:
>
> http://lists.r-forge.r-project.org/pipermail/rcpp-devel/2012-January/003345.html
>
> [2]:
> http://dirk.eddelbuettel.com/code/rcpp/html/Named_8h_source.html
> http://dirk.eddelbuettel.com/code/rcpp/html/named__object_8h_source.html
>
> [3]:
> http://dirk.eddelbuettel.com/code/rcpp/html/DataFrame_8h_source.html
>
> -- 
> Darren Cook, Software Researcher/Developer
>
> http://dcook.org/work/ (About me and my work)
> http://dcook.org/blogs.html (My blogs and articles)
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