[Rd] Help: Where can I find the code for 'C_Cdqrls'?

Prof Brian Ripley ripley at stats.ox.ac.uk
Tue Apr 23 15:01:40 CEST 2013

First, it is not a function.  It is an R object in the stats namespace 
and you can look at it like any other object:

 > stats:::C_Cdqrls
[1] "Cdqrls"

<pointer: 0x7f8483499750>
[1] "RegisteredNativeSymbol"

DLL name: stats
Filename: /Users/ripley/R/R-devel/library/stats/libs/stats.so
Dynamic lookup: FALSE

[1] 3

[1] "CallRoutine"      "NativeSymbolInfo"

That tells you it is invoking a C function called Cdqrls: you can search 
from that in the sources for package stats.  In fact it is in 
src/library/stats/src/lm.c .

You would know to look in the stats namespace since you found this in a 
function from that namespace.

Generally R's own code uses the convention of object C_foo for C entry 
point foo and F_bar for Fortran entry point bar (but there are 
exceptions, more so in R < 3.0.0).

On 23/04/2013 08:35, 赵自强 wrote:
> Dear all,
>                  I’m not sure if it is O.K. to ask this question here.
>                  But where can I find the code for the function ‘C_Cdqrls’ which is called by the R function ‘lsfit‘.
>                  Thank you all.
>                  Sorry for being naïve if so.
> --------------------
> Ziqiang Zhao
> 2013-04-23
> 	[[alternative HTML version deleted]]
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel

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

More information about the R-devel mailing list