[R] Using LAPACK in C-code to be loaded in R - getting-started-help

[Søren Højsgaard]

I want to speed up computations (involving matrices) by writing some C-code to 
be loaded. In the C-code, I need to invert matrices etc. As I've understood the 
writing R extensions doc, I can use use #include R_ext/Linpack.h in my 
.c-file and get access to linpack's facilities within my C-code. 
 
Is that correct?
 
If so, can anyone point me to examples on how this is actually done in practice?
 
Best regards
Søren

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Re: [R] Using LAPACK in C-code to be loaded in R - getting-started-help

[Prof Brian Ripley]

Are you talking about LAPACK (title) or LINPACK (body)?

On Mon, 20 Feb 2006, Søren Højsgaard wrote:

I want to speed up computations (involving matrices) by writing some 
C-code to be loaded. In the C-code, I need to invert matrices etc. As 
I've understood the writing R extensions doc, I can use use #include 
R_ext/Linpack.h in my .c-file and get access to linpack's facilities 
within my C-code.


Is that correct?


Only for some of the functions listed in that file: please consult it.

If so, can anyone point me to examples on how this is actually done in 
practice?


On CRAN,

Linpack: RandomFields fracdiff glmmML mgcv
LAPACK: lots, e.g, MNP kernlab knncat rmetasim supclust

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Brian D. Ripley,  [EMAIL PROTECTED]
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