R help - Mar 2005 - The corresponding Fortran77 codes for R function pt()

Hi,

I'm trying to find the corresponding Fortran77 subroutines for R 
function pt(). I tried some Fortran77 subroutines to compute the t 
distribution function. But none of them are as good as R function pt(). 
Does anyone can give me some information about it?

Thank you very much!

Tianyue

The routine "pt" is in the numerical mathematics library, in src/nmath
if
you untar the source distribution of R. It's in C, though, not Fortran. You
can write Fortran wrappers for it.

Reid Huntsinger

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of tianyue
Sent: Monday, March 14, 2005 12:58 PM
To: r-help at stat.math.ethz.ch
Subject: [R] The corresponding Fortran77 codes for R function pt()


Hi,

I'm trying to find the corresponding Fortran77 subroutines for R 
function pt(). I tried some Fortran77 subroutines to compute the t 
distribution function. But none of them are as good as R function pt(). 
Does anyone can give me some information about it?

Thank you very much!

Tianyue

______________________________________________
R-help at stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html

On Mon, 14 Mar 2005, tianyue wrote:
> Hi,
>
> I'm trying to find the corresponding Fortran77 subroutines for R
function
> pt(). I tried some Fortran77 subroutines to compute the t distribution 
> function. But none of them are as good as R function pt(). Does anyone can 
> give me some information about it?
>
There is no Fortran subroutine (although some of the C functions are 
translations of Fortran).  The C code is in any R source distribution, in 
src/nmath/pt.c.  It also calls src/nmath/pbeta.c. The comments in the 
code say where the algorithms came from.


 	-thomas

tianyue wrote:
> Hi,
> 
> I'm trying to find the corresponding Fortran77 subroutines for R 
> function pt(). I tried some Fortran77 subroutines to compute the t 
> distribution function. But none of them are as good as R function pt(). 
> Does anyone can give me some information about it?
Well, you can download the sources and take a look...
Who told you that it is in Fortran?

Uwe Ligges


> Thank you very much!
>
> Tianyue
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide! 
> http://www.R-project.org/posting-guide.html

On Mon, 14 Mar 2005 11:57:39 -0600, tianyue <tzhou1 at uiuc.edu> wrote :
>Hi,
>
>I'm trying to find the corresponding Fortran77 subroutines for R 
>function pt(). I tried some Fortran77 subroutines to compute the t 
>distribution function. But none of them are as good as R function pt(). 
>Does anyone can give me some information about it?
Others have pointed you to the source code for that function.  You may
also want to call it directly:  R exports some functions with C
interfaces (that should be callable from Fortran, too).  See the R API
chapter in the Writing R Extensions manual.

Duncan Murdoch