R help - Sep 2004 - Looking for .Call functions

Hi,

In my ongoing quest to track down the source of an error (see message "[R]
optim error in arima" above), I find in the cource code for arima0 the
following:

     arma0f <- function(p) {
         par <- as.double(fixed)
         par[mask] <- p
         .Call("arma0fa", G, par, PACKAGE = "stats")
     }

I would like to know what the function "arma0f" does.  Does the above
mean that there is a function called "arma0fa" somewhere in R?  Where
is it?  I couldn't find anything in Rinternals.h.


Thanks,

Nate

Nathaniel B. Derby wrote:
> Hi,
> 
> In my ongoing quest to track down the source of an error (see message 
> "[R] optim error in arima" above), I find in the cource code for
arima0
> the following:
> 
>     arma0f <- function(p) {
>         par <- as.double(fixed)
>         par[mask] <- p
>         .Call("arma0fa", G, par, PACKAGE = "stats")
>     }
> 
> I would like to know what the function "arma0f" does.  Does the
above
> mean that there is a function called "arma0fa" somewhere in R? 
Where is
> it?  I couldn't find anything in Rinternals.h.
It means that in one of the .c source files in 
$RSRC/src/library/stats/src there will be a C function declared as

SEXP arma0fa(SEXP, SEXP);

(In fact it is declared in ts.h and defined in pacf.c in that directory)

You need to download the source for R.  C source is not included with binary
distributions.

Andy
> From: Nathaniel B. Derby
> 
> Hello,
> 
> Thanks for the help.  Unfortunately, my version of R (1.9.1) 
> doesn't have that directory (i.e., within $RSRC\src\library, 
> there is just a subdirectory entitled "windlgs"), and has 
> neither ts.h nor pacf.c in any of its directories.  Could it 
> be that this function is embedded inside a .dll file (like stats.dll)?
> 
> 
> thanks,
> 
> Nate
> 
> 
> > It means that in one of the .c source files in 
> $RSRC/src/library/stats/src 
> > there will be a C function declared as
> >
> > SEXP arma0fa(SEXP, SEXP);
> >
> > (In fact it is declared in ts.h and defined in pacf.c in 
> that directory)
> 
> 
> > Nathaniel B. Derby wrote:
> >> Hi,
> >> 
> >> In my ongoing quest to track down the source of an error 
> (see message "[R] 
> >> optim error in arima" above), I find in the cource code 
> for arima0 the 
> >> following:
> >> 
> >>     arma0f <- function(p) {
> >>         par <- as.double(fixed)
> >>         par[mask] <- p
> >>         .Call("arma0fa", G, par, PACKAGE =
"stats")
> >>     }
> >> 
> >> I would like to know what the function "arma0f" does.  
> Does the above mean 
> >> that there is a function called "arma0fa" somewhere in
R?
> Where is it?  I 
> >> couldn't find anything in Rinternals.h.
> 
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