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Toralf Kirsten

2004-Jun-22 18:51 UTC

[Rd] function not in load table

Hi,
I apologize for this often/old question. I found some hints but couldn't 
solve the problem so far.

I have C functions (incl. the header files) as well as the R wrapper 
functions which I want to use for faster calculations. These functions 
are included in a R package.
The installation process seems to be ok (no errors). I also can load the 
package without errors. But when I call the function I got the following 
error
 > wy.result <- wy.grps(data1=X1, grpdata=groups, nres=10000, 
alpha1=0.05, alpha2=0.05)
Error in .C("wy_grps_R", as.double(X), as.integer(n1), as.integer(n2),
:
         C function name not in load table
Execution halted

The parameter are
data1 - result of read.table()
grpdata - dito
nres - integer
alpha1 nad alpha1 - factors (float)

In the R function wy.grps(...) the C function is called by using the 
statement

result <- .C("wy_grps_R",
              as.double(X),
              as.integer(n1),
              as.integer(n2),
              as.integer(p),
              as.integer(unlist(grpidx)),
              as.integer(grplen),
              as.integer(grpnum),
              as.character(WYFUN),
              as.double(alpha2),
              as.character(MINMAXFUN),
              WYdist=double(nres),
              as.integer(nres),
              test.value=double(grpnum),
              p.value=double(grpnum))


My .First.lib.R is as follows:
.First.lib <- function(libname, pkgname) {
   library.dynam("izbi", package = pkgname, lib.loc = libname)
   data(COLS, package=pkgname)
   data(ROWS, package=pkgname)
   if (exists(".Dyn.libs")) remove(".Dyn.libs")
   if (interactive() && getenv("DISPLAY") != "")
x11()
}

I read something about R_CMethodDef in "Writing R Extensions" but
I'm
not really sure where I should write it, may in the .First.lib.R or in a 
separate file?
Any other possible mistakes?

We are using R 1.9.0 on Fedora Linux.

Thanks a lot, Toralf

Vadim Ogranovich

2004-Jun-22 19:22 UTC

head link

[Rd] function not in load table

.C has a named argument 'PACKAGE', which you didn't set. I usually
have
such an error when I forget about the argument. 
> -----Original Message-----
> From: r-devel-bounces@stat.math.ethz.ch 
> [mailto:r-devel-bounces@stat.math.ethz.ch] On Behalf Of Toralf Kirsten
> Sent: Tuesday, June 22, 2004 9:53 AM
> To: r-devel@stat.math.ethz.ch
> Subject: [Rd] function not in load table
> 
> Hi,
> I apologize for this often/old question. I found some hints 
> but couldn't solve the problem so far.
> 
> I have C functions (incl. the header files) as well as the R 
> wrapper functions which I want to use for faster 
> calculations. These functions are included in a R package.
> The installation process seems to be ok (no errors). I also 
> can load the package without errors. But when I call the 
> function I got the following error  > wy.result <- 
> wy.grps(data1=X1, grpdata=groups, nres=10000, alpha1=0.05, 
> alpha2=0.05) Error in .C("wy_grps_R", as.double(X), 
> as.integer(n1), as.integer(n2),  :
>          C function name not in load table Execution halted
> 
> The parameter are
> data1 - result of read.table()
> grpdata - dito
> nres - integer
> alpha1 nad alpha1 - factors (float)
> 
> In the R function wy.grps(...) the C function is called by 
> using the statement
> 
> result <- .C("wy_grps_R",
>               as.double(X),
>               as.integer(n1),
>               as.integer(n2),
>               as.integer(p),
>               as.integer(unlist(grpidx)),
>               as.integer(grplen),
>               as.integer(grpnum),
>               as.character(WYFUN),
>               as.double(alpha2),
>               as.character(MINMAXFUN),
>               WYdist=double(nres),
>               as.integer(nres),
>               test.value=double(grpnum),
>               p.value=double(grpnum))
> 
> 
> My .First.lib.R is as follows:
> .First.lib <- function(libname, pkgname) {
>    library.dynam("izbi", package = pkgname, lib.loc = libname)
>    data(COLS, package=pkgname)
>    data(ROWS, package=pkgname)
>    if (exists(".Dyn.libs")) remove(".Dyn.libs")
>    if (interactive() && getenv("DISPLAY") !=
"") x11() }
> 
> I read something about R_CMethodDef in "Writing R Extensions" 
> but I'm not really sure where I should write it, may in the 
> .First.lib.R or in a separate file?
> Any other possible mistakes?
> 
> We are using R 1.9.0 on Fedora Linux.
> 
> Thanks a lot, Toralf
> 
> ______________________________________________
> R-devel@stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-devel
> 
>

Martin Maechler

2004-Jun-23 10:08 UTC

head link

[Rd] function not in load table

>>>>> "Toralf" == Toralf Kirsten
<tkirsten@izbi.uni-leipzig.de>
>>>>>     on Tue, 22 Jun 2004 18:52:51 +0200 writes:

    Toralf> I apologize for this often/old question. I found
    Toralf> some hints but couldn't solve the problem so far.

    Toralf> I have C functions (incl. the header files) as well

really C, not C++ ?
[or did you compile by a C++ compiler instead of C ?]
I ask because for C++ that's really a FAQ

    Toralf> as the R wrapper functions which I want to use for
    Toralf> faster calculations. These functions are included in
    Toralf> a R package.  The installation process seems to be
    Toralf> ok (no errors). I also can load the package without
    Toralf> errors. But when I call the function I got the
    Toralf> following error

    Toralf> wy.result <- wy.grps(data1=X1, grpdata=groups, nres=10000, 
    Toralf> alpha1=0.05, alpha2=0.05)
    Toralf> Error in .C("wy_grps_R", as.double(X), as.integer(n1),
as.integer(n2),  :
    Toralf> C function name not in load table
    Toralf> Execution halted

this really means that there's no exported C function named
'wy_grps_R'
from the dyn.loaded C code.
Do
	nm -g  izbi.so
inside izbi/src/ in the shell to check.


    Toralf> The parameter are
    Toralf> data1 - result of read.table()
    Toralf> grpdata - dito
    Toralf> nres - integer
    Toralf> alpha1 nad alpha1 - factors (float)

    Toralf> In the R function wy.grps(...) the C function is called by using
the
    Toralf> statement

    Toralf> result <- .C("wy_grps_R",
    Toralf> as.double(X),
    Toralf> as.integer(n1),
    Toralf> as.integer(n2),
    Toralf> as.integer(p),
    Toralf> as.integer(unlist(grpidx)),
    Toralf> as.integer(grplen),
    Toralf> as.integer(grpnum),
    Toralf> as.character(WYFUN),
    Toralf> as.double(alpha2),
    Toralf> as.character(MINMAXFUN),
    Toralf> WYdist=double(nres),
    Toralf> as.integer(nres),
    Toralf> test.value=double(grpnum),
    Toralf> p.value=double(grpnum))

Vadim mentions that you should add  PACKAGE= "<pkgname>"  here
which is true but not related to your problem.

    Toralf> My .First.lib.R is as follows:
    Toralf> .First.lib <- function(libname, pkgname) {
    Toralf> library.dynam("izbi", package = pkgname, lib.loc =
libname)
    Toralf> data(COLS, package=pkgname)
    Toralf> data(ROWS, package=pkgname)

    Toralf> if (exists(".Dyn.libs")) remove(".Dyn.libs")

not sure if the above is a good idea.
What do you want it for?

    Toralf> if (interactive() && getenv("DISPLAY") !=
"") x11()
    Toralf> }


    Toralf> I read something about R_CMethodDef in "Writing R
    Toralf> Extensions" but I'm not really sure where I should
    Toralf> write it, may in the .First.lib.R or in a separate
    Toralf> file?

That's something else nice -- but all happens on the C level.
For an example of this see in the R sources
  R-1.9.1/src/library/stats/src/init.c

Martin Maechler

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