[Rd] Registering S3 class from external package

[Paul Roebuck]

The package I'm working on can extract data from external
packages but would otherwise have no dependency on them.
However, I desire to be able to dispatch based on an
external S3 class if its package is attached (.First.lib).
My code is S4-based and its package has NAMESPACE.

Registering the external class prior to the other
package being attached doesn't seem to work so I am
attempting to perform the registration once the other
package has done so. But my namespace is locked by the
time this occurs. Can someone either tell me how to do
this, suggest a better alternative, or point me to
another package that does something similar?

Current attempt is something like the following:

  setHook(packageEvent("somepkg", "attach"),
  function(...) {
  cat("* Register", sQuote("oldstyle"),
  "as S3 class", "\n")
  setOldClass(c("oldstyle", "data.frame"),
  where = asNamespace("mypkg"))
  })


-
> require(mypkg)
Loading required package: mypkg
...
> require(somepkg)
Loading required package: somepkg
* Register 'oldstyle' as S3 class
Error in assign(classMetaName(Class), def, where) :
cannot add bindings to a locked environment
> R.version.string
[1] "R version 2.1.1, 2005-06-20"

--
SIGSIG -- signature too long (core dumped)

__
R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel

[Rd] include C functions from nmath in my own C functions

[yyan liu]

 Hi:
  I followed the README in src/nmath/standalone/
 to make the use the command "make shared" to make the
 libRmath.so file. I also add the directories containg
 libRmath.so to  LD_LIBRARY_PATH by using command
 "export
D_LIBRARY_PATH=$LD_LIBRARY_PATH:$/home/zhliu/Backup/R-2.0.1/src/nmath/standalon
e
 "
 However, when I try to run the following codes by the
command "gcc test.c -lRmath" on Linux Fedora Core 2,
 /***/
/* file name test.c */
 #define MATHLIB_STANDALONE 1
 #include 

 int
 main()
 {
 /* something to force the library to be included */
qnorm(0.7, 0.0, 1.0, 0, 0);
return 0;
 }
 /**/

 the compiler gives me the following error message. It
seems definitions of some R functions can not be found
in the libRmath.so file. Anyone has any idea about
this
problem? Thank you very much!


 /usr/local/lib/libRmath.so: undefined reference to
 `expm1'
 /usr/local/lib/libRmath.so: undefined reference to
 `log'
 /usr/local/lib/libRmath.so: undefined reference to
 `sqrt'
 /usr/local/lib/libRmath.so: undefined reference to
 `rint'
 /usr/local/lib/libRmath.so: undefined reference to
 `cos'
 /usr/local/lib/libRmath.so: undefined reference to
 `sin'
 /usr/local/lib/libRmath.so: undefined reference to
 `pow'
 /usr/local/lib/libRmath.so: undefined reference to
 `sinh'
 /usr/local/lib/libRmath.so: undefined reference to
 `log10'
 /usr/local/lib/libRmath.so: undefined reference to
 `exp'
 /usr/local/lib/libRmath.so: undefined reference to
 `tan'
 /usr/local/lib/libRmath.so: undefined reference to
 `log1p'
 /usr/local/lib/libRmath.so: undefined reference to
 `hypot'
 collect2: ld returned 1 exit status

__
R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel

Re: [Rd] include C functions from nmath in my own C functions

[Douglas Bates]

On 8/11/05, yyan liu <[EMAIL PROTECTED]> wrote:
>  Hi:
>   I followed the README in src/nmath/standalone/
>  to make the use the command "make shared" to make the
>  libRmath.so file. I also add the directories containg
>  libRmath.so to  LD_LIBRARY_PATH by using command
>  "export
> D_LIBRARY_PATH=$LD_LIBRARY_PATH:$/home/zhliu/Backup/R-2.0.1/src/nmath/standalon
> e
>  "
>  However, when I try to run the following codes by the
> command "gcc test.c -lRmath" on Linux Fedora Core 2,
>  /***/
> /* file name test.c */
>  #define MATHLIB_STANDALONE 1
>  #include 
> 
>  int
>  main()
>  {
>  /* something to force the library to be included */
> qnorm(0.7, 0.0, 1.0, 0, 0);
> return 0;
>  }
>  /**/
> 
>  the compiler gives me the following error message. It
> seems definitions of some R functions can not be found
> in the libRmath.so file. Anyone has any idea about
> this
> problem? Thank you very much!
> 
> 
>  /usr/local/lib/libRmath.so: undefined reference to
>  `expm1'
>  /usr/local/lib/libRmath.so: undefined reference to
>  `log'
>  /usr/local/lib/libRmath.so: undefined reference to
>  `sqrt'
>  /usr/local/lib/libRmath.so: undefined reference to
>  `rint'
>  /usr/local/lib/libRmath.so: undefined reference to
>  `cos'
>  /usr/local/lib/libRmath.so: undefined reference to
>  `sin'
>  /usr/local/lib/libRmath.so: undefined reference to
>  `pow'
>  /usr/local/lib/libRmath.so: undefined reference to
>  `sinh'
>  /usr/local/lib/libRmath.so: undefined reference to
>  `log10'
>  /usr/local/lib/libRmath.so: undefined reference to
>  `exp'
>  /usr/local/lib/libRmath.so: undefined reference to
>  `tan'
>  /usr/local/lib/libRmath.so: undefined reference to
>  `log1p'
>  /usr/local/lib/libRmath.so: undefined reference to
>  `hypot'
>  collect2: ld returned 1 exit status
> 
> __
> R-devel@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel

Add -lm to the end of the call to gcc.  You are missing functions from
the math library.

__
R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel