[R-SIG-Mac] Lapack errors on Mac but not on Linux

[Gad Abraham]

Prof Brian Ripley wrote:
>> Is this an issue with the Apple-supplied Lapack?
> 
> Or the Apple-supplied BLAS.
> 
> You have not told us how R was built on your machine, but if this was 
> the CRAN build you have a choice of BLAS.  (See the list archives, but 
> AFAIR, you can swap links between libRblas.0dylib and 
> libRblas.veclib.dylib in 
> /Library/Frameworks/R.framework/Resources/lib.)  (On that build AFAICS 
> the Lapack used is the R one.)

Both are from CRAN.

> 
> I think your example is actually random (it uses 10-fold CV?) in which 
> case that might have been the difference between machines.

I get consistent failures on Mac, and it works consistently on Linux.

> 
> With a lot of patience, I got the example to run on my own build which 
> uses the recipe in the R-admin manual (veclib for both BLAS and LAPACK). 
> With the CRAN build of R using libRblas.0.dylib, it ran for a lot longer 
> than with libRblas.veclib.dylib, but eventually gave the same error.
> 

For me, switching to libRblas.0.dylib seems to solve the problem, no 
more LAPACK errors. Is this a permanent solution? Will switching BLAS 
break anything in the Accelerate framework?

Thanks,
Gad


-- 
Gad Abraham
Dept. CSSE and NICTA
The University of Melbourne
Parkville 3010, Victoria, Australia
email: gabraham at csse.unimelb.edu.au
web: http://www.csse.unimelb.edu.au/~gabraham