Swapping Revolution R optimized MKL Blas libraries

Revolution R ships with optimized Intel MKL Blas libraries and a different version of Lapack than is used with CRAN-R by default. For most computations you can do in R these will be faster than the default ones shipped with CRAN-R. However, this is not the case for all computations. As well, some third-party R packages may not be compatible with the MKL Blas libraries. In these cases, you may want to revert to the default libraries shipped with CRAN-R.

Below are examples on how to perform this swap for Revolution R Enterprise 7.1. Note that the CRAN-R libraries must come from the same level of R as that shipped with Revolution R. For versions 7.1, this is R 3.0.2.

Windows:

1. Rename 'Rblas.dll' to 'Rblas.dll.RevoR' and 'Rlapack.dll' to 'Rlapack.dll.RevoR' in the folder  'C:\Revolution\R-Enterprise-7.1\R-3.0.2\bin\x64'.
2. Copy Rblas.dll and Rlapack.dll from the <R_HOME>\lib directory of a CRAN-R 3.0.2 installation to C:\Revolution\R-Enterprise-7.1\R-3.0.2\bin\x64.
3. Restart Revolution R Enterprise, for the changes to take effect.

Linux:

1. Rename libRblas.so and libRlapack.so in /usr/lib64/Revo-7.1/R-3.0.2/lib64/R/lib:
   

   # mv /usr/lib64/Revo-7.1/R-3.0.2/lib64/R/lib/libRblas.so /usr/lib64/Revo-7.1/R-3.0.2/lib64/R/lib/libRblas.so.RevoR
   # mv /usr/lib64/Revo-7.1/R-3.0.2/lib64/R/lib/libRlapack.so /usr/lib64/Revo-7.1/R-3.0.2/lib64/R/lib/libRlapack.so.RevoR
   

2. Copy libRblas.so and libRlapack.so from the <R_HOME>/lib directory of a CRAN-R 3.0.2 installation to /usr/lib64/Revo-7.1/R-3.0.2/lib64/R/lib.
3. Restart Revolution R Enterprise, for the changes to take effect.