Your linux operating system may already be configured to use the OpenBLAS library. Therefore, most likely R will already be linked to this library. To find out if the R language is using the OpenBLAS library, at R, do:
If R is using the OpenBLAS library, something like
/any_directory/libopenblas.so should be returned. Therefore, there should be the name openblas in the shared object returned (file extension .so).
ropenblas() function can identify that the R language is using the version of OpenBLAS you wish to configure, a warning message will be returned asking if you really would like to proceed with the configuration again.
ropenblas() function will download the desired version of the library OpenBLAS, compile and install the library in the
/opt directory of your operational system. If the directory does not exist, it will be created so that the installation can be completed. Subsequently, files from the version of BLAS used in R will be symbolically linked to the shared object files of the library version OpenBLAS compiled and installed in
You must be the operating system administrator to use this library. Therefore, do not attempt to use it without telling your system administrator. If you have the ROOT password, you will be responsible for everything you do on your operating system.
You will not necessarily have to run
ropenblas() on every section of R. Almost always it will not be necessary. However, it may be that the R is updated by the operating system (GNU/Linux). Thus, it may be that in this update the R unlink with the OpenBLAS library. Therefore, from time to time check using the command
extSoftVersion()["BLAS"] if the link with OpenBLAS is correct, otherwise run the command