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This is an interface to R for J64 on Windows/Mac/Linux.
J loads a shared library to call R installed on the same machine.
Either R should be on the path, or the R_HOME environment variable should be set when calling J, as in:
SET R_HOME="c:\Program Files\R\R-3.3.2" windows export R_HOME=/usr/lib/R linux
Note - in recent versions of J and Windows, it may be necessary to set the full path to R instead of, or as well as, R_HOME. Experiment to see which works. For example, replace the R_HOME line with:
set PATH=%PATH%;C:\Program Files\R\R-3.3.2\bin\x64
The shared libraries are distributed in ~addons/stats/r/lib with source in the Public repository at stats/r/rserver/lib.