To call R from within Matlab, you will need to have R compiled as a shared library. This needs to be done when compiling R from source (or via one of the binary distributions that have support for this.) Download the R source from cran.r-project.org. tar zxf R-2.0.0.tar.gz ./configure --enable-R-shlib make Then, ensure that this version of R is in your path. Either install it or put the bin/ directory in your path. Install the RMatlab package as a regular R package. R CMD INSTALL RMatlab. ================================================================ Running RMatlab. Tell matlab to look for MEX files in the directory /RMatlab/libs Use the MATLABPATH environment variable for this. Add $R_HOME/lib/ to the LD_LIBRARY_PATH environment variable so that the operating system can find the libR.so file at run-time. The scripts RMatlab.csh (tcsh or csh shells) or RMatlab.sh (Bourne (sh) or Bash (bash) shells) in the scripts/ directory of the _installed_ R package will set things correctly for you. Just source them into your shell: source RMatlab.csh or . RMatlab.sh depending on which type of shell you are using. Set the location of the R installation so that the R engine can find its code. setenv R_HOME `R RHOME` Set the environment variable LD_LIBRARY_PATH to setenv LD_LIBRARY_PATH $R_HOME/lib (or $R_HOME/bin for versions of R pre 2.0.0) Initialize the R engine. x = initializeR({'Rmatlab' '--no-save', '--silent'}) Note that the arguments are given using a Matlab cell ({}) rather than a matrix. Any number of recognized arguments can be passed to R just as one would invoke it from the command line. Call a simple R function. o = callR('date') o = callR('rnorm', 10) # generate 50 Normal deviates from N(100, 1) o = callR('rnorm', 50, 100) # Poisson random variable. o = callR('rpois', 50, 3) Calling Matlab from within R. First, set the LD_LIBRARY_PATH environment variable to find the relevant Matlab shared libraries. On Linux, this is /bin/glnx86 Now, run R. > library(RMatlab) > .MatlabInit() > .Matlab('magic', 3) To call Matlab from R that is already within a Matlab session (i.e. starting from Matlab and calling an R function that itself calls Matlab), you can use .MatlabMexCall rather than .Matlab. In the future, there will be numerous other functions that one can access and the package will automatically understand which version to use. DTL (Nov, 2 2004)