This is untested since I don't have R, but something like this ought to work: 
open my $proc, "| R" or die "cannot open process R: $!";
autoflush $proc;
print $proc "source(\"commands.R\")\n";
close $proc;

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This forks off a subprocess running R and then writes the command to its standard input through a pipe. This assumes that R is able to accept input through a pipe (ie it doesn't presume a terminal), but it will probably work. See perlopentut for more.

In reply to Re: Perl & R ? by Errto
in thread Perl & R ? by Jaya

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