I tried all of them still its not working. 
    $command ="nice R --slave --args $DirName $SubDirName < read_param
+eters_by_file_batch.R > $SubDir?outR.txt";
            my $oput=`$command`;

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I am lost

In reply to Re^2: How to redirect the output of system call by advait
in thread How to redirect the output of system call by advait

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