either:
Error in (function (..., row.names = NULL, check.rows = FALSE, check.names = TRUE, :
arguments imply differing number of rows: 0, 2740
In addition: Warning message:
In mclapply(1:length(gfactor$factor), function(k) { :
scheduled core 1 did not deliver a result, all values of the job will be affected
or
Error in mcfork() :
unable to fork, possible reason: Cannot allocate memory
and this code works fine on my pc.... :\