src/test/scripts/functions/frame/ParforFrameIntermediates.dml

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F = read($1, data_type="frame", format="csv");

parfor(i in 1:ncol(F)) {
  Fi = F[, i];
  Mi = as.matrix(Fi) + 7;
  Fi2 = as.frame(Mi);
  print(toString(Fi2[1:2,]));
}