src/test/scripts/functions/lineage/LineageTraceFun1.dml

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foo = function(Matrix[Double] X, Matrix[Double] Y) 
  return (Matrix[Double] R, Matrix[Double] S)
{
  if( sum(X) > 0 ) {
	  R = X + X/2 + X/3 + Y;
	  S = Y + Y/2 + Y/3 + X;
	}
	else {
	  R = X - 1;
	  S = Y - 1;
	}
}

X = rand(rows=$3, cols=$4, min=-1, max=10, seed=7);
Y = X^2;
[R, S] = foo(Y, X);
R = R - S;

#print(lineage(R));
write(R, $2);