The ROWVEC function is part of the IMLMLIB library. The ROWVEC function returns a vector. The specified matrix is converted into a row vector in row-major order. The returned vector has 1 row and columns. The first elements in the vector correspond to the first row of the input matrix, the next elements correspond to the second row, and so on, on, as shown in the following example.

x = {1 2 3,
     4 5 6};
y = rowvec(x);
print y;