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!include once #1035331 // EJML Include (Matrix library)

static double[] ejmlMatrixToVector(DMatrixRMaj matrix) {
  int w = matrix.getNumCols(), h = matrix.getNumRows();
  if (w == 1) {
    double[] vector = new double[h];
    for i to h:
      vector[i] = matrix.get(i, 0);
    ret vector;
  } else if (h == 1) {
    double[] vector = new double[w];
    for i to w:
      vector[i] = matrix.get(0, i);
    ret vector;
  } else
    fail("Matrix is not a vector: " + w + "*" + h);
}