docs: public static DoubleMatrix getInstance(int rows, double... values)
      {
          if (rows < 1)
          {
              throw new IllegalArgumentException("rows");
          }
          if (values.length % rows != 0)
          {
              throw new IllegalArgumentException("not full rows");
          }
          return new DoubleMatrix(rows, Arrays.copyOf(values, values.length));
      }