nag_blast_dgemv (f16pac) Example Program Data
  3 2                  : m, n the dimensions of matrix A
  Nag_NoTrans          : trans
  1.5 1.0              : alpha, beta
  1 1                  : incx, incy
  1.0 2.0
  3.0 4.0
  5.0 6.0              : the end of matrix A
   -1.0
    2.0                : the end of vector x
    1.0
    2.0
    3.0                : the end of vector y