code: def mtxvg(m1, v2, ncol1, nr1r2):
      
      m1 = stypes.toDoubleMatrix(m1)
      v2 = stypes.toDoubleVector(v2)
      ncol1 = ctypes.c_int(ncol1)
      nr1r2 = ctypes.c_int(nr1r2)
      vout = stypes.emptyDoubleVector(ncol1.value)
      libspice.mtxvg_c(m1, v2, ncol1, nr1r2, vout)
      return stypes.cVectorToPython(vout)
docs: Multiply the transpose of a matrix and
      a vector of arbitrary size.
  
      http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/mtxvg_c.html
  
      :param m1: Left-hand matrix to be multiplied.
      :type m1: NxM-Element Array of floats
      :param v2: Right-hand vector to be multiplied.
      :type v2: Array of floats
      :param ncol1: Column dimension of m1 and length of vout.
      :type ncol1: int
      :param nr1r2: Row dimension of m1 and length of v2.
      :type nr1r2: int
      :return: Product vector m1 transpose * v2.
      :rtype: Array of floats