code: def mtxmg(m1, m2, ncol1, nr1r2, ncol2):
      
      m1 = stypes.toDoubleMatrix(m1)
      m2 = stypes.toDoubleMatrix(m2)
      mout = stypes.emptyDoubleMatrix(x=ncol2, y=ncol1)
      ncol1 = ctypes.c_int(ncol1)
      nr1r2 = ctypes.c_int(nr1r2)
      ncol2 = ctypes.c_int(ncol2)
      libspice.mtxmg_c(m1, m2, ncol1, nr1r2, ncol2, mout)
      return stypes.cMatrixToNumpy(mout)
docs: Multiply the transpose of a matrix with
      another matrix, both of arbitrary size.
  
      http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/mtxmg_c.html
  
      :param m1: nr1r2 X ncol1 double precision matrix.
      :type m1: NxM-Element Array of floats
      :param m2: nr1r2 X ncol2 double precision matrix.
      :type m2: NxM-Element Array of floats
      :param ncol1: Column dimension of m1 and row dimension of mout.
      :type ncol1: int
      :param nr1r2: Row dimension of m1 and m2.
      :type nr1r2: int
      :param ncol2: Column dimension of m2.
      :type ncol2: int
      :return: Transpose of m1 times m2.
      :rtype: NxM-Element Array of floats