code: def indices(self, names, axis=None):
          
          return Matrix.find_rowcol_indices(names,self.row_names,self.col_names,axis=axis)
docs: get the row and col indices of names. If axis is None, two ndarrays
                  are returned, corresponding the indices of names for each axis
  
          Parameters
          ----------
          names : iterable
              column and/or row names
          axis : (int) (optional)
              the axis to search.
  
          Returns
          -------
          numpy.ndarray : numpy.ndarray
              indices of names.