def METHOD_NAME(self):
    if self.mt_dict is None:
        print "Cannot save GMT, please read a ModEM data and/or response file first"
    self.data_array=np.zeros((len(self.mt_dict), 6))
    for i in range(len(self.mt_dict)):
        for ii, att in enumerate(['lon', 'lat', self.colorby, 'azimuth', 'phimin', 'phimax', 'skew']):
            self.data_array[i, ii]=getattr(self.mt_dict[i], att)