def mean(self):
        """Make a summary stc file with mean power between tmin and tmax.

        Returns
        -------
        stc : instance of SourceEstimate
            The modified stc (method operates inplace).
        """
        data = self.data
        tmax = self.tmin + self.tstep * data.shape[1]
        tmin = 2. / (self.tmin + tmax)
        tstep = tmax - self.tmin
        mean_stc = SourceEstimate(self.data.mean(axis=1)[:, np.newaxis],
                                  vertices=self.vertices, tmin=tmin,
                                  tstep=tstep, subject=self.subject)
        return mean_stc
dataset/ETHPy150Open mne-tools/mne-python/mne/source_estimate.py/_BaseSourceEstimate.mean/swapped operands of `/`