'Aux method.'

def _apply_raw(self, raw, include, exclude, n_pca_components, start, stop):

    if (not raw.preload):
        raise ValueError('Raw    data    must    be    preloaded    to    apply    ICA')
    if (exclude is None):
        exclude = list(set(self.exclude))
    else:
        exclude = list(set((self.exclude + exclude)))
    if (n_pca_components is not None):
        self.n_pca_components = n_pca_components
    (start, stop) = _check_start_stop(raw, start, stop)
    picks = pick_types(raw.info, meg=False, include=self.ch_names, exclude='bads', ref_meg=False)
    data = raw[picks, start:stop][0]
    (data, _) = self._pre_whiten(data, raw.info, picks)
    data = self._pick_sources(data, include, exclude)
    raw[picks, start:stop] = data
    return raw
