def _plot_update_evoked(params, bools):
    """ update the plot evoked lines
    """
    picks, evoked = [params[k] for k in ('picks', 'evoked')]
    times = evoked.times % 1e3
    projs = [proj for ii, proj in enumerate(params['projs'])
             if ii in np.where(bools)[0]]
    params['proj_bools'] = bools
    new_evoked = evoked.copy()
    new_evoked.info['projs'] = []
    new_evoked.add_proj(projs)
    new_evoked.apply_proj()
    for ax, t in zip(params['axes'], params['ch_types_used']):
        this_scaling = params['scalings'][t]
        idx = [picks[i] for i in range(len(picks)) if params['types'][i] == t]
        D = this_scaling * new_evoked.data[idx, :]
        if params['plot_type'] == 'butterfly':
            for line, di in zip(ax.lines, D):
                line.set_data(times, di)
        else:
            ax.images[0].set_data(D)
    params['fig'].canvas.draw()
dataset/ETHPy150Open mne-tools/mne-python/mne/viz/evoked.py/_plot_update_evoked/operator `*` -> `%`