[Mne_analysis] How to save figures in a loop without displaying them?

[Maria Hakonen]

Hi all,

I would like to remove eog artifacts from several files in a loop using ica
and save some plots of the ica results without displaying them while the
loop is running. I have tried this as follows:

subjects = ['av','li','kk','mh','ml']
for s in range(0,5):
        sessions = ['_s1','_s2','_s3']
        for x in range(0, 3):
                ...

                fig = ica.plot_scores(scores, exclude=eog_inds)
                file_end= 'scores.png'
                filename = subjects[s]+sessions[x]+file_end
                plt.savefig(filename)
                plt.close(fig)

                fig=ica.plot_sources(epochs_bp,eog_inds)
                file_end = 'sources.png'
                filename = subjects[s]+sessions[x]+file_end
                plt.savefig(filename)
                plt.close(fig)

                fig=ica.plot_components(eog_inds, colorbar=True)
                file_end = 'components.png'
                filename = subjects[s]+sessions[x]+file_end
                plt.savefig(filename)
                plt.close(fig)
                ica.exclude += eog_inds[:1]
                 ...

However, I get errors pasted below. They seem to come from plt.close(fig).
Could somebody please let me know what I am doing wrong. Thanks already in
advance!

RuntimeError                              Traceback (most recent call last)
/usr/lib/pymodules/python2.7/matplotlib/backends/backend_qt4.pyc in
<lambda>()
    149         #    self.close_event)

    150         QtCore.QObject.connect(self, QtCore.SIGNAL('destroyed()'),
--> 151                                lambda: self.close_event())
    152
    153     def __timerEvent(self, event):

/usr/lib/pymodules/python2.7/matplotlib/backend_bases.pyc in
close_event(self, guiEvent)
   1562         try:
   1563             event = CloseEvent(s, self, guiEvent=guiEvent)
-> 1564             self.callbacks.process(s, event)
   1565         except TypeError:
   1566             pass

RuntimeError: underlying C/C++ object has been deleted

Best Regards,
Maria
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