Fix to circle and example. [circle full]

circle.yml

@@ -87,6 +87,10 @@ dependencies:
             if [[ $(cat $FNAME | grep -x ".*brainstorm.*bst_phantom_elekta.*" | wc -l) -gt 0 ]]; then
               python -c "import mne; print(mne.datasets.brainstorm.bst_phantom_elekta.data_path(update_path=True))" --accept-brainstorm-license;
             fi;
+            if [[ $(cat $FNAME | grep -x ".*datasets.*megsim.*" | wc -l) -gt 0 ]]; then
+              python -c "import mne; print(mne.datasets.megsim.load_data(condition='visual', data_format='single-trial', data_type='simulation', update_path=True))";
+              python -c "import mne; print(mne.datasets.megsim.load_data(condition='visual', data_format='raw', data_type='experimental', update_path=True))";
+            fi;
           fi;
         done;
         echo PATTERN="$PATTERN";

examples/datasets/plot_megsim_data_single_trial.py

@@ -17,6 +17,7 @@
 
 from mne import read_evokeds
 from mne.datasets.megsim import load_data
+from mne import combine_evoked
 
 print(__doc__)
 
@@ -30,7 +31,7 @@
 epochs_fnames = [f for f in epochs_fnames if 'sim6_trial_' in f][:10]
 
 evokeds = [read_evokeds(f)[0] for f in epochs_fnames]
-mean_evoked = sum(evokeds[1:], evokeds[0])
+mean_evoked = combine_evoked(evokeds, weights='nave')
 
 # Visualize the average
 mean_evoked.plot()