mne-tools/mne-python — pull request #1182 by rkmaddox (2014-03-14 22:15:26+00:00)
Title: ENH Added on_missing to Epoch init

Added an option to allow for events that do not occur. This will allow rare events that may or may not happen, such as "a certain condition was presented but no response button was pressed." This prevents errors in the case of rare events that do not happen, and allows for a warning or ignoring them altogether.