Difference Topomaps

Hi there,

I’m trying to work out a way to create a difference topomap to visualize the difference between two conditions. I.e., I want to plot the topomap of condition 1 - condition 2 for an average of 150-250ms, 300-500ms and 600-800ms. I thought the easiest way to do this would be via getting the data from each evoked object, subtracting them and creating a new evoked object with EvokedArray. Unfortuantely, I haven’t managed to find a way to do this! Any help is appreciated.



you can simply use mne.combine_evoked() to create a difference evoked, and then plot its topomap.

Best wishes,

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