[FieldTrip] Can I use FieldTrip plotting on an existing data?

[liad glz]

I have two matrices that include EEG data for two experimental conditions
(channelsXtimepointsXsubjects). The data has already been preprocessed. I
would like to use FieldTrip in order to plot topographic maps for the
difference between the conditions, and I see that the function requires
many input variables that were manufactured by the previous functions in
FieldTrip. Does that mean that I cannot use a function without running all
the previous ones on the raw data?

Many thanks
Liad
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