Perform extended 'Pagoda2' processing. Generate organism specific GO environment and calculate pathway overdispersion.
extendedP2proc(p2, organism = "hs")
list of a 'Pagoda2' object and go.env
the 'Pagoda2' object
character Organisms hs (Homo Sapiens), mm (M. Musculus, mouse) or dr (D. Rerio, zebrafish) (default='hs')