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Name

gfptopo - generate a global field power plot and a series of topo maps

for ERP data

Synopsis

gfptopo avgfile bin [-cap cap] [-start latency [-end latency]] [-csd] [-scale scale]

Description

gfptopo generates a global field power plot and a series of topo(1) maps at 4ms intervals (one topo map per recording sample) for the ERP data in bin bin of avgfile. It assumes: 


  - the data in the average file were collected using the standard
    26chan cap (unless otherwise specified by the -cap option)
  - 250 Hz sampling rate
  - 100 ms presample
  - 1024 ms epoch length

If -cap is specified, that value is used as the cap argument to topo(1) (see the topo man page) instead of 26chan. If no latencies are given, topo maps are generated for the entire epoch (five pages). If a starting latency is given, one page of topo maps is generated starting at that latency. If both starting and ending latencies are given, topo maps are generated between the given latencies (however many pages that is). If -csd is specified, current source density is plotted instead of potential. If -scale is specified (i.e. -scale 5.0), that value is used for the scale of the topo maps.

See Also

gfp(1) , topo(1)

Author

Paul Krewski

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