getheader( param_name )

Display the value of a parameter associated to the currently JOINed
data-set. Any parameters can be used. Gifa already uses the
following parameters (as listed with the dataset command) :
Frequency, Freq1, Freq2, Freq3, Specw1, Specw2, Specw3, Offset1,
Offset2, Offset3, Type, Dim.
But parameters created with PUTHEADER can also be used.

see also : join newfilec putheader

NPK Documentation, version 0.995 - 2009-10-14