Creates a virtual track and runs gextract

gvextract(tracks, intervals, colnames = NULL, iterator = NULL,
  band = NULL, file = NULL, intervals.set.out = NULL, func = NULL,
  params = NULL)

Arguments

tracks
tracks
intervals
intervals
colnames
colnames
iterator
iterator
band
band
file
file
intervals.set.out
intervals.set.out
func
func
params
params