how can I check if an xyplot overlay with a given ID number is added/exists?
This is what I am trying to do:
if( hide_overlay ) {
check if overlay ID=1 exists
if( overlay ID=1 exists )
fl_remove_overlay()
}
since overlays are not separate objects it seems I cannot use the
object->active field...
Thanks,
Dimitris(panas@rain.org)
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