# demonstrate how two quantities on the same cadence can be bundled
# to make multi-line empheris ticks (TCAs).

# allow the dataset to be browsed for any time.  This may become
# unnecessary in the future.
tr= getParam( 'timerange', '2012-06-12', 'timerange to load' )

# load rank 1 dist.
dist= getDataSet('vap+cdaweb:ds=WI_K0_MFI&id=DIST&timerange=%s' % tr )

# load rank 2 bundle.
pgsm= getDataSet('vap+cdaweb:ds=WI_K0_MFI&id=PGSM&timerange=%s' % tr )

from org.virbo.dataset.DataSetOps import unbundle

if ( dist==None ):
   result= None
else:
   # bundle the four quantities together
   result= bundle( dist, unbundle(pgsm,0) )
   result= bundle( result, unbundle(pgsm,1) )
   result= bundle( result, unbundle(pgsm,2) )
   result.putProperty( QDataSet.DEPEND_0, dist.property( QDataSet.DEPEND_0 ) )

# this has issues (20120615):
#   1. dist doesn't get a label
#   2. I plot the bundle above, and x GSM is "no valid data".  (This may be because ticks are not checking valid range)