get a ggplot legend object
getLegend(a.gplot)
a legend grob
Other plot help:
AD2BP_trans()
,
BP2AD_trans()
,
axisLabel()
,
bin2d()
,
geoChronRPlotTheme()
,
getPlotRanges()
,
kde2d()
,
meltDistributionTable()
,
modeSelektor()
,
periodAnnotate()
,
quantile2d()
,
reverselog10_trans()