Check which points are in hexagons with count <= mincnt.
inout.hex(hbin, mincnt)an object of class hexbin.
Cutoff, id's for counts less than mincnt are returned
A vector with the row ids of points which fall in hexagons with
count less than or equal to mincnt
Check which points are in hexagons with count <= mincnt and
returns the row ids for those points. One can use the ids to plot low
ount hexagons as points instead.