I have a simple AreaChart with several data points, some of
the y values are zero. Flex extends the y-axis to -0.25 by default
in this scenario; in effect, a double line is created--one at y=0
(lowest AreaChart data) and one at y=-0.25 (the y-axis minimum).
If I force the y-axis minimum to be zero in this case, only
one line renders; however, the line that renders is the axis
line--not the chart line. The chart line is rendered under the axis
and only the top half of the data point shows.
Google has figured it out with their Analytics product, so I
know it can be done. Their y=0 points and lines both render on top
of the x-axis. I'm just not sure how.
I tried messing around with the chart's BlendMode property,
in order to layer the chart on top of the axis line; however, I
couldn't get it to work. I don't know if that's the property to