>
> Hi John,
>
> > A while back, I asked about plotting multiple scalars to the same axis
> > and was told that I nust needed to call a SetScaleEnable(true). Well,
> > I've finally gotten back around to trying this, and I get the error:
> >
> > Single DisplayRealType DisplayYAxis occurs more than once:
> > ShadowType.testIndices
> >
> > What is going wrong?
>
> This message indicates that more than one RealType is mapped
> to Display.YAxis, and that the display logic is trying to
> apply both at once (e.g., data has MathType (a -> (b, c))
> and both b and c or both a and b are mapped to YAxis). If
> multiple RealTypes are mapped to YAxis, they cannot be in
> path from root to leaf in the MathType tree (the exact
> defintion is a bit complex, but this is the intuition).
>
> It is unlikely (but not impossible) that this is caused by the
> ScalarMap.setScaleEnable(true) call.
>
Right, that's exactly what I want to do. A while back, I asked about
mapping multiple data sets to the same axis, and got a response saying
that this was possible, if you use setScaleEnable:
<SNIPPET FROM OLD MESSAGE>
-------------------------------------------------------------------
> Is it possible to produce plots with more than one axis scale in the
> same direction? That is, if you have two or more RealTypes mapped to
> the same domain, is it possible to plot them in the same visualization
> space? If so, how?
>
Hi John,
As long as you have called GraphicsModeControl's setScaleEnable(true)
you should get an axis scale for every ScalarMap mapping a RealType to
an Axis. e.g.
display.getGraphicsModeControl().setScaleEnable(true);
display.addMap(new ScalarMap(a, Display.XAxis));
display.addMap(new ScalarMap(b, Display.XAxis));
should give you a scale for a and b along the x axis, unless I am
missing something.
--------------------------------------------------------------------
</END SNIPPET>
So, was this advice wrong? Is it not possible to plot two lines or two
surfaces (or whatever) in the same display? (For instance, a
"climatogram" plotting temperature and precipitation vs. time.) This
functionality is important to the educational visualization application
I am working on.
-john
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