Hi Bill and all,
Bill Hibbard wrote:
Hi Frank,
Can anyone explain the threshold effect of the negative value for the pBars
- shouldn't any negative value cause the desired lines from below y=0 up to
the data point?
The key point is to get the right relation between the
-0.1 in pBars.coordinates, and the values passed to the
setRange() method for yMap and pBarScaleMap. For example,
I think the following work:
yMap.setRange(0.0, 40.0);
pBarScaleMap.setRange(0.0, 2.0);
I suspect the general relation is something like:
pBars.coordinates = new float[] {0.0f, 0.0f, 0.0f, 0.0f, x, 0.0f};
yMap.setRange(0.0, y);
pBarScaleMap.setRange(0.0, x * y / 2.0);
But I could be wrong. Please experiment (and Ugo please
correct me if I'm wrong).
my approach would be: try it out!
Though I did use the bars some time ago, today I think I'd use
Linear2DSets for that.
Perhaps we ought to have a (DisplayRealType)Display.ErrorBar? If there
exists error propagation in VisAD, there there could/should exist some
handsome way of visualisaing that. I'm really thinking of standards
error bars, here the ascii version:
___ ___
| |
| |
x or even with sx and sy: |--x--|
| |
_|_ _|_
Cheers,
Ugo
