Re: [ROOT] Display irrregular Data

From: Rene Brun (Rene.Brun@cern.ch)
Date: Tue Jun 11 2002 - 23:49:11 MEST


Florian,

In my previous email to you, I indicated what is currently existing in
Root for displaying x(i),y(i),value(i)
The new Root class TPainter3DAlgorithms recently added in the system
and replacing the previous class TLego has all the functionality
to do what you want, but it still requires a user interface
on top of it.

I take this opportunity to announce that Olivier Couet is now joining
the ROOT team. Olivier had been working with us on the PAW system for many
years and he will take care of the 2-d and 3-d graphics in ROOT.
Olivier's first task has been to implement TPainter3DAlgorithms.
He could implement a 3-d graph class using  TPainter3DAlgorithms for
painting.

Rene Brun

On Tue, 11 Jun 2002, Florian Schopper wrote:

> 
> Dear Mr. Brun,
> 
> Thanks a lot for your example.
> It seems that there are only limited possibilities for the display of the
> Ntupels or TH3Fs, though. Is there another way to show datapoints ?
> The nicest thing would be a colour coded display or a surface plot. 
> 
> I use a TH2 right now, but I have to give it a binning and then I loose
> the exact position information and I end up with lots of empty bins which
> make surface plots look really ugly.Is there Anything more like a 3D
> graph? Or is there a way to suppress bins in a histogram so that a surface
> plot wouldnt use these bins?
> 
>    cheers and thanks 
> 
>           Florian Schopper
> 
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