RE: a short question

From: Olivier Couet <>
Date: Thu, 31 Aug 2006 13:16:02 +0200

Yes, I agree .. color palette for TRI1 should behave like for SURF1 (note that TRI1 was not used a lot up to now)

From: claudio [] Sent: Thursday, August 31, 2006 1:12 PM
To: Olivier Couet
Subject: Re: [ROOT] a short question

mmmmh, you're right! I've read the manual and I should have notice it... sorry and very thanks  

Just a fashion note:
with the SURF1 option, the colours are bounded with the scale in a way that e.g. the red occupy always the same fraction of the axis even a use a logarithmic scale. With the TRI1 option, the colour scale is bounded with the values, so the red is associated always with the same value-range. If I change scale, the coulor associated with the lower range occupy the most of the space.
These are surely two different philosophy, of which I prefer the first because the plot is more "readable". There's a way to switch from one to the other?  

Cheers, Claudio  

PS: ROOT version 5.11/02      

On 8/31/06, Olivier Couet < > wrote:


        With the option SURF1 it is difficult to define the concept of "wall" as

        you mean here. With SURF1 an histogram is drawn and the empty bins are

        normal bins and therefore are part of the surface. But TGraph2D provides

        specific options to draw what you what. Try TRI1 instead of SURF1.                  Cheers, Olivier Couet         

        On Wed, 30 Aug 2006, claudio wrote:         

> Hi roottalk;
> I've a 3Dplot:
> TGraph2D* foo = new TGraph2D("foo.dat");
> foo->Draw("surf1");
> gPad->SetLogz(1);
> I'm interested only at the "floating valley"; I don't want the
two wall at

> the sides.
> I understand why they appear, but I don't know how make a plot

> them...
> Thanks to anyone can help me
> Claudio

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7670300          Received on Thu Aug 31 2006 - 13:16:14 MEST

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