Re: TH2 draw zero bins

Hello Hermann,

I usually use either of following workarounds.

1)
gPad->SetFrameFillColor(1);

or
2)
h->SetMinimum(-1e-10);

If you save the canvas in PS/PDF/EPS, 1) will be better, because zero-value pixels are not drawn, and thus fils size will be smaller.

Regards,

--
OKUMURA, Akira oxon@{astro.isas.jaxa.jp,stanford.edu}
Institute of Space and Astronautical Science (ISAS/JAXA)
Now at KIPAC/SLAC/Stanford
Varian Physics #306, 382 Via Pueblo Mall, MC 4060
Stanford, CA 94305-4060
TEL 650-736-0971/FAX 650-724-5065
Skype : okumura.akira

On 2011/05/23, at 5:12, Hermann Fuchs wrote:



> Hello

> 

> I am displaying two dimensional data (energy deposited by a proton beam)

> with TH2 and the COLZ option.

> The data is in the range 0-100 (percent). It seems that bins which have

> the value zero are not drawn, e.g they appear white. 

> As I do have a color bar ranging from 0= black 100=yellow, having white

> for the value 0 is a no-go.

> 

> I have attached a picture to emphasize my problem.

> 

> How do I:

> 

> a) change the default color for zero values?

> b) enable the drawing of zero values in TH2?

> 

> I would really appreciate your help.

> 

> Yours,

> Hermann

> <CanvasEdepTwoDim.png>