Re: COLZ option

Hi Otto,

Thanks very much, that really explains the thing and solves my problem.

Regards
Monika

Otto Schaile wrote:

> Hi Monika,
> seems to me you have a 1000x1000 2 dim hist, but you fill only
> 50 out of 1000 channels, all others are empty. In this case you get
> this faint picture.
> Change your binning to:
> TH2F *h_2d = new TH2F("h_2d","", 50, 0, 50, 50, 0, 50);
>
> Cheers
> Otto
>
> Monika Sharma wrote:
>
>>
>> Hi,
>>
>> Thanks for explaining it.
>> I have put the gif file in the following area :
>> http://www.star.bnl.gov/~monika/neg_pos.gif
>>
>> Is there anyway I can improve it. Colours are quite faded.
>>
>> Thanks for your help.
>>
>> Regards
>> Monika
>>
>> Olivier Couet wrote:
>>
>>> Hi,
>>>
>>> I think you misunderstood what option COLZ is doing:
>>>
>>> // For each cell (i,j) a box is drawn with a color proportional
>>> // to the cell content.
>>> // The color table used is defined in the current style (gStyle).
>>> // The color palette in TStyle can be modified via
>>> TStyle::SeTPaletteAxis.
>>>
>>> So, no markers are involved in the COLZ drawing. So the markers
>>> attributes changes have no effect on the COLZ layout.
>>>
>>> Cheers, O.Couet
>>>
>>>
>>> On Tue, 27 Jun 2006, Monika Sharma wrote:
>>>
>>>
>>>
>>>> Hi everyone,
>>>>
>>>> I am trying to draw a 2D scatter plot with "colz" option.
>>>> But I am not able to change marker style/marker size.
>>>>
>>>> By default "colz" option takes marker style (1) which is too
>>>> small and different colours are quite faded. How can I change the
>>>> style and size? Following what I am trying to do :
>>>>
>>>> TH2F *h_2d = new TH2F("h_2d","", 1000, 0, 50, 1000, 0, 50);
>>>>
>>>> TStyle *myStyle = new TStyle("myStyle","my style");
>>>> myStyle->SetPalette(1,0);
>>>> myStyle->cd();
>>>> gStyle->SetOptStat(0);
>>>> {
>>>> .
>>>> .
>>>> .
>>>> .
>>>> h_2d->Fill(,)
>>>> .
>>>> .
>>>> .
>>>> }
>>>>
>>>>
>>>>
>>>> h_2d->SetMarkerStyle(29);
>>>> h_2d->SetMarkerSize(1.2);
>>>> h_2d->Draw("colz");
>>>>
>>>>
>>>> Thanks for any help.
>>>>
>>>> Regards
>>>> Monika
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>
>
Received on Wed Jun 28 2006 - 09:43:46 MEST