Re: Problem drawing 2D histograms with all entries at zero with colz option

Hi Olivier,

Thanks a lot for you help!!!

I will wait for you news

Cheers,

Melinda

On Wed, Jul 6, 2011 at 2:21 PM, Olivier Couet <Olivier.Couet_at_cern.ch> wrote:

> Hi Melinda.
>
> Ok fine. I just wanted to double check with you that all bins filled with
> 1 is ok.
> I have the fix. I will post it soon in the SVN trunk.
> I'll let you know.
>
> Olivier
>
> From: Melinda Siciliano <mellybinda_at_gmail.com>
> Date: Wed, 6 Jul 2011 14:18:36 +0200
>
> To: Olivier Couet <Olivier.Couet_at_cern.ch>
> Cc: "roottalk (Mailing list discussing all aspects of the ROOT system.)" <
> roottalk_at_cern.ch>, Annalisa Mastroserio <Annalisa.Mastroserio_at_cern.ch>,
> Domenico Elia <domenico.elia_at_cern.ch>, Chiara Bianchin <
> Chiara.Bianchin_at_cern.ch>, "masera_at_to.infn.it" <masera_at_to.infn.it>,
> Stefania Beole <beole_at_to.infn.it>, Piergiorgio Cerello <cerello_at_to.infn.it
> >
>
> Subject: Re: [ROOT] Problem drawing 2D histograms with all entries at zero
> with colz option
>
> Hi Olivier,
>
> It's the same for me. With one it works also for me, but not with zero....
> And, as far as I know, the histogram can have also the case in which all the
> bins have zero as entry value. Annalisa, can you say something?
>
> Cheers,
>
> Melinda
>
> On Wed, Jul 6, 2011 at 2:00 PM, Olivier Couet <Olivier.Couet_at_cern.ch>wrote:
>
>> Hi Melinda,
>>
>> In your macro, if instead of filling all the bins with 0 I fill them
>> with 1, I get a correct result.
>> Do you agree ?
>>
>> Cheers,
>> Olivier
>>
>> From: Melinda Siciliano <mellybinda_at_gmail.com>
>> Date: Wed, 6 Jul 2011 13:18:19 +0200
>> To: Olivier Couet <Olivier.Couet_at_cern.ch>, "roottalk (Mailing list
>> discussing all aspects of the ROOT system.)" <roottalk_at_cern.ch>
>> Cc: Annalisa Mastroserio <Annalisa.Mastroserio_at_cern.ch>, Domenico Elia <
>> Domenico.Elia_at_cern.ch>, Chiara Bianchin <Chiara.Bianchin_at_cern.ch>,
>> Massimo Masera <masera_at_to.infn.it>, Stefania Beole' <beole_at_to.infn.it>,
>> Piergiorgio Cerello <cerello_at_to.infn.it>
>> Subject: Re: [ROOT] Problem drawing 2D histograms with all entries at
>> zero with colz option
>>
>>
>>
>> On Wed, Jul 6, 2011 at 1:09 PM, Melinda Siciliano <mellybinda_at_gmail.com>wrote:
>>
>>> Hi Olivier,
>>>
>>> In the example I forced a little bit the effect. But, I think that the
>>> problem is general: if I have a macro in which I want to analyze some data
>>> and I have an histogram that I fill and it could happen that this histo can
>>> be filled with zero. But at this point, I expect that the histogram will be
>>> plot "empty" with the entries with zero value and I see that the result of
>>> the macro is this histogram have all the entries to zero.I think it is a
>>> general case that I expect a flat distribution with a value like zero
>>> instead of a number different to zero. With the previous versions, there
>>> wasn't this problem, but it appears with the 5-28-00*. I think that Annalisa
>>> can give us some more details about the histogram and how it is filled.
>>>
>>> Cheers,
>>>
>>> Melinda
>>>
>>>
>>>
>>> On Wed, Jul 6, 2011 at 12:05 PM, Olivier Couet <Olivier.Couet_at_cern.ch>wrote:
>>>
>>>> Hi,
>>>>
>>>> You Paint using COLZ. So an axis will be painted along the palette.
>>>> But the histogram is empty therefore this axis ends and starts at 0.
>>>> That's what the message says.
>>>> Nothing has changed.
>>>> You used the option Z in the past also ? Your histograms were also empty
>>>> ?
>>>>
>>>> Cheers
>>>>
>>>> From: Melinda Siciliano <mellybinda_at_gmail.com>
>>>> Date: Wed, 6 Jul 2011 11:49:21 +0200
>>>> To: "roottalk (Mailing list discussing all aspects of the ROOT
>>>> system.)" <roottalk_at_cern.ch>
>>>> Cc: Annalisa Mastroserio <Annalisa.Mastroserio_at_cern.ch>, Chiara
>>>> Bianchin <Chiara.Bianchin_at_cern.ch>, Domenico Elia <
>>>> Domenico.Elia_at_cern.ch>, Massimo Masera <masera_at_to.infn.it>
>>>> Subject: [ROOT] Problem drawing 2D histograms with all entries at zero
>>>> with colz option
>>>>
>>>> Dear ROOTers,
>>>>
>>>> I'm using the ROOT v5-28-00e. I have a situation similar to the one in
>>>> the attached file. I have a 2D histogram that is filled with the number
>>>> returned from another object. If the object is OK, this object returns 0,
>>>> otherwise, in case of error, it will return a number different from zero,
>>>> according with an error table. In principle. So, if my histogram is ok , all
>>>> my entries will be set to zero.
>>>>
>>>> With the past releases I didn't get any error, but now I receive a
>>>> floating point error and the message
>>>>
>>>> Error in <TGaxis::PaintAxis>: wmin (0.000000) == wmax (0.000000).
>>>>
>>>> Has something changed between the previous release (v5-27-06)? What
>>>> have I to modify?
>>>>
>>>> Thanks for your help,
>>>>
>>>> Cheers,
>>>>
>>>> Melinda
>>>>
>>>>
>>>>
>>>
>>
>
Received on Wed Jul 06 2011 - 14:31:55 CEST