[Rivet] Ahistogram with two variables one on the y-axis and one on the x-axis

[Andy Buckley]

Hi Shayma,

You are calling a Scatter2D constructor that pre-populates with 50
"bin-like" data points, all with y-value = 0. In this case you need to
set your y-values on the existing points, rather than adding new ones.
Or create a scatter with no points to begin with, e.g.
bookScatter2D("charged_eta_Vs_Pt", false, "title","x-axis","y-axis");

This code will produce a *huge* scatter plot, though -- presumably one
point per event? I suspect you really want a Histo2D.

Andy


On 16 November 2017 at 14:57, Shayma Wahdan <shayma.wahdan at cern.ch> wrote:
> Hello,
>
> I am attaching my code.
>
> Many thanks
>
> Regards,
> Shayma
> ________________________________________
> From: David Grellscheid [david.grellscheid at durham.ac.uk]
> Sent: 16 November 2017 11:09
> To: Shayma Wahdan
> Cc: Rivet
> Subject: Re: [Rivet] Ahistogram with two variables one on the y-axis and one on the x-axis
>
> Hi,
>
> it's hard to tell what's going on without seeing your whole code. Can
> you please send a copy?
>
> Thanks,
>
>   David
>
>
>
>
> On 15/11/17 17:21, Shayma Wahdan wrote:
>> Prof.  Grellscheid,
>>
>> Many thanks for your reply, I am trying to use the scatter2D plot
>>
>> Exactly I put in my code
>>
>> Scatter2DPtr _h_charged_eta_Pt_top;
>>  _h_charged_eta_Pt_top = bookScatter2D("charged_eta_Vs_Pt", 50, 0, 150,"title","x-axis","y-axis");
>> _h_charged_eta_Pt_top->addPoint(FourMom.pT()/GeV,FourMom.eta(),0.0,0.0);
>>
>> and what the resulted plot are attached, I want to have the eta on the y-axis, the pt on the x-axis.
>> The axis titles in the attached plot are not correct
>> The plots look unreasonable,
>>
>> sorry for being annoying
>>
>> Best Regards,
>> Shayma' Wahdan
>> ________________________________________
>> From: David Grellscheid [david.grellscheid at durham.ac.uk]
>> Sent: 15 November 2017 12:28
>> To: Shayma Wahdan; rivet at projects.hepforge.org
>> Subject: Re: [Rivet] Ahistogram with two variables one on the y-axis and one on the x-axis
>>
>> Dear Shayma,
>>
>> If you want to see a scatter plot of points in the pT/rap plane, use
>> Scatter2D and addPoint(x,y,xerr,yerr). For a binned filling of the
>> pT/rap plane that e.g. could be turned into a lego plot, use Histo2D and
>> fill(x,y)
>>
>> See you,
>>
>>   David
>>
>> On 14/11/2017 20:32, Shayma Wahdan wrote:
>>> Dear Revit community,
>>>
>>> I am a new Rivet user, can I get help to know how can I generate a plot with revit with  forexample the pt on the y-axis and the rapidity on the x-axis, with bookHisto1D I always get the bin sum on the y-axis
>>>
>>> also Histo2D, and Profile1D !!
>>>
>>> Best Regards,
>>> Shayma
>>>
>>>
>>>
>>> _______________________________________________
>>> Rivet mailing list
>>> Rivet at projects.hepforge.org
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>>>
>
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-- 
Dr Andy Buckley, Lecturer / Royal Society University Research Fellow
Particle Physics Expt Group, University of Glasgow