Re: plot("same")

Sorry it should be:
f->SetRange(-25,-25,25,25);

> I believe what you want is:
> f->SetRange(-25,25,-25,25);
> Hope that helps, - Nevzat
>
>> Eduard,
>>
>> SetMinimum and SetMaximum help with the z-range. But the x and y ranges
>> are plotted wrong, too.
>> (I could define the function over the same range as the histogram, but
>> it just seems like this should work even when the ranges are different.)
>>
>> Holger
>>
>>
>> On 02/08/2011 03:52 PM, Eduard Avetisyan wrote:
>>> Hello Holger,
>>>
>>> See below:
>>>
>>> On Tue, 8 Feb 2011, Holger Meyer wrote:
>>>
>>>
>>>> Hello,
>>>>
>>>> how can I plot a histogram and a function in the same canvas so that
>>>> both use the same scale?
>>>> This macro (problem.C) shows the problem:
>>>>
>>>>
>>>> Double_t Gaus2D(Double_t *x, Double_t *par)
>>>> {
>>>> if(par[2] > 0 && par[4] > 0)
>>>> {
>>>> double rx=(x[0]-par[1])/par[2];
>>>> double ry=(x[1]-par[3])/par[4];
>>>> return par[0]*TMath::Exp(-(rx*rx+ry*ry)/2.);
>>>> }
>>>> else
>>>> return 0.;
>>>> }
>>>>
>>>> problem() {
>>>> TCanvas* cnv = new TCanvas("cnv","Canvas",800,400);
>>>> cnv->Divide(2);
>>>> cnv->cd(1);
>>>>
>>>> //draw a histogram
>>>> TH2F* h2 = new TH2F("h2","Hist2D",50,-25.,25., 50,-25.,25.);
>>>> h2->SetBinContent(1275,10.);
>>>> h2->Draw("lego");
>>>>
>>>> //draw a function in another pad so it is easy to compare the range
>>>> cnv->cd(2);
>>>> TF2* f = new TF2("g2d",Gaus2D,-10.,10.,-10.,10.,5);
>>>> f->SetParameter(0,10.);
>>>> f->SetParameter(1,2.);
>>>> f->SetParameter(2,3.);
>>>> f->SetParameter(3,0.);
>>>> f->SetParameter(4,3.);
>>>> f->SetLineColor(616);
>>>> f->Draw("surf");
>>>>
>>>> //plot the same function superimposed on the histogram
>>>> //Why does it not respect the axis range given in this pad by the
>>>> histogram?
>>>> cnv->cd(1);
>>>>
>>> f->SetMaximum(h2->GetMaximum());
>>> f->SetMinimum(h2->GetMinimum());
>>>
>>>> f->Draw("surf,same");
>>>> }
>>>>
>>>>
>>>>
>>>> Thanks,
>>>> Holger
>>>>
>>>>
>>
>>
>
>
> - Nevzat Guler
> (757) 553-8318
>
>

• Nevzat Guler (757) 553-8318