Re: how to draw (x,y.z) point without binning x and y ?

Sorry but root reports:

Error: Function CreateGradientColorTable(Number,Stops,Red,Green,Blue,nb) is not defined in current scope FILE:test2.C LINE:22 Possible candidates are...
filename line:size busy function type and name *** Interpreter error recovered ***

why?

test2.C is just a macro of your code:

test2()
{

TCanvas *c = new TCanvas("c","Contours",600,0,600,600);

TF2 *f1 = new TF2("f2","0.1+(1-(x-2)*(x-2))*(1-(y-2)*(y-2))",1,3,1,3);

const Int_t Number = 5;

Double_t Red[Number] = { 0.00, 0.09, 0.18, 0.09, 0.00 };

Double_t Green[Number] = { 0.01, 0.02, 0.39, 0.68, 0.97 };

Double_t Blue[Number] = { 0.17, 0.39, 0.62, 0.79, 0.97 };

Double_t Stops[Number] = { 0.00, 0.34, 0.61, 0.84, 1.00 };

Int_t nb=50;

TColor::CreateGradientColorTable(Number,Stops,Red,Green,Blue,nb);

f2->SetContour(nb);

f2->Draw("surf1z");

}

My root version is 4.04/02g. Does it matter?

Cheers~

On 6/12/07, Olivier Couet <Olivier.Couet_at_cern.ch> wrote:
>
> Hope this will help:
>
>
> {
>
> TCanvas *c = new TCanvas("c","Contours",600,0,600,600);
>
> TF2 *f1 = new TF2("f2","0.1+(1-(x-2)*(x-2))*(1-(y-2)*(y-2))",1,3,1,3);
>
> Int_t Number = 5;
>
> Double_t Red[Number] = { 0.00, 0.09, 0.18, 0.09, 0.00 };
>
> Double_t Green[Number] = { 0.01, 0.02, 0.39, 0.68, 0.97 };
>
> Double_t Blue[Number] = { 0.17, 0.39, 0.62, 0.79, 0.97 };
>
> Double_t Stops[Number] = { 0.00, 0.34, 0.61, 0.84, 1.00 };
>
> Int_t nb=50;
>
> TColor::CreateGradientColorTable(Number,Stops,Red,Green,Blue,nb);
>
> f2->SetContour(nb);
>
> f2->Draw("surf1z");
>
> }
> ------------------------------
> *From:* X. Lu, Peking Univ. [mailto:hsienkuo.lu_at_gmail.com]
> *Sent:* Tuesday, June 12, 2007 12:39 PM
> *To:* Olivier Couet
> *Cc:* William Robbins; roottalk
> *Subject:* Re: [ROOT] how to draw (x,y.z) point without binning x and y ?
>
>
> Thanks ! It works.
>
> And one more question:
> I am using the option "Pcol". But how can I define
> the color myself?
>
> For example, the z value ranges from -2 to 2,
> then I would like to have the 4 regions
> -2 ~ -1, -1 ~ 0, 0 ~ 1, 1 ~ 2
> represented by 4 colors.
> How can I do this?
>
> Thanks again !
>
> Best Regards,
> Xianguo
>
>
> On 6/11/07, Olivier Couet <Olivier.Couet_at_cern.ch> wrote:
> >
> > TGraph2D with option P or P0 is the answer. See TGraph2D help.
> >
> > -----Original Message-----
> > From: owner-roottalk_at_pcroot.cern.ch
> > [mailto:owner-roottalk_at_pcroot.cern.ch] On Behalf Of William Robbins
> > Sent: Monday, June 11, 2007 5:23 PM
> > To: X. Lu, Peking Univ.
> > Cc: roottalk
> > Subject: Re: [ROOT] how to draw (x,y.z) point without binning x and y ?
> >
> > Hi-
> > I'm having a similar problem. I know that TMarkers can be used for a
> > plot of non-binned datapoints in a 2D-plane --maybe this somehow helps
> > Xianguo-- but how can we extend to three dimensions?
> > cheers
> > -Billy Robbins
> >
> > On Jun 11, 2007, at 9:05 AM, X. Lu, Peking Univ. wrote:
> >
> > > Dear rooters,
> > >
> > > I want to draw a graph for a group of 3-D data (x,y,z) in which the x
> > > and y values are not binned, i.e. the point in x-y plane is exactly a
> > > point. And moreover, the z are binned with 5 bins and in each bin
> > > the point is displayed by a specific color.
> > >
> > > How can I do that ?
> > >
> > >
> > > I can only think of TH2F and use SetBinContent. But the effect is not
> > > so satisfactory.
> > >
> > > Thanks in advance !
> > >
> > > Best Regards,
> > > Xianguo
> > >
> > >
> > > --
> > > Take flight into the sky, beyond the moon, beyond my mind.
> > >
> > > Xianguo LU
> > > Physics Department, Peking University
> > > Beijing, China
> > > Tel: 0086-10-62753888(o)
> >
> >
>
>
> --
> Take flight into the sky, beyond the moon, beyond my mind.
>
> Xianguo LU
> Physics Department, Peking University
> Beijing, China
> Tel: 0086-10-62753888(o)
>

-- 
Take flight into the sky, beyond the moon, beyond my mind.

Xianguo LU
Physics Department, Peking University
Beijing, China
Tel: 0086-10-62753888(o)