Hi Rene,
I have a problem with Form():
now I have 30 slice with name slice_1,...,slice_30;
How Can I take this slice to fit it ?
....
Tf1 *myfunc = new TF1("myfunc","gaus");
for(Int_t i=1; 1<31; i++){
Slice->ProjectionY(Form("Slice_%d",i),i,i);
Form("Slice_%d",i)->Fit("myfunc"); <-----At this line I get an error
...
}
When I run the script I have:
root [3] .L histo_slice_ris_ene.C
root [4] slices()
Error: non class,struct,union object Form("sct_%d",i) used with . or ->
FILE:histo_slice_ris_ene.C LINE:13
*** Interpreter error recovered ***
Thanks
Francesco.
Il lun, 2004-04-26 alle 19:49, Rene Brun ha scritto:
> Francesco,
>
> Instead of:
> Slice->ProjectionY("Slice_i",i,i);
> do
> Slice->ProjectionY(Form("Slice_%d",i),i,i);
>
> Rene Brun
>
> On Mon, 26 Apr 2004, Perfetto
> Francesco wrote:
>
> > Hi All,
> >
> > I have the following problem:
> > I have to do many slice of a bidimensional histogram, and I would like to
> > call it "Slice_1", "Slice_2", ..., etc. etc.
> >
> > I make this in my script:
> >
> > TFile *f1 = new TFile("MC.root");
> > TFile *f2 = new TFile("proiezioni_MC_30x70.root","RECREATE");
> > TTree *t = (TTree*)f1->Get("res");
> > TH2D *Slice = new TH2D("Slice","Slice",30,0,1,70,-1,2);
> >
> > ...
> >
> > for(Int_t i=1;i<31;i++)
> > Slice->ProjectionY("Slice_i",i,i);
> >
> > ...
> >
> > f2->Write();
> >
> > But I haven't that I want.
> > Infact all Slice are named Slice_i.
> > Can anyone help me?
> >
> > Thanks
> > Francesco.
> >
> > I use RedHat 9.0 with root 4.00/03
> >
>
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