hi dear experts,

i am trying to draw latex texts on a graph with the y axis log scale.

the text always appears at the top of the graph and when I try to change its location by mouse it goes at the horizontal axis and stuck there.

i tested different location values but the same thing happened.

TFile* f = new TFile(“result.root”);

TCanvas* c1 = new TCanvas(“c1”, “”);TH2D* edepPrimaryH = (TH2D*)f->Get(“2d_PrimaryedepKernels”);

TH2D* edepFirstH = (TH2D*)f->Get(“2D_FirstedepKernels”);

TH2D* edepSecondH = (TH2D*)f->Get(“2D_SecondedepKernels”);

TH2D* edepMultipleH = (TH2D*)f->Get(“2D_MultipleedepKernels”);

TH2D* edepeBremAnnihilH = (TH2D*)f->Get(“2D_eBremAnnihiledepKernels”);

TH2D* massH = (TH2D*)f->Get(“2d_Mass”);double ttreedose;

double ttreepol;

double ttreer;

TTree* _angle1 = new TTree(“Ntuple1”, “Edep”);

_angle1->Branch(“d”, &ttreedose, “d/D”);

_angle1->Branch(“p”, &ttreepol, “p/D”);

_angle1->Branch(“r”, &ttreer, “r/D”);double no_photon=1e6-3170;

double to_gray=1.6091e-13;to_centigray)/(incident_e*no_photon);

double incident_e=1.25;

double to_centigray=1e2;

double scale=(to_grayfor(Int_t iphi=0;iphi<48;iphi++)

for(Int_t ir=0;ir<25;ir++)

{

double edep=edepPrimaryH->GetBinContent(iphi,ir)

+edepFirstH->GetBinContent(iphi,ir)

+edepSecondH->GetBinContent(iphi,ir)

+edepMultipleH->GetBinContent(iphi,ir)

+edepeBremAnnihilH->GetBinContent(iphi,ir);

double dose = edep/massH->GetBinContent(iphi,ir);

isoprimary->SetBinContent(iphi,0.5*(2irir+1),dose);

ttreer=0.5*(2irir+1)/10;

ttreepol=iphi;

ttreedose=dosescale;r

_angle1->Fill();

}

angle1->SetLineColor(kBlack);{}}{Kg.Photon}}");

angle1->SetLineWidth(2);{} #[]{#frac{MeV.cm^{2}

TMultiGraph *mg = new TMultiGraph(“mg”, ";r#[]{cm};Dose#timesr^{2}

_angle1->Draw("dr:r",“p==0 && r<20”,"");)gPad->GetPrimitive(“Graph”)->Clone());

mg->Add((TGraph

_angle1->Draw(“drr:r”,“p==6&&r<20”,"");

mg->Add((TGraph*)gPad->GetPrimitive(“Graph”)->Clone());

_angle1->Draw(“drr:r”,“p==12&&r<20”,"");

mg->Add((TGraph*)gPad->GetPrimitive(“Graph”)->Clone());

mg->Draw(“AL”);gPad->SetLogy(1);;

TLatex latex;

latex.SetTextSize(0.018);

latex.SetTextAlign(13); //align at top

latex.DrawLatex(5,5,“0^{#circ} - 3.75^{#circ}”);

latex.DrawLatex(5,5,“22.5^{#circ} - 26.25^{#circ}”);

latex.DrawLatex(5,5,“45^{#circ} - 48.75^{#circ}”);

c1->cd();

c1->Update();

how can i draw them?

many thanks,