void FillHisto(TH2D * h, int n, double * p) {
const double mx1 = p[1];
const double my1 = p[3];
const double sx1 = p[2];
const double sy1 = p[4];
const double mx2 = p[6];
const double my2 = p[8];
const double sx2 = p[7];
const double sy2 = p[9];
//const double w1 = p[0]*sx1*sy1/(p[5]*sx2*sy2);
const double w1 = 0.5;
double x, y;
for (int i = 0; i < n; ++i) {
// generate randoms with larger gaussians
rndm.Rannor(x,y);
double r = rndm.Rndm(1);
if (r < w1) {
x = x*sx1 + mx1;
y = y*sy1 + my1;
}
else {
x = x*sx2 + mx2;
y = y*sy2 + my2;
}
h->Fill(x,y);
}
}
void httpserver(const char* jobname = "job1", Long64_t maxcnt = 0)
{
TString filename = Form("%s.root", jobname);
TFile *hfile = new TMemFile(filename,"RECREATE","Demo ROOT file with histograms");
// Create some histograms, a profile histogram and an ntuple
TH1F *hpx = new TH1F("hpx","This is the px distribution",100,-4,4);
hpx->SetFillColor(48);
TH2F *hpxpy = new TH2F("hpxpy","py vs px",40,-4,4,40,-4,4);
TProfile *hprof = new TProfile("hprof","Profile of pz versus px",100,-4,4,0,20);
TNtuple *ntuple = new TNtuple("ntuple","Demo ntuple","px:py:pz:random:i");
hfile->Write();
// http server with port 8080, use jobname as top-folder name
THttpServer* serv = new THttpServer(Form("http:8080?top=%s", jobname));
// fastcgi server with port 9000, use jobname as top-folder name
// THttpServer* serv = new THttpServer(Form("fastcgi:9000?top=%s_fastcgi", jobname));
// dabc agent, connects to DABC master_host:1237, works only when DABC configured
// THttpServer* serv = new THttpServer(Form("dabc:master_host:1237?top=%s_dabc", jobname));
// when read-only mode disabled one could execute object methods like TTree::Draw()
serv->SetReadOnly(kFALSE);
// One could specify location of newer version of JSROOT
// serv->SetJSROOT("https://root.cern.ch/js/latest/");
// serv->SetJSROOT("http://jsroot.gsi.de/latest/");
gBenchmark->Start(jobname);
// Create a new canvas.
TCanvas *c1 = new TCanvas("c1","Dynamic Filling Example",200,10,700,500);
c1->SetFillColor(42);
c1->GetFrame()->SetFillColor(21);
c1->GetFrame()->SetBorderSize(6);
c1->GetFrame()->SetBorderMode(-1);
// Fill histograms randomly
TRandom3 random;
Float_t px, py, pz;
const Int_t kUPDATE = 1000;
Long64_t i = 0;
while (true) {
random.Rannor(px,py);
pz = px*px + py*py;
Float_t rnd = random.Rndm(1);
hpx->Fill(px);
hpxpy->Fill(px,py);
hprof->Fill(px,pz);
// fill only first 25000 events in NTuple
if (i<25000) ntuple->Fill(px,py,pz,rnd,i);
if (i && (i%kUPDATE) == 0) {
if (i == kUPDATE) hpx->Draw();
c1->Modified();
c1->Update();
if (i == kUPDATE) hfile->Write();
if (gSystem->ProcessEvents()) break;
}
i++;
if ((maxcnt>0) && (i>=maxcnt)) break;
}
gBenchmark->Show(jobname);
}
TFile *hsimple(Int_t get=0)
{
// This program creates :
// - a one dimensional histogram
// - a two dimensional histogram
// - a profile histogram
// - a memory-resident ntuple
//
// These objects are filled with some random numbers and saved on a file.
// If get=1 the macro returns a pointer to the TFile of "hsimple.root"
// if this file exists, otherwise it is created.
// The file "hsimple.root" is created in $ROOTSYS/tutorials if the caller has
// write access to this directory, otherwise the file is created in $PWD
TString filename = "hsimple.root";
TString dir = gSystem->UnixPathName(gInterpreter->GetCurrentMacroName());
dir.ReplaceAll("hsimple.C","");
dir.ReplaceAll("/./","/");
TFile *hfile = 0;
if (get) {
// if the argument get =1 return the file "hsimple.root"
// if the file does not exist, it is created
TString fullPath = dir+"hsimple.root";
if (!gSystem->AccessPathName(fullPath,kFileExists)) {
hfile = TFile::Open(fullPath); //in $ROOTSYS/tutorials
if (hfile) return hfile;
}
//otherwise try $PWD/hsimple.root
if (!gSystem->AccessPathName("hsimple.root",kFileExists)) {
hfile = TFile::Open("hsimple.root"); //in current dir
if (hfile) return hfile;
}
}
//no hsimple.root file found. Must generate it !
//generate hsimple.root in current directory if we have write access
if (gSystem->AccessPathName(".",kWritePermission)) {
printf("you must run the script in a directory with write access\n");
return 0;
}
hfile = (TFile*)gROOT->FindObject(filename); if (hfile) hfile->Close();
hfile = new TFile(filename,"RECREATE","Demo ROOT file with histograms");
// Create some histograms, a profile histogram and an ntuple
TH1F *hpx = new TH1F("hpx","This is the px distribution",100,-4,4);
hpx->SetFillColor(48);
TH2F *hpxpy = new TH2F("hpxpy","py vs px",40,-4,4,40,-4,4);
TProfile *hprof = new TProfile("hprof","Profile of pz versus px",100,-4,4,0,20);
TNtuple *ntuple = new TNtuple("ntuple","Demo ntuple","px:py:pz:random:i");
gBenchmark->Start("hsimple");
// Create a new canvas.
TCanvas *c1 = new TCanvas("c1","Dynamic Filling Example",200,10,700,500);
c1->SetFillColor(42);
c1->GetFrame()->SetFillColor(21);
c1->GetFrame()->SetBorderSize(6);
c1->GetFrame()->SetBorderMode(-1);
// Fill histograms randomly
TRandom3 random;
Float_t px, py, pz;
const Int_t kUPDATE = 1000;
for (Int_t i = 0; i < 25000; i++) {
random.Rannor(px,py);
pz = px*px + py*py;
Float_t rnd = random.Rndm(1);
hpx->Fill(px);
hpxpy->Fill(px,py);
hprof->Fill(px,pz);
ntuple->Fill(px,py,pz,rnd,i);
if (i && (i%kUPDATE) == 0) {
if (i == kUPDATE) hpx->Draw();
c1->Modified();
c1->Update();
if (gSystem->ProcessEvents())
break;
}
}
gBenchmark->Show("hsimple");
// Save all objects in this file
hpx->SetFillColor(0);
hfile->Write();
hpx->SetFillColor(48);
c1->Modified();
return hfile;
// Note that the file is automatically close when application terminates
// or when the file destructor is called.
}