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seism.C File Reference

Detailed Description

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Strip chart example.

#include "TStopwatch.h"
#include "TDatime.h"
#include "TStyle.h"
#include "TH1F.h"
#include "TCanvas.h"
#include "TSystem.h"
#include "TRandom.h"
#include <cstdio>
void seism() {
TStopwatch sw; sw.Start();
//set time offset
gStyle->SetTimeOffset(dtime.Convert());
TCanvas *c1 = new TCanvas("c1","Time on axis",10,10,1000,500);
c1->SetGrid();
Float_t bintime = 1; //one bin = 1 second. change it to set the time scale
TH1F *ht = new TH1F("ht","The ROOT seism",10,0,10*bintime);
ht->SetMaximum( signalval);
ht->SetMinimum(-signalval);
ht->SetStats(false);
ht->SetLineColor(2);
ht->GetXaxis()->SetTimeDisplay(1);
ht->GetYaxis()->SetNdivisions(520);
ht->Draw();
for (Int_t i=1;i<2300;i++) {
//======= Build a signal : noisy damped sine ======
if (i > 700) noise += signalval*sin((i-700.)*6.28/30)*exp((700.-i)/300.);
ht->SetBinContent(i,noise);
c1->Modified();
c1->Update();
gSystem->ProcessEvents(); //canvas can be edited during the loop
}
printf("Real Time = %8.3fs, Cpu Time = %8.3fs\n",sw.RealTime(),sw.CpuTime());
}
int Int_t
Definition RtypesCore.h:45
float Float_t
Definition RtypesCore.h:57
ROOT::Detail::TRangeCast< T, true > TRangeDynCast
TRangeDynCast is an adapter class that allows the typed iteration through a TCollection.
R__EXTERN TRandom * gRandom
Definition TRandom.h:62
R__EXTERN TStyle * gStyle
Definition TStyle.h:436
R__EXTERN TSystem * gSystem
Definition TSystem.h:572
The Canvas class.
Definition TCanvas.h:23
This class stores the date and time with a precision of one second in an unsigned 32 bit word (950130...
Definition TDatime.h:37
1-D histogram with a float per channel (see TH1 documentation)
Definition TH1.h:622
virtual Double_t Gaus(Double_t mean=0, Double_t sigma=1)
Samples a random number from the standard Normal (Gaussian) Distribution with the given mean and sigm...
Definition TRandom.cxx:275
Stopwatch class.
Definition TStopwatch.h:28
void SetTimeOffset(Double_t toffset)
Change the time offset for time plotting.
Definition TStyle.cxx:1913
virtual Bool_t ProcessEvents()
Process pending events (GUI, timers, sockets).
Definition TSystem.cxx:416
return c1
Definition legend1.C:41
Author
Rene Brun

Definition in file seism.C.