Logo ROOT   6.14/05
Reference Guide
seism.C File Reference

Detailed Description

View in nbviewer Open in SWAN Strip chart example.

pict1_seism.C.png
#include "TStopwatch.h"
#include "TDatime.h"
#include "TStyle.h"
#include "TH1F.h"
#include "TCanvas.h"
#include "TSystem.h"
#include "TRandom.h"
#include <stdio.h>
void seism() {
TStopwatch sw; sw.Start();
//set time offset
TDatime dtime;
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);
Float_t signalval = 1000;
ht->SetMaximum( signalval);
ht->SetMinimum(-signalval);
ht->SetStats(0);
ht->SetLineColor(2);
ht->GetYaxis()->SetNdivisions(520);
ht->Draw();
for (Int_t i=1;i<2300;i++) {
//======= Build a signal : noisy damped sine ======
Float_t noise = gRandom->Gaus(0,120);
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());
}
Author
Rene Brun

Definition in file seism.C.