Difference between revisions of "ForestErrAnal Lab 8.C"

From New IAC Wiki
Jump to navigation Jump to search
 
(One intermediate revision by one other user not shown)
Line 1: Line 1:
 
<pre>
 
<pre>
 +
#include "Riostream.h"
 
void DataRead() {
 
void DataRead() {
 
   TH1F *LengthHist=new TH1F("LengthHist","LengthHist",30,18.45,21.45);
 
   TH1F *LengthHist=new TH1F("LengthHist","LengthHist",30,18.45,21.45);
Line 22: Line 23:
 
}
 
}
 
</pre>
 
</pre>
 +
 +
 +
Go Back [[TF_ErrAna_InClassLab#Lab_8]]

Latest revision as of 21:27, 3 March 2017

#include "Riostream.h"
void DataRead() {
  TH1F *LengthHist=new TH1F("LengthHist","LengthHist",30,18.45,21.45);
  ifstream in;
  in.open("length.dat");
  Float_t Length,LengthErr;
  Int_t Counts;
  Int_t nlines=0;
  while(in.good()){
    in >> Length >> Counts;
     if(Counts>0)
       LengthErr=0.5/sqrt(Counts);
     printf( " %d \t %f +/- %f \t %d\n", nlines, Length, LengthErr, Counts);
    /*                                                                            
    */
    nlines++;

    LengthHist->Fill(Length,Counts);

  }
  LengthHist->Draw();
}


Go Back TF_ErrAna_InClassLab#Lab_8