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chenyi |
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#include <iostream>
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#include <fstream>
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#include <vector>
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using namespace std;
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#include "TFile.h"
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#include "TGraphErrors.h"
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void PlotThreeColumnFile(char *filename, char *outputfilename)
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{
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ifstream in(filename);
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TFile out(outputfilename, "RECREATE");
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vector<double> xData;
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vector<double> yData;
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vector<double> errorData;
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while(in)
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{
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double xTemp = 0;
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double yTemp = 0;
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double errorTemp = 0;
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in >> xTemp >> yTemp >> errorTemp;
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xData.push_back(xTemp);
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yData.push_back(yTemp);
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errorData.push_back(errorTemp);
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}
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double *xArray = new double[xData.size()];
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double *yArray = new double[yData.size()];
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double *errorArray = new double[errorData.size()];
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for(int i = 0; i < (int)xData.size(); i++)
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{
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xArray[i] = xData[i];
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yArray[i] = yData[i];
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errorArray[i] = errorData[i];
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}
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TGraphErrors graph(xData.size(), xArray, yArray, 0, errorArray);
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graph.Write();
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delete[] errorArray;
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delete[] yArray;
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delete[] xArray;
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out.Close();
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in.close();
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}
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