以前のリビジョンの文書です
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====== TGraphErrors ====== TGraph の上位互換（TGraphを継承している）なので、基本的にこちらを使っておけばよい。 ---- ===== コンストラクタ ===== TGraphErrors(Int_t n, const Float_t* x, const Float_t* y, const Float_t* ex = 0, const Float_t* ey = 0) TGraphErrors(Int_t n, const Double_t* x, const Double_t* y, const Double_t* ex = 0, const Double_t* ey = 0) TGraphErrors(const TVectorF& vx, const TVectorF& vy, const TVectorF& vex, const TVectorF& vey) TGraphErrors(const TVectorD& vx, const TVectorD& vy, const TVectorD& vex, const TVectorD& vey) TGraphErrors(const TGraphErrors& gr) TGraphErrors& operator=(const TGraphErrors& gr) TGraphErrors(const TH1* h) TGraphErrors(const char* filename, const char* format = "%lg %lg %lg %lg", Option_t* option = "") など色々ある。\\ ４つの変数は全て同じ型でないといけない（はず）。\\ ===== 使い方 ===== ==== 例１ ==== <code c> void example1() { TCanvas *c = new TCanvas("c","c",600,600); c->cd(); TH1F *frame = gPad->DrawFrame( 0. , 0. , 12. , 120. ); const Int_t NPOINT = 5; Float_t X[NPOINT] = { 1. , 3. , 5. , 8. , 10. }; Float_t Y[NPOINT] = { 10. , 30. , 50. , 80. , 100. }; Float_t eX[NPOINT] = { 0.1 , 0.3 , 0.5 , 0.8 , 1. }; Float_t eY[NPOINT] = { 1. , 3. , 5. , 8. , 10. }; TGraphErrors *g = new TGraphErrors(NPOINT,X,Y,eX,eY); g->SetMarkerStyle( 20 ); g->SetMarkerSize( 1.0 ); g->Draw("PC"); } </code> {{:ja:root:tgrapherrors_ex1.png?600|}} ==== 例２ ==== ==== 例３ ==== 以下のようなデータファイルを用意する。 <code c> 1.0 10.0 0.1 1.0 2.0 20.0 0.2 2.0 3.0 30.0 0.3 3.0 4.0 40.0 0.4 4.0 5.0 50.0 0.5 5.0 6.0 60.0 0.6 6.0 7.0 70.0 0.7 7.0 8.0 80.0 0.8 8.0 9.0 90.0 0.9 9.0 10.0 100.0 1.0 10.0 </code> <code c> void example3() { TCanvas *c = new TCanvas("c","c",600,600); c->cd(); TH1F *frame = gPad->DrawFrame( 0. , 0. , 12. , 120. ); TGraphErrors *g = new TGraphErrors("data.dat","%lg %lg %lg %lg",""); g->SetMarkerStyle( 20 ); g->SetMarkerSize( 1.0 ); g->Draw("PC"); } </code>
