以前のリビジョンの文書です
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====== Fitting ======
----
===== 簡単な例 =====
TH1F *hist = new TH1F("hist","hist",100,-10,10);
hist->FillRandom("gaus",10000);
hist->Fit("gaus","","",-10,10);
としてやればガウシアンでのfittingの例が得られる。
===== 任意の関数でfitting =====
TF1 *func = new TF1("func","[0] + [1]*x", -10 , 10);
hist->Fit("func","","",-10,10);
のようにして、先にfittingするための関数を用意してやり、Fitでそれを指定する。