Hello, My root is v3.2. linux. I have question about the constructor of TH1D. root[] TVectorD v(10); root[] for(int i=0;i<10;i++) v(i) = i; root[] TH1D hist(v); root[] hist.Draw(); This draw only blank TH2 frame. Masahiro Sugaya Univ. of Tokyo. email: sugayam@post.kek.jp
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