Dear Rooters, After this two lines: TCut cut = "trf > 330 && trf <900"; t->Draw("(epsd+depsd):trf","(epsd+depsd) < 2700 && (epsd+depsd) > 1400 && cut","",30000,1); I am getting: *ERROR 30 : Bad numerical expression : "cut" cut is a string, how to incorporate it to selection string ? Thank you, Boris. -- ------------------------------------------------ | Boris Skorodumov, | Graduate Student, Physics Department, | University of Notre Dame, | Notre Dame, IN 46556, USA | WWW: www.nd.edu/~bskorodo ------------------------------------------------
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