Hello, ..a beginers questions. Does somebody has an example of how one can use functions on pre-defined functions ? What should one do, if one e.g. wants to plot the logarithm of a landau-distribution which is predefined in root. lan = new TF1("Landau","log(landau)",binmin,binmax); seems to work, but is there a more general way, e.g. if one of the function is user-defined ? I also could not understand the syntax how to divide to functions, e.g. two polynominals. Thank you for your help. Tancredi Carli,
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