A macro to demonstrate the functionality of TGraph::Apply() method.
TGraph::Apply applies a function f
to all the data TGraph points, f
may be a 1-D function TF1 or 2-d function TF2. The Y values of the graph are replaced by the new values computed using the function.
The Apply() method can be used as well for TGraphErrors and TGraphAsymmErrors.
Definition in file gr005_apply.C.