Hi Marieke, You do not see the second graph because it is outside the range of the first graph. Your first graph goes between 7.2 and 7.8 Your second graph between 6.38 6.45 Two solutions; -set a minimum for the y scale of the first graph, eg inputSpec->SetMinimum(6.3); -use a TMultigraph (see example in tutorial multigraph.C) Rene Brun Marieke Navin wrote: > > Dear all, > Can anyone offer advice for my simple graph? I have 3 columns of data: x, > y1 and y2. I want to plot x versus y1 and x versus y2 (dashed line) on > the same graph but at present it's only plotting the a versus y1. I know > it's something simple, > Many thanks, > Marieke > > -- > -------------------------------------------------------------------- > | Miss Marieke Navin wk:+441142223553 | > | Particle Physics and Particle Astrophysics fx:+441142728079 | > | Department of Physics and Astronomy hm:+441142584467 | > | University of Sheffield mb:07919687122 | > | Hicks Building, Hounsfield Road | > | Sheffield, | > | S3 7RH, United Kingdom | > | M.Navin@Shef.ac.uk | > -------------------------------------------------------------------- > > -------------------------------------------------------------------------------- > Name: width_beacongraphs.C > width_beacongraphs.C Type: Plain Text (TEXT/PLAIN) > Encoding: BASE64 > Description: code > > Name: width_6face.dat > width_6face.dat Type: Plain Text (TEXT/PLAIN) > Encoding: BASE64 > Description: data
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