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Hi Rene, For example, I want to generate a graph with the following script: { gROOT -> Reset(); Int_t n = 7; Double_t ecm[n]; Double_t nlr[n]; ecm[0]=350 ; nlr[0]=0.80703; ecm[1]=370 ; nlr[1]=0.781981; ecm[2]=390 ; nlr[2]=0.762459; ecm[3]=410 ; nlr[3]=0.740626; ecm[4]=430 ; nlr[4]=0.718904; ecm[5]=450 ; nlr[5]=0.698587; ecm[6]=470 ; nlr[6]=0.677837; TGraph *theplot = new TGraph(n, ecm, nlr); theplot -> Draw("AL"); } I obtain a graph, but it doesn't include the orgin. I can fix this (in the y-direction only) by including a line before the graph is drawn: theplot -> SetMinimum(0); However, it seems I cannot do the same for the x-direction (axis). I was wondering if there was a way to do that. I hope this makes my question more clear. I'm using ROOT 3.10-02. -Kalen ----------------------------------------------------------------- On Wed, 7 Jan 2004, Rene Brun wrote: > Hi Kalen, > > I do not understand this problem. Could you send me the shortest > possible script reproducing it? Which version are you using? > > Rene Brun > > On Wed, 7 Jan > 2004, Kalen Martens wrote: > > > > > I have created a TGraph object from two arrays of Double_t data. All of > > the data is in the 1st quadrant. When I do a TGraph::Draw(), the graph is > > displayed nicely except that the zeroes are not included on the axes. I > > found that by using TGraph::SetMinimum() I can change the boundaries of > > the graph in the y-direction to include zero. However, I cannot see a way > > to achieve the same thing in the x-direction. Is there a way to do this? > > > > Many thanks in advance, > > -Kalen > > > > ----------------------------------------------------------------- > > - Kalen Martens Ph:(416)-978-6632 - > > - Dept. of Physics - > > - University of Toronto, Toronto, Canada - > > ----------------------------------------------------------------- > > >

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