Dears,
I have 2 Tgraph in one Multigraph, but the values of these 2 graph are different (an order of difference), so the values of one graph are good and the values of other graph, which are lower, appear almost to zero… so what I would like to do is “rescale” the 2nd graph and ad a second y2 axis on right (with the real values of y2). I already checked the guide and other posts in the forum but I didn’t found what I nedd…
Below an example of data in inpunt and the code which I tried to write…
data example:
1 10 200
2 20 300
3 30 400
4 40 500
tree1= TTree ("tree1","tree1")
tree1.ReadFile("myfile.csv","a/I:b/I:c/I",'\t')
def slopevsTime(gap):
canvas = TCanvas("canvas","canvas", 600, 600)
gPad.SetGrid()
canvas.SetTopMargin(.08)
canvas.SetRightMargin(0.05)
canvas.SetBottomMargin(0.13)
canvas.SetLeftMargin(0.16)
canvas.SetBorderSize(2)
canvas.SetFrameFillStyle(0);
canvas.SetFrameBorderMode(0);
canvas.SetFrameFillStyle(0);
canvas.SetFrameBorderMode(0);
gr1= TMultiGraph()
gr1.Draw( 'AP' )
########
n=tree1.Draw("a:b:c","","goff")
x= tree1.GetV1()
y= tree1.GetV2()
grR= TGraph(n,x,y)
grR.SetMarkerStyle(4)
grR.SetMarkerSize(0.9)
grR.SetMarkerColor(2)
grR.SetLineColor(2)
grR.Draw( 'AP' )
gr1.Add(grR)
######## 2 plot
x2= tree1.GetV1()
y2= tree1.GetV3()
grI= TGraphErrors(n,x2,y2) #inizializza grafico
grI.SetMarkerStyle(26)
grI.SetMarkerSize(0.9)
grI.SetMarkerColor(4)
grI.SetLineColor(4)
grI.Draw( 'AP' )
gr1.Add(grI)
######## TMultigraph
gr1.Draw("AP")
Thanks a lot in advance for your help!! 