Hi Ben,
Zooming the Y axis of a TF1 was not implemented.
It is now implemented in the CVS version.
Thanks for this remark.
Rene Brun
On Thu, 27 Jun 2002, Ben Kilminster wrote:
> Hi,
>
> Is there a reason one can't use the mouse to zoom in on the y axis of a
> TF1 ?
>
> Here is an example where one can zoom in on the x and y axis with the
> mouse for a TGraph, but not so for a TF1. (root v3_02_07c, Linux+2.2)
>
> {
> new TCanvas();
> c1->Divide(1,2);
>
> // Make a graph
> int N = 100;
> int i = 0;
> double X[N], Y[N];
> for (double d = -5; d < 4.9; d+= 0.1)
> {
> X[i] = d;
> Y[i] = (d+0.5)*(d+0.5)+ 3.0 ;
> i++;
> }
> TGraph *G = new TGraph(N,X,Y);
> c1->cd(1);
> // I can zoom the x and y axes with the mouse
> G->Draw("AC");
>
> // Make a function
> TF1 *F = new TF1("F","(x+0.5)*(x+0.5)+3.0",-5,5);
> c1->cd(2);
> // I can only zoom the x axis with the mouse
> F->Draw();
>
> // But the following work
> // F->SetMinimum(2);
> // F->SetMaximum(7);
>
> }
>
>
> Cheers,
> Ben
>
>
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