Hello,

in the doc of TGraph, one reads

[quote]Double_t fMaximum Maximum value for plotting along y

Double_t fMinimum Minimum value for plotting along y[/quote]

How I understand that is that fMaximum contain the highest value among all the points of the TGraph

For example, if I do

```
float x[3] = {0,1,2};
float y[3] = {10, 20, 30};
TGraph *g = new TGraph (3,x,y);
cout << g->GetMaximum() <<endl;
```

I expect to get 30

However, I get -1111 as for GetMinimum().

Am I misunderstood the doc or is there a bug?

In the first case, is there a way to get automatically the highest/lowest value of a set of points in a TGraph?

Thank you in advance.