Hi Suzanne,
do
TH1F h("h","h",128,0,128);
h.GetXaxis()->SetNdivisions(-8);
h.Draw();
Rene
Suzanne Panacek wrote:
>
> Hi,
> Does anyone know how to set the position of the first grid line on a display
> of a histogram?
> In a histogram with an axis from 1-128, we would like to draw a gridline
> every 16 bins, with the first starting at 16.
>
> his->GetYaxis()->SetNdivision(8)
> Set the divisons, but what we see are lines at 20, 40,...,120. And
> we want them at 16, 32,...,128.
>
> Suzanne Panacek
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