Hi Daan,
Form is a nice utility, but it accepts only int, double and chars, not float
or shorts.
In your case use a Double_t array or cast (Double_t)zs[0]
Rene Brun
daan wrote:
>
> Hi,
>
> I tried to do the following in a root script:
>
> Float_t zs[4] = {-55, 105, 305, 525};
> TCanvas canv;
> n1f1->Draw("prob:t_phot",Form("z == %f && rho == 9 && phi > 1.3 && phi < 1.5",zs[0]),"");
>
> The script opens a canvas, displays the date (thanks to SetOptDate()), but
> does not display a plot of the ntuple "n1f1". The Form does not substitute
> the %f with zs[0] and thus a plot cannot be drawn.
>
> How can I use the Form() then in the selection part of the TNtuple::Draw()
> method?
>
> daan
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