Hi Ville,
You have a typo (O instead of 0). The statement should be:
data->Fit("f", "0Q");
Rene Brun
On Mon, 14 Aug 2000, Ville Axel Bergholm wrote:
>
> Hi,
>
> for some reason the O option in TH1::Fit() doesn't seem to work.
> The following code shouldn't draw the histogram, but it does.
> Strangely, the source code (viewed through the class category
> documentation) seems to be OK?
>
>
> TF1 *theory = new TF1("theory", "expo(0)", 0, 1);
> theory->SetParameters(1, -1);
> TH1D *data = new TH1D("data", "raw data", 20, 0, 1);
> data->FillRandom("theory", 500);
> TF1 *f = new TF1("f", "pol3(0)", 0, 1);
> data->Fit("f", "OQ"); // the histogram gets drawn!
>
>
> Please send a reply also to my e-mail address.
>
>
> Ville
>
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