Re: MyHist_2D ->Draw()

From: <asaddiqu_at_ualberta.ca>
Date: Mon, 9 Aug 2010 11:58:42 -0600

I already tried this option as well. But doesn't work.

Cheers, Asif

Quoting "Andy Mastbaum" <mastbaum_at_hep.upenn.edu>:

> To get a TH2F object named "myhist_2D" from a file, you can always
> do something like:
>
> TFile f("your_file.root")
> TH2F *myhisto = (TH2F*) f.Get("myhist_2D")
> myhisto->Draw()
>
> Cheers,
> Andy
>
> On 08/09/2010 01:22 PM, Marc Escalier wrote:
>> Hi,
>>
>> did you check if your histogram was not inside a subdirectory of your
>> file ?
>>
>> =====
>>
>> On Mon, 9 Aug 2010, asaddiqu_at_ualberta.ca wrote:
>>
>>>
>>> Hi,
>>>
>>> I can view my 2D histogram by "TBrowser" but whenever i try to see it
>>> by "Draw()".
>>> It shows an error message which is following.
>>>
>>> ============================================
>>> root[1] myhist_2D->Draw()
>>> Error: Symbol myhist_2D is not defined in current scope FILE:(tmpfile)
>>> LINE:1
>>> Error: Failed to evaluate myhist_2D->Draw()Possible candidates are...
>>> filename line:size busy function type and name
>>> =============================================
>>>
>>> Unfortunately, i am using an older version of root{4.00/08 December
>>> 2004 } but there should be no problem of version with this basic thing.
>>>
>>> Cheers, Asif
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>
>
Received on Mon Aug 09 2010 - 19:58:57 CEST

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