Re: Copy branch/leaf

Hi,

This may works also, but the 'friendship' is more aligned with what you need (i.e. simpler to use for your case).

Cheers,
Philippe.

On 2/18/11 9:11 AM, Hovhannes Khandanyan wrote:
> Dear Marcello,
>
> This could be an elegant solution, although I have no experience with using TEventList/TEntryList created by one tree and used for
> another.
>
> Thanks,
> Hovhannes
>
>
> On Feb 18, 2011, at 3:56 PM, Marcelo Zimbres wrote:
>
>> Dear Hovhannes,
>>
>> > I have a large analysis NTuple out of which I create a light-weight one which stored eg parameter flagging good events ...
>>
>> wouldn't it be enough to store good entries in an TEventList or TEntryList?
>>
>> Cheers,
>> Marcelo
>>
>>
>>
>> 2011/2/18 Hovhannes Khandanyan <khandan_at_cern.ch <mailto:khandan_at_cern.ch>>
>>
>> Hi Pilippe,
>>
>>
>> >> What I need is to copy branch1.leaf1 from Tree2 to Tree1.
>> >
>> > Why? What you goal/aim?
>>
>> I have a large analysis NTuple out of which I create a light-weight one which stored eg parameter flagging good events. What
>> I need is to be able to use this flag to look into parameters stored in the original ntuple.
>>
>>
>> >
>> > To associate 2 TTree with related information, we recommend using the TTree Friend concept.
>> >
>> > I.e. the simple way to achieve some similar to what you want is:
>> >
>> > Tree1->AddFriend(Tree2);
>>
>> This is exactly what I needed.
>>
>> Thanks,
>> Hovhannes
>>
>>
>> >
>> > Cheers,
>> > Philippe.
>> >
>> > On 2/15/11 9:23 AM, Hovhannes Khandanyan wrote:
>> >> Dear ROOTers,
>> >>
>> >> I have 2 trees that were created from the same data file i.e both tress contain the exact same number of events.:
>> >>
>> >> Tree1 - leaf1, leaf2, ...
>> >>
>> >> Tree2 - branch1.leaf1, branch1.leaf2..., branch2.leaf1....
>> >>
>> >> What I need is to copy branch1.leaf1 from Tree2 to Tree1. Please let em know if this is doable and if so where I can find
>> reference/example code.
>> >>
>> >> Thank you,
>> >> Hovhannes
>> >>
>>
>>
>
Received on Fri Feb 18 2011 - 22:45:53 CET