Chi or any one else,
I'm trying to veto on a number of wire hits for each track. But it
seems that individual track holds no such information. Any suggestions
on the work around?
Cheers, Vitaliy
Chi Zhang wrote:
>Hi, I may know what is the problem. make sure you open dst with the proper
>"mode":
> dst.Open(*gRecon, gOpt->DstFile(irun), "READ", "MACRO");
>the "MACRO" is important.
>
>Chris and I decided in the design phase that a few "modes" are
>implemented. "MICRO", "MESSO" and "MACRO". In "MICRO" mode, epics and
>scaler trees status are set to 0 so the reading of the dst is faster.
>while in "MACRO" mode, all branches are active.
>
>I just update the dst_filter.C macro and I can read non-trivial
>epics/scaler information out from dst-8136.root. It is a <100 line macro.
>if it is not much trouble, you can compare your code to it. make sure you
>update it, a couple lines are patched for compatibility.
>
>Chi
>
>On Tue, 31 Aug 2004, vitaliy ziskin wrote:
>
>
>
>>Chi,
>>that's exactly what I do.
>>I do :
>>
>>dst.Open(...)
>>.....................
>>dst.GetEntry(iev)
>>
>>Both dst.fEvent->fNEpics and dst.fEvent.fNScaler give me non-zero
>>value, but the values of epics and scaler variables are zero.
>>
>> Vitaliy
>>
>>
>>Chi Zhang wrote:
>>
>>
>>
>>>Hi, next time, maybe paste the relevant code blocks which makes it easier
>>>than to guess what might be wrong.
>>>
>>>if you do:
>>> TBLDst dst;
>>> dst.Open(...);
>>> dst.GetEntry(i); // here dst is a TBLDst Object
>>>then dst.fEpics and dst.fScaler should be filled.
>>>
>>>if you do:
>>> TBLDst dst;
>>> dst.Open(...);
>>> dst.dst->GetEntry(i); // dst.dst being a ROOT Tree
>>>then dst.fEpics and dst.fScaler would be empty.
>>>
>>>TBLDst::GetEntry(int) is a wrapper arround TTree::GetEntry(int) which
>>>after calling TTree::GetEntry(int i) upon dst::dst, executes:
>>>
>>> if (fEvent->fNEpics>-1 && fEvent->fNEpics<nepics) {
>>> nbits += epics ->GetEntry(fEvent->fNEpics);
>>> while(fFill->fFillNumber<fEpics->fFillNumber) {
>>> GetNextFill();
>>> }
>>> }
>>> else
>>> fEpics->Clear(true);
>>>
>>> if (fEvent->fNScaler>-1 && fEvent->fNScaler<nscaler)
>>> nbits += scaler->GetEntry(fEvent->fNScaler);
>>> else
>>> fScaler->Clear(true);
>>>
>>>Try use TBLDst::GetEntry(int).
>>>
>>>Also after TBLDst::GetEntry(), if dst.fEpics and dst.fScaler are still
>>>empty, try:
>>> cout<<dst.fEvent->fNEpics<<" "<<dst.fEvent.fNScaler<<endl;
>>>if they are -1 then this physics event is not linked to any epics/scaler
>>>events. then dst.fEpics and dst.fScaler should be empty too.
>>>
>>>if these numbers are none 0 yet you still have empty fEpics and fScaler,
>>>then there s a problem I need to fix.
>>>
>>>Physics events not linked to scaler events might be problematic in terms
>>>of integrated charge. those not linked to epics events might be less of a
>>>problem.
>>>
>>>Chi
>>>
>>>On Tue, 31 Aug 2004, vitaliy ziskin wrote:
>>>
>>>
>>>
>>>
>>>
>>>>When I try to get information about dst.fEpics and dst.fScaler variables
>>>>I get all zeros (for example dst.fEpics->fFillNumber). dst.fEvent seems
>>>>to work ok. Why is that? Does this mean that the scaler and epics info
>>>>is not loaded into the dst? I'm using runs 8138 and 8136.
>>>>
>>>> I would appreciate your help,
>>>>Vitaliy
>>>>
>>>>
>>>>
>>>>
>>>>
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