Re: analyzing some events, not all

[David Lawrence <davidl@jlab.org>]

Hi All,

    I have recently committed a modification to JANA that will allow one 
to specify a number of events to skip and then a number to process. I am 
still testing it, but it will be in the next JANA release.

    Elton's suggestion of being able to feed a list of specific events 
to process is a good one that will address another commonly encountered 
situation. I will think how best to implement that as well.

Regards,

Elton Smith wrote:
> Hi Mark and David,
>
> The option to scan a specific list of events is EXTREMELY useful,
> especially in combination with the same capability in the event display. A
> very general way to implement this is to have the option for the analysis
> (or event display) to process events off an ascii file list of event
> numbers.  This removes any complexity (i.e. logic) in creating the list
> from the analysis programs. It also allows the event list to edited by
> hand (which is sometimes useful).
>
> That's my proposal for implementation of such a capability.
>
> Cheers, Elton.
>
>
>
>
>
> Elton Smith
> Jefferson Lab MS 12H5
> 12000 Jefferson Ave
> Suite # 16
> Newport News, VA 23606
> elton@jlab.org
> (757) 269-7625
> (757) 269-6331 fax
>
> On Thu, 17 Jul 2008, David Lawrence wrote:
>
>   
>> Hi Mark,
>>
>>     Currently, there are no options to have JANA skip events and read
>> only a subset of them as you describe. It would not be a hard feature to
>> implement, it just hasn't been done. I will add that to the JANA wiki
>> page where I try to keep track of future improvements:
>>
>> http://www.jlab.org/Hall-D/software/wiki/index.php/JANA/DANA
>>
>> Regards,
>> -David
>>
>> Mark M. Ito wrote:
>>     
>>> Dave,
>>>
>>> I know I have asked this before, but I don't recall the answer: is there
>>> a way in jana to analyze a subset of events, say only the first 100
>>> and/or only events listed in a file? I remember you had a way to specify
>>> configuration parameters but don't remember if these options exist.
>>>
>>> I do remember that you referred me to hddm_cull_events. I have tried
>>> that and it works very well, especially for the single event scenario.
>>> It would also work for the 100 event scenario mentioned above, but I am
>>> still curious about having the jana program select the events.
>>>
>>>  -- Mark
>>>
>>>
>>>       
>> --
>>
>> ------------------------------------------------------------------------
>>   David Lawrence Ph.D.
>>   Staff Scientist                 Office: (757)269-5567   [[[  [   [ [
>>   Jefferson Lab                   Pager:  (757)584-5567   [  [ [ [ [ [
>>   http://www.jlab.org/~davidl     davidl@jlab.org         [[[  [[ [[ [[[
>> ------------------------------------------------------------------------
>>
>>
>>
>>     

-- 

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  David Lawrence Ph.D.
  Staff Scientist                 Office: (757)269-5567   [[[  [   [ [       
  Jefferson Lab                   Pager:  (757)584-5567   [  [ [ [ [ [   
  http://www.jlab.org/~davidl     davidl@jlab.org         [[[  [[ [[ [[[
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