Re: Memory troubles when adding weights to a tree->Draw()

Hi,

Can you send me a complete running example showing this problem?

Thanks,
Philippe.

On 1/18/11 11:26 AM, Chris Parkinson wrote:
> Hi Philippe
>
> Yes, the problem remains with the function defined in this way.
>
> Thanks
>
> Chris
>
> On 18 January 2011 15:06, Philippe Canal <pcanal_at_fnal.gov <mailto:pcanal_at_fnal.gov>> wrote:
>
> Hi Chris,
>
> Do you see the same problem with using:
>
>
>
> map<Int_t,Double_t> theMap;
> double getMap(Int_t );
>
> //main body of program here
>
> double getMap(Int_t evNum){
> return theMap[evNum];
> }
>
> Philippe.
>
>
> On 1/18/11 7:42 AM, Chris Parkinson wrote:
>> Hi rooters
>>
>> I'm having memory issues when trying to add weight information to a histogram. I book the histogram:
>>
>> TH1F* ht = new TH1F("ht","title;x;y",100,
>> xlow,xhigh);
>>
>> and fill it with information from a tree:
>>
>> tree->Draw("X>>ht","(getMap(NUM))*(" + cuts + ")");
>>
>> where X and NUM are branches in the tree, 'cuts' is a TString containing some cuts to be applied, getMap is a function that I
>> have defined to get values from 'theMap':
>>
>> map<Int_t,Double_t> theMap;
>> double getMap(Int_t &);
>>
>> //main body of program here
>>
>> double getMap(Int_t & evNum){
>> return theMap[evNum];
>> }
>>
>> I am filling the histogram repeatedly in a loop (24k iterations). With the weight information, after approximately 600
>> iterations, the memory usage begins increasing steadily until the program freezes. When I fill the histogram in the same way
>> without the weight information, tree->Draw("X>>ht","cuts"); , I don't (appear to) have any problem.
>>
>> I've tried using ROOT versions 5.26.00 and 5.28.00.
>>
>> Thanks in advance
>>
>> Chris
>
>
Received on Tue Jan 18 2011 - 19:01:50 CET