[ROOT] running sum of arrays ?

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Hello Rooters,

Would it be possible to add a function (in the 
spirit of sigma's like sumv):

TArrayD 
TArrayD::RunningSum()
{
  TArrayD result(fN);

  Double_t cur_sum = 0;
  for (Int_t i=0; i<fN; i++) 
    { cur_sum += fArray[i]; 
      result.AddAt(cur_sum,i);
    }

  return result;

}

to TArrayD ? 
(And for completeness similar functions
to the other TArrayXs) ?

I didn't test this function, though...

Or is there already a similar function ?


thanks,

André



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