THnSparseF are oversized

From: Will Morrison <wzmorrison_at_gmail.com>
Date: Mon, 23 Nov 2009 18:50:08 -0500

Hi rooters,
My THnSparseF's seem to be oversized. For example, a 4D THn with 32 bins in each dimension, and crr->GetNbins() = (const Long64_t)518332 has a size on my hard drive of about 8MB. Shouldn't it be closer to 2MB, since sizeof(float)=4, 4 bytes*518332 = 2MB . Here is the Dump output, since I don't want to send something this large out over the list:

Thanks!
Will Morrison
Boston University
Statistical Physics Group

crr->Dump()
==> Dumping object at: 0x0000000001af0860, name=hc, class=THnSparseT<TArrayF>

fNdimensions                  4                   number of dimensions
fChunkSize                    16384               number of entries
for each chunk
fFilledBins                   518332              number of filled bins
fAxes                         ->1af08a0           axes of the histogram
fAxes.*fCont                  ->1ae09b0           !Array contents
fAxes.fLowerBound             0                   Lower bound of the array
fAxes.fLast                   3                   Last element in
array containing an object
fAxes.fSorted                 false               true if collection
has been sorted
fAxes.fName                   ->1af08b0           name of the collection
fAxes.fName.*fData
fAxes.fSize                   16                  number of elements
in collection
fAxes.fUniqueID               0                   object unique identifier
fAxes.fBits                   0x03004000          bit field status word
fBinContent                   ->1af08d8           array of THnSparseArrayChunk
fBinContent.*fCont            ->1bcf030           !Array contents
fBinContent.fLowerBound       0                   Lower bound of the array
fBinContent.fLast             31                  Last element in
array containing an object
fBinContent.fSorted           false               true if collection
has been sorted
fBinContent.fName             ->1af08e8           name of the collection
fBinContent.fName.*fData
fBinContent.fSize             32                  number of elements
in collection
fBinContent.fUniqueID         0                   object unique identifier
fBinContent.fBits             0x03004000          bit field status word
fBins                         ->1af0910           filled bins
fBins.*fTable                 ->7f71bb912010
fBins.fSize                   889871
fBins.fTally                  518332
fBins.fUniqueID               0                   object unique identifier
fBins.fBits                   0x03000000          bit field status word
fBinsContinued                ->1af0930           filled bins for
non-unique hashes, containing pairs of (bin index 0, bin index 1)
fBinsContinued.*fTable        ->1a94240
fBinsContinued.fSize          101
fBinsContinued.fTally         0
fBinsContinued.fUniqueID      0                   object unique identifier
fBinsContinued.fBits          0x03000000          bit field status word
fEntries                      7.8804e+06          number of entries,
spread over chunks
fTsumw                        7.8804e+06          total sum of weights
fTsumw2                       7.8804e+06          total sum of weights
squared; -1 if no errors are calculated
fTsumwx                       ->1af0968           total sum of
weight*X for each dimension
fTsumwx.*fArray               0                   [fN] Array of fN doubles
fTsumwx.fN                    4                   Number of array elements
fTsumwx2                      ->1af0980           total sum of
weight*X*X for each dimension
fTsumwx2.*fArray              9.20048e+07         [fN] Array of fN doubles
fTsumwx2.fN                   4                   Number of array elements
*fCompactCoord                ->0                 ! compact coordinate
*fIntegral                    ->0                 ! array with bin weight sums
fIntegralStatus               0                   ! status of integral
fName                         ->1af0870           object identifier
fName.*fData                  hc
fTitle                        ->1af0880           object title
fTitle.*fData                 hc
fUniqueID                     0                   object unique identifier
fBits                         0x03000000          bit field status word

root [10] Received on Tue Nov 24 2009 - 00:50:18 CET