there is a bug in GCC 4.3.0 that makes roottest/root/hist/operator/runsparse.C fail in the error calculation part. Funny enough it fails because TH3 messes up its errors (not THnSparse  :-) .

The problem stems from TH1::GetBinError():
   if (fSumw2.fN) return TMath::Sqrt(fSumw2.fArray[bin]);
does not get evaluated properly - it has _horribly_ wrong values, e.g.
  -5063: 0.42
  +5063: 0.648074
("-" is GCC 3.4.6, "+" is GCC 4.3.0)
after scaling a bin with a single entry by 0.42. So this is a real issue. It's possibly connected to the new math compiler intrinsics + pushing their results onto the stack.

Attached patch fixes this, by introducing a temporary.

      Double_t err2 = fSumw2.fArray[bin];
      return TMath::Sqrt(err2);

The patch also fixes THnSparse::Scale() - it was also scaling the entries.


git-svn-id: http://root.cern.ch/svn/root/trunk@23533 27541ba8-7e3a-0410-8455-c3a389f83636

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git-svn-id: http://root.cern.ch/svn/root/trunk@23413 27541ba8-7e3a-0410-8455-c3a389f83636

Implement Projection() for non-uniform bins, too. Simplify and shorten the code considerably (combine projection targets TH1,2,3, THnSparse). 
Also fixes a bug with the projection target's title for THnSparse->THnSparse projections.


git-svn-id: http://root.cern.ch/svn/root/trunk@23375 27541ba8-7e3a-0410-8455-c3a389f83636

git-svn-id: http://root.cern.ch/svn/root/trunk@23365 27541ba8-7e3a-0410-8455-c3a389f83636

git-svn-id: http://root.cern.ch/svn/root/trunk@23290 27541ba8-7e3a-0410-8455-c3a389f83636

git-svn-id: http://root.cern.ch/svn/root/trunk@23286 27541ba8-7e3a-0410-8455-c3a389f83636

git-svn-id: http://root.cern.ch/svn/root/trunk@23275 27541ba8-7e3a-0410-8455-c3a389f83636

git-svn-id: http://root.cern.ch/svn/root/trunk@23143 27541ba8-7e3a-0410-8455-c3a389f83636

Implement THnSparse::RebinnedAdd(hnsparse, c), which adds hnsparse*c to this, 
ignoring different bin sizes. 
Can be used to rebin a THnSparse: create a new THnSparse with the binning you want, 
and add the THnSparse with the old binning to it using RebinnedAdd(old).
Also fixes an issue with Rebin() accessing an out-of-bound bin.


git-svn-id: http://root.cern.ch/svn/root/trunk@23127 27541ba8-7e3a-0410-8455-c3a389f83636

git-svn-id: http://root.cern.ch/svn/root/trunk@23092 27541ba8-7e3a-0410-8455-c3a389f83636

        TTree, TH1, TEventList, TEntryList, TGraph2D
(and hence their derived classes).

The instances of those classes are now added automatically 
to the current directory only when Constructe'd with arguments or Clone'd
and to the directory they are read from when their are stored
directly in a TKey. [Note: the default constructor never adds
the object to the current directory]

The directory auto add can still be disabled for instance
of TH1 and TGraph2D by setting TH1::AddDirectory.

Additionally one can disable the directory auto add for
a specific class by doing:

    TClass::GetClass("myclass")->SetDirectoryAutoAdd(0)

However you might want to also be able to restore the
behavior in which case you ought to do:

    TClass *cl = TClass::GetClass("myclass");
    ROOT::DirAutoAdd_t func = cl->GetDirectoryAutoAdd();
    cl->SetDirectoryAutoAdd(0);

TROOT::ReadingObject is marked as deprecated.. It is still
set (as it was) but is no longer used by the above mention
classes.

NOTE:  One side effect of this change, is that instnace 
of TTree, TH1, TEventList, TEntryList, TGraph2D that are
retrieved from a TMessage (i.e. from a socket) no longer
auto register themselves to the current ROOT directory.

Add a new optional parameter to TDirectory::Append: 'replace'
If replace is true (the default is false), the Append will
first remove from the directory any existing object and
print the message:

   Replacing existing OldClass: thename (Potential memory leak).

Add a new option parameter to TDirectory::CloneObject: 'autoadd'
If autoadd is true (the default), CloneObject will call the
object 'DirectoryAutoAdd' function (if any)

In TDirectory::CloneObject add support for multiple inheritance
from TObject where TObject is not the left most base class.

Fix memory leak in TGraph2D::operator= (and add TGraph2D::Clear)

Cleanup some documentation


git-svn-id: http://root.cern.ch/svn/root/trunk@22992 27541ba8-7e3a-0410-8455-c3a389f83636

   // Smooth bin contents of this 2-d histogram using kernel algorithms
   // similar to the ones used in the raster graphics community.
   // Bin contents in the active range are replaced by their smooth values.
   // If Errors are defined via Sumw2, they are scaled.
   // 3 kernels are proposed k5a, k5b and k3a.
   // k5a and k5b act on 5x5 cells (i-2,i-1,i,i+1,i+2, and same for j)
   // k5b is a bit more stronger in smoothing
   // k3a acts only on 3x3 cells (i-1,i,i+1, and same for j).
   // By default the kernel "k5a" is used. You can select the kernels "k5b" or "k3a"
   // via the option argument.
   // If TAxis::SetRange has been called on the x or/and y axis, only the bins
   // in the specified range are smoothed.
   // In the current implementation if the first argument is not used (default value=1).
   //
   // implementation by David McKee (dmckee@bama.ua.edu). Extended by Rene Brun


git-svn-id: http://root.cern.ch/svn/root/trunk@22986 27541ba8-7e3a-0410-8455-c3a389f83636

TDirectory::Append.  This allows more 'hiding' of the internal list as
well as simplifying code (now) using Append/Remove.


git-svn-id: http://root.cern.ch/svn/root/trunk@22972 27541ba8-7e3a-0410-8455-c3a389f83636

see : http://root.cern.ch/phpBB2/viewtopic.php?t=5262

void TH2::Smooth(Int_t , Option_t *)
   // Smooth bin contents of this histogram.
   // Bin contents are replaced by their smooth values.
   // Errors (if any) are not modified.
   // implementation by David McKee (dmckee@bama.ua.edu)

Also change in A BACKWARD INCOMPATIBLE WAY the signature of TH1::Smooth
to be the same as TH2::Smooth.


git-svn-id: http://root.cern.ch/svn/root/trunk@22965 27541ba8-7e3a-0410-8455-c3a389f83636

in the final TH2C,S,I,F,D constructors


git-svn-id: http://root.cern.ch/svn/root/trunk@22912 27541ba8-7e3a-0410-8455-c3a389f83636

   mathcore
   mathmore
   fftw
   foam
   fumili
   genvector
   matrix
   minuit
   minuit2
   mlp
   physics
   smatrix
   splot
   unuran
   quadp


git-svn-id: http://root.cern.ch/svn/root/trunk@22885 27541ba8-7e3a-0410-8455-c3a389f83636

( fix for bug https://savannah.cern.ch/bugs/index.php?34936 )


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git-svn-id: http://root.cern.ch/svn/root/trunk@22822 27541ba8-7e3a-0410-8455-c3a389f83636

- remove TMathImp.h file to fix documentaiton problem
- change name for class GaussIntegratorOneDim to GaussIntegrator


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- fix warning observed on the Windows nightly (avid generating the dictionary for fit method functions for all platforms, it is not needed) 
- add implementation of  Minimizer interface using TMinuit and the linear fitter
- add method SetBasisFunctions in TLinearFitter class to set the linear terms  
- add some optimization of wrapped functions and improve doc


git-svn-id: http://root.cern.ch/svn/root/trunk@22564 27541ba8-7e3a-0410-8455-c3a389f83636

-  warning: suggest a space before ; or explicit braces around empty body
   in for statement


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and xrootd.


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git-svn-id: http://root.cern.ch/svn/root/trunk@22519 27541ba8-7e3a-0410-8455-c3a389f83636

Changes to support the gcc -weffc++ compiler option.


git-svn-id: http://root.cern.ch/svn/root/trunk@22428 27541ba8-7e3a-0410-8455-c3a389f83636

ROOT can not be compiled with gcc-4.3.
Some ROOT source files doesn't contain required #include directives,
for example, they use strlen(), but #include <string.h> is missed or
malloc() is used and #include <stdlib.h> is missed. 

Earlier versions of gcc allowed some headers to be included implicitly,
but issued a warning (-Wimplicit-function-declaration). Newer one,
gcc-4.3 denies such silly behaviour: all required headers must be explicitly
included. 

Attached patch fixes this. Also it fixes another issue, which disallows
ROOT to compile under gcc-4.3: C functions don't belong to namespace std,
so expressions like std::memcpy() are no longer valid and plain memcpy()
should be used instead.


git-svn-id: http://root.cern.ch/svn/root/trunk@22419 27541ba8-7e3a-0410-8455-c3a389f83636

git-svn-id: http://root.cern.ch/svn/root/trunk@22403 27541ba8-7e3a-0410-8455-c3a389f83636

from Axel: apply patch to fixe two memleaks: an enormous one reported for THnSparse and a tiny one for TH3::ProjectionZ


git-svn-id: http://root.cern.ch/svn/root/trunk@22295 27541ba8-7e3a-0410-8455-c3a389f83636