Log of /trunk/tmva/src/PDEFoamDiscriminant.cxx

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Revision 44110 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Fri May 4 08:34:05 2012 UTC (2 years, 8 months ago) by evt
File length: 10879 byte(s)
Diff to previous 38475

copy from tmva dev, changes 42527To44009

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Revision 38475 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Thu Mar 17 10:46:00 2011 UTC (3 years, 10 months ago) by evt
File length: 10869 byte(s)
Copied from: branches/dev/tmva/src/PDEFoamDiscriminant.cxx revision 38471
Diff to previous 37695

copying tmva/dev to trunk

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Revision 37695 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Sat Jan 1 22:32:10 2011 UTC (4 years ago) by avoigt
Original Path: branches/dev/tmva/src/PDEFoamDiscriminant.cxx
File length: 10869 byte(s)
Diff to previous 37683

Extend and correct the comments for some PDEFoam* classes.

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Revision 37683 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Wed Dec 22 09:03:52 2010 UTC (4 years, 1 month ago) by avoigt
Original Path: branches/dev/tmva/src/PDEFoamDiscriminant.cxx
File length: 10436 byte(s)
Copied from: branches/dev/tmvaValidation/PDEFoam2/src/PDEFoamDiscriminant.cxx revision 37009
Diff to previous 37009

Merge complete branch  dev/tmvaValidation/PDEFoam3  into  dev/tmva


Release notes:
==============

New PDEFoam structure:
----------------------

The different PDEFoam variants are now subclasses of the class
TMVA::PDEFoam.  These variants are:

  - PDEFoamEvent        (stores the number of events)
  - PDEFoamDiscriminant (stores the discriminant)
  - PDEFoamTarget       (stores a single target)
  - PDEFoamMultiTarget  (variation of PDEFoamEvent)
  - PDEFoamDecisionTree (decision tree-like cell splitting)

Per default PDEFoam stores in the cells the number of events (event
weights) and therefore acts as an event density estimator.  However,
the above listed derived classes override this behaviour to implement
certain PDEFoam variations.

The different PDEFoam's density estimators are now derived classes of
the abstract interface class TMVA::PDEFoamDensityBase.  These density
estimators are:

  - PDEFoamEventDensity        (estimates the event density)
  - PDEFoamDiscriminantDensity (estimates the discriminant density)
  - PDEFoamTargetDensity       (estimates the target density)
  - PDEFoamDecisionTreeDensity (estimates decision tree separation type)

The various PDEFoam kernels are now separate from the PDEFoam class.
The abstract kernel interface is provided by the class
TMVA::PDEFoamKernelBase.  The concrete classes PDEFoamKernelTrivial,
PDEFoamKernelLinN and PDEFoamKernelGauss implement specific kernel
estimators.

Extended PDEFoam functionality:
-------------------------------

  * Multiclass classification via training of one discriminator foam
    for each variable.

  * The cell tree can now be plotted from the macro test/PlotFoams.C
    This makes it easyer to compare the PDEFoam structure to a
    decision tree etc.

  * Variable importance ranking by counting the number of cuts made in
    the diverse dimensions.  The variable, for which the most cuts
    were done is ranked highest.

Fixed bugs:
-----------

  * The size of the sampling box in each dimension was 2*VolFrac times
    the foam size in this dimension.  This was contrast to the
    intention and the documentation in the UserGuide.  This is now
    corrected: The size of the sampling box in each dimension is now
    VolFrac times the foam size in this dimension.  This implies that
    the VolFrac default value must be changed from 0.0333 to 0.0666 to
    lead the same results.

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Revision 37009 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Sat Nov 27 14:27:39 2010 UTC (4 years, 1 month ago) by avoigt
Original Path: branches/dev/tmvaValidation/PDEFoam2/src/PDEFoamDiscriminant.cxx
File length: 6188 byte(s)
Diff to previous 37008

add comments and remove unused includes

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Revision 37008 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Sat Nov 27 13:48:28 2010 UTC (4 years, 1 month ago) by avoigt
Original Path: branches/dev/tmvaValidation/PDEFoam2/src/PDEFoamDiscriminant.cxx
File length: 7227 byte(s)
Diff to previous 37007

remove fFillFoamWithOrigWeights from PDEFoam, because
this information should be specified from outside

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Revision 37007 - (view) (download) (as text) (annotate) - [select for diffs]
Added Sat Nov 27 13:32:51 2010 UTC (4 years, 1 month ago) by avoigt
Original Path: branches/dev/tmvaValidation/PDEFoam2/src/PDEFoamDiscriminant.cxx
File length: 7309 byte(s)

Make PDEFoam an abstract class and and make the several
PDEFoam algorithms concrete subclasses of PDEFoam.

It was checked, that all algorithms work as expected.
However the kernels were removed and must be reimpleneted.