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

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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: 3492 byte(s)
Copied from: branches/dev/tmva/src/PDEFoamKernelTrivial.cxx revision 38471
Diff to previous 37683

copying tmva/dev to trunk

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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/PDEFoamKernelTrivial.cxx
File length: 3492 byte(s)
Copied from: branches/dev/tmvaValidation/PDEFoam3/src/PDEFoamKernelTrivial.cxx revision 37682
Diff to previous 37678

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 37678 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Tue Dec 21 16:21:53 2010 UTC (4 years, 1 month ago) by avoigt
Original Path: branches/dev/tmvaValidation/PDEFoam3/src/PDEFoamKernelTrivial.cxx
File length: 3492 byte(s)
Diff to previous 37677

Implement copy constructors of all PDEFoam kernels and
density estimators.  Note that the copy constructors of
the density estimators rely on the copy constructor of
TMVA::BinarySearchTree, which is not yet implemented.

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Revision 37677 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Tue Dec 21 14:07:25 2010 UTC (4 years, 1 month ago) by avoigt
Original Path: branches/dev/tmvaValidation/PDEFoam3/src/PDEFoamKernelTrivial.cxx
File length: 3278 byte(s)
Diff to previous 37624

add missig Subversion identification line to all files with name
PDEFoam*

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Revision 37624 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Fri Dec 17 13:25:18 2010 UTC (4 years, 1 month ago) by avoigt
Original Path: branches/dev/tmvaValidation/PDEFoam3/src/PDEFoamKernelTrivial.cxx
File length: 3211 byte(s)
Diff to previous 37580

apply ROOT coding convention: call abstract PDEFoam kernel
class 'PDEFoamKernelBase'

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Revision 37580 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Mon Dec 13 19:06:30 2010 UTC (4 years, 1 month ago) by avoigt
Original Path: branches/dev/tmvaValidation/PDEFoam3/src/PDEFoamKernelTrivial.cxx
File length: 3207 byte(s)
Diff to previous 37463

update the copyright note

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Revision 37463 - (view) (download) (as text) (annotate) - [select for diffs]
Added Thu Dec 9 22:39:57 2010 UTC (4 years, 1 month ago) by avoigt
Original Path: branches/dev/tmvaValidation/PDEFoam3/src/PDEFoamKernelTrivial.cxx
File length: 3207 byte(s)

Make PDEFoamKernel an abstract class (interface class) and
derive PDEFoamKernelTrivial from it.