[Keplerweka-developer] Easter release

[Peter R. <fra...@wa...>]

Hi there

It has been quiet lately, I know. But the reason for this wasn’t that
nothing happened on the coding front, I was way too busy at work.
Anyhow, I’ve just uploaded a new release: 20090409
https://sourceforge.net/project/showfiles.php?group_id=256842&package_id=314839&release_id=674535

Since there were quite a few changes since the release in December
last year, I’ll just briefly go over them:

Actors
=====
* Rename
   Allows you to modify the relation name of a weka.core.Instances
   or weka.core.Instance object

* Evaluators (CV, random split, testset)
  These evaluators are now more robust, i.e., they don’t try to
  perform an evaluation if there isn’t sufficient data.

* EvaluationValuePicker
  Lets you pick a particular statistic, e.g., Percent correct (= accuracy),
  from a provided weka.classifiers.Evaluation object. Very handy if you
  want to plot this value over time.

* SequencePlotter
  I’ve upgraded Kepler’s SequencePlotter in order to be able to automatically
  update the plot after each arriving value. Normally, this is not encouraged,
  since the update is computationally rather expensive. But in the case of
  plotting statistics of a classifier evaluation, evaluating the
classifier is way
  more expensive.

* Classifying/Clustering
  These actors now allow you to specify a serialized model as well, no need
  to make use of the ModelReader actor. I added this property, since I
  needed to classify incoming weka.core.Instance objects with a serialized
  model. Triggering the read of a large SMO model from disk each time an
  Instance arrived wasn’t feasible, hence this optimization.

* Filter
  The Filter actor now allows you to stream results through it. It is no longer
  necessary to first train it with a batch of data. Caution: In case of batch
  filters, the first Instance object arriving is used to initialized
the filter. This
  is not desired for all filters (e.g., Normalized or Standardize).

* ObjectToString
  A actor that allows you to inspect objects. You can use property paths or
  read methods to obtain information of an object’s internal state. Very
  handy for debugging.

* OutputLogger
  If you want to capture the output on the command-line (stdout and
  stderr), then use this actor to redirect the output into a log file.

Other stuff
=========
* added scripts for updating the icons (update_icons.sh) and ontologies
  (update_ontologies.sh) - useful for developers

Happy Easter!! :-)

Cheers, Peter

PS
You can find this information also on the KeplerWeka blog:
https://apps.sourceforge.net/wordpress/keplerweka/2009/04/09/easter-release/
-- 
Peter Reutemann, Dept. of Computer Science, University of Waikato, NZ
http://www.cs.waikato.ac.nz/~fracpete/           Ph. +64 (7) 858-5174