December 12, 2010

• version 4.1.12
• many minor bugs are solved

June 25, 2010

• version 4.1.10
• option for density preserving data splitting added to crossval, thanks to Budka and Gabrys
• new classifier drbmc: Discriminative Restricted Boltzmann Machine, thanks to Laurens van der Maaten
• small changes in traincc and wvotec

June 1, 2010

• version 4.1.9
• bug in wvotec fixed
• libsvc and nulibsvc added (expects libsvm package)

May 3, 2010

• bug in indexing datasets fixed

April 2010

• vpc, voting perceprton classifier implemented by Laurens van der Maaten.
• prarff, import of WEKA ARFF files available.

March 2010

• communication with users improved by the command prtools, generating a web interface.

February 2010

• prwaitbar usage simplified by implementation of prwaitbarinit, prwaitbaronce and prwaitbarnext

July 2009

• featselv implemented

March 2009

• dcsc (dynamic classifier selection) and modelsc added as combining classifiers.

January 2009

• naivebcc and mlrc: new trainable combiners implemented by Chunxia Zhang.
• loso, leave-one-set out crossvalidation implemented.
• testc now accepts missing classes in case of undefined (empty) priors.
• im_patch for generation of image patches implemented in datafiles
• band2obj and bandsel for handling image bands implemented in datafiles
• 1-d images (time signals) are now accepted for datafiles, patches and bands

August 2008

• im_dbr constructed: GUI to illustrate PRTools usage for image database retrieval.

July 2008

• prwaitbar implemented and included in many routines.
• ident field in dataset reorganised to avoid overhead.
• createdatafile implemented to support saving partially constructed datafiles.

June 2008

• adaboostc added

August 2007

• A set of regression routines added by David Tax: linearr, ridger, lassor, svmr, ksmoothr, knnr, pinvr, plsr, plsm, testr, rsquared

June 2007

• performance measures for testc extended.
• automatic parameter optimisation implemented for many routines by regoptc.
• rbsvc, automatic radial basis support  vector classifier, implemented.
• rsscc, random subspace combining classifier implemented.

May 2007

• naivebc extended: allows now also densitites estimated by parzenm and gaussm.
• soft output nmc improved: now based and spherical Gaussian densities.
• many image preprocessing routines implemented for datafiles, e.g. im_bdilation, im_gaussf,im_minf,im_skel, im_berosion, im_gray,im_moments, im_skel_meas, im_box,im_harris,im_norm,im_stat, im_bpropagation, im_hist_equalize, im_stretch, im_center, im_invert, im_profile, im_threshold, im_label, im_resize, im_unif, im_fft,im_maxf, im_rotate, im_fill_norm, im_mean, im_scale, im_gauss, im_measure, im_select_blob.

April 2007

·  normal_map (used in ldc,qdc,udc) now stores inverted covariances: slower training, faster execution.

·  gaussm and mogc improved: increased stability by adding noise, more trials, better regularisation.

March 2007

• Datafiles ready for usuage. Consequence is that as feature sizes of datafiles cannot be set appropriately, also mappings should allow for unset feature size (featsize = 0). Still much debugging to be done.

December 2006

• PRMEMORY, PRTRACE, GRIDSIZE, etc are made persistent instead of global
• plotr renamed into plote.
• general kernel option implemented for svc and nusvc

November 2006

• testauc (area under the curve) added.
• testc upgraded.

September 2006

• implementation of the multiple labeling, see multi-labeling.
• structure implementation for user and ident field of dataset.

March 2006

• intial implementation of the datafile class.

October 2005

• combining superfluous prwarning calls.
• bhatm, Bhattacharryya feature reduction implemented

April 2005

• labcmp added, useful for comparing label sets.

January 2005

• change of policy for prwarning levels: by default just print level 1 warnings.
• upgrade warning level for use of class frequencies in case of empty priors.

December 2004

• parzendc, parzen_map, nmc, allowing soft labels
• plotr (later plote), allow cells of error structures

October 2004

• nusvc_nu added

September 2004

• gaussm and emclust: get right number of components
• gaussm and emclust: improved soft label handling
• plotr (later plote): mulitple error curves implemented
• scalem, variance option corrected

August 2004

• output of confmat and testc upgraded by disperror.
• proxm extended.

June 2004

• fdsc, feature based dissimilarity space classifier implemented.

May 2004

• ploto, one-dimensional plot of features, added.
• immoments, conversion of object images to moments, added.
• crossvalidation in feature selection routines implemented.

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