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NEWS.md

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dbscan 1.1-3 (2018-11-12)

Bugfix

  • pointdensity was double counting the query point (reported by Marius Hofert).

dbscan 1.1-2 (2018-05-18)

New Features

  • OPTICS now calculates eps if it is omitted.

Bugfix

  • Example now only uses igraph conditionally since it is unavailable on Solaris (reported by B. Ripley).

dbscan 1.1-1 (2017-03-19)

Bugfix

  • Fixed problem with constant name on Solaris in ANN code (reported by B. Ripley).

dbscan 1.1-0 (2017-03-18)

New Features

  • HDBSCAN was added.
  • extractFOSC (optimal selection of clusters for HDBSCAN) was added.
  • GLOSH outlier score was added.
  • hullplot uses now filled polygons as the default.
  • hullplot now used PCA if the data has more than 2 dimensions.
  • Added NN superclass for kNN and frNN with plot and with adjacencylist().
  • Added shared nearest neighbor clustering as sNNclust() and sNN to calculate the number of shared nearest neighbors.
  • Added pointdensity function.
  • Unsorted kNN and frNN can now be sorted using sort().
  • kNN and frNN now also accept kNN and frNN objects, respectively. This can be used to create a new kNN (frNN) with a reduced k or eps.
  • Datasets added: DS3 and moon.

Interface Changes

  • Improved interface for dbscan() and optics(): ... it now passed on to frNN.
  • OPTICS clustering extraction methods are now called extractDBSCAN and extractXi.
  • kNN and frNN are now objects with a print function.
  • dbscan now also accepts a frNN object as input.
  • jpclust and sNNclust now return a list instead of just the cluster assignments.

dbscan 1.0-0 (2017-02-02)

New Features

  • The package has now a vignette.
  • Jarvis-Patrick clustering is now available as jpclust().
  • Improved interface for dbscan() and optics(): ... is now passed on to frNN.
  • OPTICS clustering extraction methods are now called extractDBSCAN and extractXi.
  • hullplot uses now filled polygons as the default.
  • hullplot now used PCA if the data has more than 2 dimensions.
  • kNN and frNN are now objects with a print function.
  • dbscan now also accepts a frNN object as input.

dbscan 0.9-8 (2016-08-05)

New Features

  • Added hullplot to plot a scatter plot with added convex cluster hulls.
  • OPTICS: added a predecessor correction step that is used by the ELKI implementation (Matt Piekenbrock).

Bugfixes

  • Fixed a memory problem in frNN (reported by Yilei He).

dbscan 0.9-7 (2016-04-14)

  • OPTICSXi is now implemented (thanks to Matt Piekenbrock).
  • DBSCAN now also accepts MinPts (with a capital M) to be compatible with the fpc version.
  • DBSCAN objects are now also of class db scan_fast to avoid clashes with fpc.
  • DBSCAN and OPTICS have now predict functions.
  • Added test for unhandled NAs.
  • Fixed LOF for more than k duplicate points (reported by Samneet Singh).

dbscan 0.9-6 (2015-12-14)

  • OPTICS: fixed second bug reported by Di Pang
  • all methods now also accept dist objects and have a search method "dist" which precomputes distances.

dbscan 0.9-5 (2015-10-04)

  • OPTICS: fixed bug with first observation reported by Di Pang
  • OPTICS: clusterings can now be extracted using optics_cut

dbscan 0.9-4 (2015-09-17)

  • added tests (testthat).
  • input data is now checked if it can safely be coerced into a numeric matrix (storage.mode double).
  • fixed self matches in kNN and frNN (now returns the first NN correctly).

dbscan 0.9-3 (2015-9-2)

  • Added weights to DBSCAN.

dbscan 0.9-2 (2015-08-11)

  • Added kNN interface.
  • Added frNN (fixed radius NN) interface.
  • Added LOF.
  • Added OPTICS.
  • All algorithms check now for interrupt (CTRL-C/Esc).
  • DBSCAN now returns a list instead of a numeric vector.

dbscan 0.9-1 (2015-07-21)

  • DBSCAN: Improved speed by avoiding repeated sorting of point ids.
  • Added linear NN search option.
  • Added fast calculation for kNN distance.
  • fpc and microbenchmark are now used conditionally in the examples.

dbscan 0.9-0 (2015-07-15)

  • initial release