CEC v0.12.0
New features
cec() now accepts an optional weights
argument: a numeric vector of non-negative values, one per observation.
Cluster means, covariances, and the returned $probability
field are all weight-aware. When weights = NULL (default),
behaviour is identical to previous versions.
Breaking changes
- When
weights is non-uniform, $probability
now reports the weighted mixing proportion W_k / W_total
rather than the observation-count fraction n_k / m.
- When
weights is non-uniform, card.min is
now interpreted as a minimum weight sum rather than a minimum
observation count.
Minor improvements and fixes
- Fixed a crash with non-uniform
weights: a cluster with
fewer observations than dimensions could pass the weight-sum-based
card.min check and produce a singular covariance. Cluster
removal now also enforces a minimum observation count.
- Fixed a crash in
cec(..., keep.removed = TRUE) whenever
a cluster was actually removed during clustering
(Error in matrix(NA, 1, ncol(center)) : non-numeric matrix extent).
plot.cec() now warns and skips a single cluster’s
covariance ellipse if it cannot be drawn (e.g. a degenerate covariance),
instead of failing the whole plot. Previously the surrounding
tryCatch had no error handler and so provided
no protection.- Error messages for internal clustering failures now include the
underlying cause instead of a generic message.
- Fixed a C++20 compiler warning (ambiguous reversed comparison
operators) flagged by CRAN’s macOS checks.
CEC v0.11.3
New features
Minor improvements and
fixes
CEC v0.11.2
New features
Minor improvements and
fixes
- Fixing CRAN NO_REMAP error with R > 4.5.0.
CEC v0.11.1
New features
Minor improvements and
fixes
- Fixing new CRAN check errors.
CEC v0.11.0
New features
- New maintainer.
- New logo.
Minor improvements and
fixes
- Refactoring/reorganizing R code for easier maintenance.
- Improving of documentation.
- Moving to GitHub actions for CI instead of Travis.
CEC v0.10.3
New features
Minor improvements and
fixes
- Fixing gcc-11 issues.
- Fixing other CRAN issues.
CEC v0.10.2
New features
- Adding fixed mean model.
- Adding data set: threeGaussians.
Minor improvements and
fixes
- Fixing compilation issues on some platforms.
CEC v0.10.1
New features
- Rewriting all C the code in C++11.
- Adding split method.
- Adding threads.
Minor improvements and
fixes
CEC v0.9.4
New features
Minor improvements and
fixes
- Adding README.md.
- Lots of refactoring.
- Small fixes.
CEC v0.9.3
New features
- Changing the way initial centers vector is handled: for each start,
length(centers) clusterings are performed.
- Adding two datasets: fourGaussians and mixShapes.
Minor improvements and
fixes
- Giving up support of -1 iterations (fixing memcheck problems).
CEC v0.9.2
New features
Minor improvements and
fixes
- Checking input data for NA values (session crushing).
- Changing ‘ZERO_EPSILON’ to ‘1.0e-32’.
- Lots of refactoring.
CEC v0.9.1
Initial Release.