NEWS
FuzzyNumbers 0.4-7 (2021-11-15)
FuzzyNumbers 0.4-6 (2019-02-05)
- [BUGFIX] #15 'as.PiecewiseLinearFuzzyNumber' used to truncate the upper knots.
FuzzyNumbers 0.4-5 (2019-01-16)
- [BUGFIX] #14 'as.PiecewiseLinearFuzzyNumber' used to fail for some
TriangularFuzzyNumbers
- updated manual & package metadata
FuzzyNumbers 0.4-2 (2018-02-14)
- updated manual & package metadata
FuzzyNumbers 0.4-1 (2015-02-26)
- added possibility and necessity functions that represent comparison
operators <=,<,>,>= (with tests and description in vignette)
- added functions to determine minimum and maximum of two fuzzy numbers
(description in vignette)
- added operator ^ for calculation of integer power of
PiecewiseLinearFuzzyNumber
- added function arctan2 for calculation of atan2 with
PiecewiseLinearFuzzyNumber arguments
FuzzyNumbers 0.3-5 (2014-10-01)
- added proper import directives in NAMESPACE
- piecewiseLinearApproximation: method="ApproximateNearestEuclidean"
no longer accepted; use "NearestEuclidean" instead.
- package vignette now in the vignettes/ directory.
FuzzyNumbers 0.3-3 (2014-01-03)
- piecewiseLinearApproximation() now supports new method="SupportCorePreserving",
see Coroianu L., Gagolewski M., Grzegorzewski P., Adabitabar Firozja M.,
Houlari T., Piecewise Linear Approximation of Fuzzy Numbers Preserving
the Support and Core, 2014 (submitted for publication).
- piecewiseLinearApproximation() now does not fail on exceptions thrown
by integrate(); fallback=Newton-Cotes formula.
- Removed 'Suggests' dependency: testthat tests now available for developers
via the FuzzyNumbers github repository.
- Package manual has been corrected and extended.
- Package vignette is now only available
online at http://FuzzyNumbers.rexamine.com.
FuzzyNumbers 0.3-1 (2013-06-23)
- piecewiseLinearApproximation() - general case (any knot.n)
for method="NearestEuclidean" now available.
Thus, method="ApproximateNearestEuclidean" is now deprecated.
- New binary arithmetic operators, especially
for PiecewiseLinearFuzzyNumbers: +, -, *, /
- New method: fapply() - applies a function on a PLFN
using the extension principle
- New methods: as.character(); also used by show().
This function also allows to generate LaTeX code defining the FN
(toLaTeX arg thanks to Jan Caha).
- as.FuzzyNumber(), as.TriangularFuzzyNumber(), as.PowerFuzzyNumber(), and
as.PiecewiseLinearFuzzyNumber() are now S4 methods,
and can be called on objects of type numeric, as well as on
various FNs
- piecewiseLinearApproximation() and as.PiecewiseLinearFuzzyNumber()
argument 'knot.alpha' now defaults to equally distributed knots
(via given 'knot.n'). If 'knot.n' is missing, then it is guessed
from 'knot.alpha'.
- PiecewiseLinearFuzzyNumber() now accepts missing 'a1', 'a2', 'a3', 'a4',
and 'knot.left', 'knot.right' of length 'knot.n'+2. Moreover, if 'knot.n'
is not given, then it is guessed from length(knot.left).
If 'knot.alpha' is missing, then the knots will be equally distributed
on the interval [0,1].
- alphacut() now always returns a named two-column matrix.
evaluate() returns a named vector.
- New function: TriangularFuzzyNumber - returns a TrapezoidalFuzzyNumber.
- Function renamed: convert.side to convertSide, convert.alpha
to convertAlpha, approx.invert to approxInvert
- Added a call to setGeneric("plot", function(x, y, ...) ...
to avoid a warning on install
- The FuzzyNumbers Tutorial has been properly included
as the package's vignette
- DiscontinuousFuzzyNumber class has been marked as **EXPERIMENTAL**
in the manual
- Man pages extensively updated
- FuzzyNumbers devel repo moved to GitHub
FuzzyNumbers 0.2-1
- approx.invert(): a new function to find the numerical
inverse of a given side/alpha-cut generating function
(by default via Hermite monotonic spline interpolation)
- convert.side(), convert.alpha():
new functions to convert sides and alpha cuts
to side generating funs and alpha cut generators
- FuzzyNumber class validity check for lower, upper, left, right:
- checks whether each function is properly vectorized
and gives numeric results
- does not check for the number of formal arguments,
but just uses the first from the list
- Suggests 'testthat'
- Each object has been documented
- First CRAN release
FuzzyNumbers 0.1-1