splines2 0.4.6
New features
- Added
update() methods to produce new spline basis
functions based on the given object with specified updates in terms of
degree and knots, etc.
Minor changes
- Appended a new class named
splines2 to the output
matrices to simplify some common S3 methods.
splines2 0.4.5
Minor changes
- Improved the computational efficiency of finding the knot intervals
for
x (by replacing the naive binary search implementation
with std::upper_bound and std::distance).
splines2 0.4.4
New features
- Added the
makepredictcall() methods for all available
spline basis functions to help model.frame.default() create
the right matrices when predicting from models with terms such as
bSpline(), etc. Thanks Zheyuan Li for suggesting this
feature.
- Added arguments
derivs and integal to
bSpline() for consistency with mSpline() and
bernsteinPoly(), etc.
Minor changes
- Made the internal checking procedure more strict to throw an error
if any internal knots are placed at or outside boundary: issue
5.
Bug fixes
- Fixed the
predict() method for cSpline
objects when scale = FALSE.
splines2 0.4.3
New features
- Enabled extended knot sequence that allows multiplicity of internal
knots for B-splines, M-splines, I-splines, and C-splines in the C++
interface.
- Added type conversion to
BernsteinPoly and
PeriodicMSpline objects to the C++ interface.
Minor changes
- Added testing examples for constructing spline basis functions via
the C++ interface.
splines2 0.4.2
New features
- Added
knots() methods to extract internal knots and
boundary knots from a given splines2 object.
Major changes
- Updated the generation of the knot sequence for periodic M-splines
following Piegl and Tiller (1997), which relaxed the previous
requirement that
length(knots) >= degree to
length(knots) >= degree - 1.
splines2 0.4.1
New features
- Added function
naturalSpline() providing implementation
of nonnegative natural cubic splines.
- Added argument
periodic to function
mSpline() for periodic M-splines.
- Added argument
integral to function
mSpline() for integrals of M-splines or periodic
M-splines.
- Added
deriv(), predict(), and
print() method for naturalSpline class
object.
Minor changes
- Updated the
deriv() method for mSpline
class object for periodic M-splines.
splines2 0.3.1
Minor changes
- Modified testing examples for CRAN tests on r-patched-solaris-x86
and r-oldrel-macos-x86_64.
splines2 0.3.0
New features
- Added function
bernsteinPoly() providing implementation
of generalized Bernstein polynomials.
- Added C++ interface that can be easily integrated with
Rcpp.
Major changes
- Changed most implementations from R to C++ with help of
Rcpp and RcppArmadillo to boost the
performance.
Minor changes
- Made piece-wise constant basis functions continuous at right
boundary knot for consistency with spline basis matrix of non-zero
degrees.
- Changed the default value of argument
intercept in
function iSpline() and cSpline() to
TRUE for a complete set of spline basis functions in
shape-restricted regression.
- Removed the corresponding M-spline basis from attributes of outputs
from
iSpline() and cSpline().
- Removed the corresponding B-spline basis from attributes of outputs
from
bSpline().
Bug fixes
- Fixed
deriv.mSpline() method for third derivatives of
scaled C-splines.
splines2 0.2.8
Bug fixes
- Fixed inconsistency of argument
df for piecewise
constant basis functions when knots = NULL.
Minor changes
- Rewrote testing suite for using the tinytest
package instead of testthat.
splines2 0.2.7
Minor changes
- Updated tests for R development version.
splines2 0.2.6
Minor changes
- Added checks for any internal knot incorrectly placed outside of the
boundary knots and added warnings for users’ reference.
splines2 0.2.5
Minor changes
- Added more tests and increased code coverage.
Bug fixes
- Fixed evaluation of derivatives of M-splines for a single value.
Thanks Ina Jazic for reporting the bug and providing possible fix.
- Fixed
deriv.cSpline() method for derivatives of order
greater than two when scale = TRUE.
splines2 0.2.4
New features
- Added function
dbs() generating derivative of given
order of B-splines. It is a similar function with
splines::splineDesign(). However, it provides a more
user-friendly interface and more consistent handling on
NA’s.
- Added
deriv() methods for derivatives of given order of
any existing splines2 object that can be generated
currently.
Major changes
- Added argument
derivs to function
mSpline() and iSpline() for derivatives.
- Changed all the classes of object generated for a better dispatching
on methods.
Minor changes
- Added tests for all major functions with the help of package
testthat.
Bug fixes
- Fixed the generation of splines without any internal knot.
splines2 0.2.3
Bug fixes
- Fixed one-piece constant basis for M-splines.
splines2 0.2.2
Bug fixes
- Fixed the NA’s handling in all the functions constructing spline
basis matrix.
splines2 0.2.1
New features
- Added function
bSpline() generating B-spline basis
allowing zero degree or piecewise constant basis based on function
bs() in the splines package.
- Introduced function
bSpline() to allow M-splines of
degree zero.
- Added function
cSpline() constructing convex spline
(C-spline) basis.
- Added
predict() methods for bSpline2
object and cSpline object generated by
bSpline() and cSpline(), respectively.
- Added
print() methods for all splines2
objects developed so far.
Major changes
- Improved the function
iSpline() to construct I-spline
basis directly from B-spline basis instead of M-spline basis.
Minor changes
- Updated all CRAN URL to a canonical form suggested.
splines2 0.1.0
New features
- The first version of splines2 providing functions
constructing M-spline, I-spline, and integral of B-spline basis.