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 period 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 generalized Bernstein polynomials in function BersteinPoly.
• 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 bases continuous at right boundary knot for
  consistency with spline bases of non-zero degrees.
• Changed the default value of argument intercept in function iSpline and
  cSpline to TRUE for a complete set of spline bases 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 piece-wise constant bases when
  knots = NULL.

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.