NEWS file for the basefun package

Changes in Version 1.2-6 (2026-03-06)

• Use ‘REFERENCES.bib’.

Changes in Version 1.2-5 (2025-10-03)

• Fix bug triggered by new fun argument in Bernstein_basis.

Changes in Version 1.2-4 (2025-09-23)

• Allow prior transformations more general than log in Bernstein_basis via its new fun argument.

• Fix problem when computing the second derivatives of Bernstein polynomials after log-transformation.

Changes in Version 1.2-3 (2025-05-09)

• rep to rep_len.

Changes in Version 1.2-2 (2025-01-29)

• Switch from coneproj to quadprog in ?Bernstein_basis.

Changes in Version 1.2-1 (2025-01-17)

• Allow to keep unused levels in as.basis.formula.

Changes in Version 1.2-0 (2024-05-21)

• New cyclic_basis() for modelling seasonal effects.

Changes in Version 1.1-4 (2023-05-16)

• Bernstein_basis(..., ui = c("increasing", "zerointegral") came with incorrect constraint matrix.

Changes in Version 1.1-3 (2022-05-25)

• Bernstein_basis(..., ui = "zerointegral") came with incorrect constraint matrix.

Changes in Version 1.1-2 (2022-01-14)

• Allow coefficients in matrix form.

Changes in Version 1.1-1 (2021-11-12)

• Add convexity and concavity constraints to polynomials in Bernstein form.

• Add toy example demonstrating constrainted curve estimation to ?Bernstein_basis.

Changes in Version 1.1-0 (2021-03-09)

• More infrastructure for as.basis to return a Matrix object for ordered factors.

Changes in Version 1.0-7 (2020-02-13)

• Update citation info.

Changes in Version 1.0-6 (2019-10-05)

• Change name of parameter in intercept\_basis to (_Intercept_); this helps to detect intercepts originating from other calls to model.matrix..

Changes in Version 1.0-5 (2019-06-20)

• Make sure bounds[1] is positive if log_first = TRUE.

• Correct behaviour outside support when log_first = TRUE.

Changes in Version 1.0-4 (2019-02-25)

• model.matrix has constrasts attribute where appropriate.

Changes in Version 1.0-3 (2019-01-16)

• Bernstein(log()) is possible with new log_first argument.

• Fix > length 1 issues.

Changes in Version 1.0-2 (2018-09-17)

• Constrain Bernstein to zero second derivative at the support when linear extrapolation shall be used. This avoids ugly bumps in the corresponding densities in mlt.

Changes in Version 1.0-1 (2018-03-27)

• Replace rBind by rbind as requested by MM.

Changes in Version 1.0-0 (2018-03-07)

• A paper describing version 1.0-0 of the mlt, basefun, and variables packages was accepted for publication in the Journal of Statistical Software 2018-03-05.

• Documentation updates.

Changes in Version 0.0-40 (2018-02-23)

• nparm sometimes generated data with sanitised variable names, we don't want this to happen.

• Allow positive increasing Bernstein polynomials.

Changes in Version 0.0-39 (2017-12-18)

• Add intercept_basis, ie an intercept only model matrix.

Changes in Version 0.0-38 (2017-05-15)

• model.matrix.cbind_bases can now deal with lists as newdata argument (given appropriate dimensions in dim).

Changes in Version 0.0-37 (2017-04-04)

• Deal with integer variables when sumconstr = TRUE.

• Remove unnecessary warning when sumconstr = TRUE and negative = TRUE.

Changes in Version 0.0-36 (2017-03-01)

• Register C routines.

Changes in Version 0.0-35 (2017-02-14)

• Fix bug in predict when newdata was a data frame.

Changes in Version 0.0-34 (2016-12-14)

• Fix bug in predict when newdata was a list. The ordering of the resulting array may have been incorrect under rare circumstances.

Changes in Version 0.0-33 (2016-09-12)

• Approximate Bernstein polynomial f outside its support (l, u) by a linear function f(u + x) = f(u) + f'(u) * (u - x), now also for deriv > 0 (maxderiv argument in model.matrix.Bernstein_basis. The default (linear extrapolation for deriv = 0 only) did not change.

Changes in Version 0.0-32 (2016-05-31)

• Contraints in log_basis were potentially wrong.

Changes in Version 0.0-31 (2016-04-25)

• log_basis has better checks for positivity of the variable to be log-transformed.

Changes in Version 0.0-30 (2016-02-19)

• The basefun package was first published on CRAN.