NEWS.md
Release following the updates of vinecopulib to 0.6.2, see https://github.com/vinecopulib/vinecopulib/releases. The most relevant changes are summarized below.
improved documentation (discrete and missing dat, Rosenblatt transforms)
better parallelization when there is a small number of edges (#555)
Release following the updates of vinecopulib to 0.6.1, see https://github.com/vinecopulib/vinecopulib/releases. The most relevant changes are summarized below.
Maintenance release following the changes to all.equal() in R 4.1.x.
Release following the updates of vinecopulib to 0.5.5, see https://github.com/vinecopulib/vinecopulib/releases. The most relevant changes are summarized below.
Release following the updates of vinecopulib to 0.5.4, see https://github.com/vinecopulib/vinecopulib/releases. The most relevant changes are summarized below.
fix uninitialized number of parameters for TLL family
fix Kendall’s tau of Frank copula for par <= 3
fix dvinecop() when discrete variables are present (#222)
Release following the updates of vinecopulib to 0.5.3, see https://github.com/vinecopulib/vinecopulib/releases. The most relevant changes are summarized below.
catch na in ktau_to_par (#214)
make Bicop/Vinecop objects indepent of copied-from-objects
enforce parameters bounds in tau_to_parameters for Archimedean families
Release following the updates of vinecopulib to 0.5.2, see https://github.com/vinecopulib/vinecopulib/releases. The most relevant changes are summarized below.
NEW FEATURES
single-integer constructors for dvine_structure()/cvine_structure(). (#203)
add var_names = "hide" option in plot.vinecop_dist(). (#203)
add function plot.rvine_matrix(). (#203)
BUG FIXES
fix bug for (negative) tau to parameter conversion for Frank family. (#207)
fix rare error rvine_structure_sim()/rvine_matrix_sim()
safeguard "tll" family against comonotonic data.
stabilize archimedean h-functions near independence.
Release following the updates of vinecopulib to 0.5.1, see https://github.com/vinecopulib/vinecopulib/releases.
BUG FIX
Release following the updates of vinecopulib to 0.5.0, see https://github.com/vinecopulib/vinecopulib/releases. The most relevant changes are summarized below.
NEW FEATURES
modelling discrete variables with bivariate or vine copulas. (#195)
selection of partially specified R-vine structures. (#195)
convenience classes dvine_structure()/cvine_structure() for D- and C-vine structures. (#195)
new criterion for tree selection: "joe" corresponds to -log(1-r^2), where r is the pairwise partial correlation. (#195)
random sampling of R-vine structures. (#197)
API BREAK
var_types argument for discrete models has been placed early in bicop()/vinecop() due to its importance. This might break old code calling these functions with unnamed arguments.BUG FIXES AND OTHER IMPROVEMENTS
Release following the updates of vinecopulib to 0.3.2, see https://github.com/vinecopulib/vinecopulib/releases. The most relevant changes are summarized below.
NEW FEATURES
improved extensibility for packages including on the C++-headers of vinecopulib (#178)
new EDA function pairs_copula_data() (#181).
BUG FIXES
ensure that input and output type of pseudo_obs() match (#182).
fix printing of "tll" family in `summary.vinecop() (#183).
Release following the updates of vinecopulib to 0.3.1, see https://github.com/vinecopulib/vinecopulib/releases. The most relevant changes are summarized below.
NEW FEATURES
import vinecopulib 0.3.1 (#171)
warning message for wrong family in itau method (#169)
refactoring for enhanced extensibility of the class Vinecop (vinecopulib #407)
simplify algorithms by reversing definition of natural order (vinecopulib #387)
improve selection of truncation level (vinecopulib #373)
add truncate methods for TriangularArray, RVineStructure and Vinecop (vinecopulib #372)
BUG FIXES
Release following the updates of vinecopulib to 0.3.0, see https://github.com/vinecopulib/vinecopulib/releases. The most relevant changes are summarized below.
NEW FEATURES
new generic truncate_model() to truncated vine structures and models (#144).
new functions rosenblatt() and inverse_rosenblatt() for computing the (inverse) Rosenblatt transformation (#142).
faster algorithms for nonparametric copulas based on bilinear interpolation.
refactor vine structures and related algorithms with triangular arrays to improve efficiency of truncated models (#136).
new classes rvine_structure and rvine_matrix for storing the vine structure including as_- and is.-generics (#136).
allow for generating quasi-random numbers (#126).
improved parallelization: faster of fitting vine copula models and parallelized versions of many algorithms including pdf, cdf and simulation (#339, #363).
allow weights for observations (#118).
faster compilation using only a single wrapper file (#124).
improved print and summary generics (#131).
BUG FIXES
fix cdf of StudentBicop
improved numerical stability.
fix gcc-8 warning.
fix missing variable names for class vine.
Release following the updates of vinecopulib to 0.2.8, see https://github.com/vinecopulib/vinecopulib/releases. The most relevant changes are summarized below.
NEW FEATURES
new vine_dist and vine classes for data with non-uniform margins (#97).
new function truncate_model() for vinecop_dist and vine_dist objects (#95, #97).
new convenience functions get_pair_copula(), get_parameters(), get_ktau(), get_family() for bicop_dist, vinecop_dist and vine_dist objects (#95, #107, #109).
new convenience functions get_matrix(), get_all_pair_copulas(), get_all_parameters(), get_all_ktaus(), get_all_families() for vinecop_dist and vine_dist objects (#95, #107, #109).
new (dim) and improved (print, summary and logLik) generic methods for vinecop_dist and vine_dist objects (#104, #109, #110).
new function pseudo_obs to compute pseudo-observations (#108).
BUG FIXES
make mcor correction less aggressive (#103).
fix truncation of pdf values (#103).
use increased search interval for parameter estimation when initial fit is unreasonable (#103).
ensure that boundaries are respected for Joe’s hinv methods (#103).
improve numerical stability by more restrictive parameter bounds for Joe and BB7 copulas (#103).
Release following the updates of vinecopulib to 0.2.7, see https://github.com/vinecopulib/vinecopulib/releases. The most relevant changes are summarized below.
NEW FEATURES
"mcor".BUG FIXES
"tll".Patch of rvinecopulib 0.2.6.1.0.
BUG FIXES
Release following the updates of vinecopulib to 0.2.6, see https://github.com/vinecopulib/vinecopulib/releases. The most relevant changes are summarized below.
NEW FEATURES
add checks for data in (0, 1).
improved bandwidth selection for method "tll" by scaling with maximum-correlation coefficient.
add mBICV criterion to select the truncation level and threshold along with new function mBICV().
BUG FIXES
Release following the updates of vinecopulib to 0.2.4 and 0.2.5, see https://github.com/vinecopulib/vinecopulib/releases. The most relevant changes are summarized below.
NEW FEATURES
faster simulation and pdf functions for truncated vines.
speed up vine copula algorithms by pre-computing information related to the vine structure.
the selected threshold parameter can be returned from an vinecop object.
BUG FIXES
make bb8 lower bound ensure feasible computations in par_to_tau().
default initialize Rcout (#277).
fix storage order of pair copulas when structure is fixed.
fixed selection algorithm for threshold and truncation level.
Release following the update of vinecopulib to 0.2.3, see https://github.com/vinecopulib/vinecopulib/releases/tag/v0.2.3. The most relevant changes are summarized below.
NEW FEATURES
BUG FIXES
Release following the updates of vinecopulib to 0.2.1 and 0.2.2, see https://github.com/vinecopulib/vinecopulib/releases/tag/v0.2.1 and https://github.com/vinecopulib/vinecopulib/releases/tag/v0.2.2. The most relevant changes are summarized below.
NEW FEATURES
faster vine copula estimation and selection by parallelizing further sub-routines.
enhanced cross-platform compatibility.
increased precision of maximum-likelihood estimators.
allow "loglik" as selection criterion.
BUG FIXES
fixed itau estimation method for Frank copulas (only allowed for positive parameters).
make interpolation grid symmetric around (0.5, 0.5) again (for "tll" estimator).
Release following the update of vinecopulib to 0.2.0, see https://github.com/vinecopulib/vinecopulib/releases/tag/v0.2.0. The most relevant changes are summarized below.
PACKAGING/DEPENDECY
the C++ core of the library (besides wrappers) is now header only, so other R packages can access its functionality easily via LinkingTo.
removed dependency on NLopt.
NEW FEATURES
NA handling.
parallelized selection/estimation of (pair-) copulas, see the cores argument in bicop() and vinecop().
efficient storage and fitting of truncated vines.
Brent line search for (profile-) maximum-likelihood estimation of one-parameter families.
more restrictive parameter bounds for Archimedean families, ensuring their numerical stability.
BUG FIXES
error thrown whenever vinecop() or bicop() are called with data sets containing a single row.
made order of rvinecop(..., U) consistent for d = 2 and d > 2.
fixed bug in interpolation of kernel estimators near upper right corner.
interpolation grid is now symmetric around (0.5, 0.5).
stabilized quadratic tll estimator near zero.
stabilized Archimedean pdfs.