[R-pkgs] New version of actuar

From: Vincent Goulet <vincent.goulet_at_act.ulaval.ca>
Date: Mon, 15 Sep 2008 16:02:06 -0400

We are pleased to announce the immediate availability of version 1.0-0 of actuar. This release follows publication of our papers in JSS (*) and R News (**). From the NEWS file:

Version 1.0-0


NEW FEATURES    o Improved support for regression credibility models. There is now

     an option to make the computations with the intercept at the
     barycenter of time. This assures that the credibility adjusted
     regression line (or plane, or ...) lies between the individual and
     collective ones. In addition, contracts without data are now
     supported like in other credibility models.

   o Argument 'right' for grouped.data() to allow intervals closed on
     the right (default) or on the left.

   o Method of quantile() for grouped data objects to compute the
     inverse of the ogive.

USER-VISIBLE CHANGES    o cm() no longer returns the values of the unbiased estimators when      method = "iterative".

   o Specification of regression models in cm() has changed: one should

     now provide the regression model as a formula and the regressors
     in a separate matrix or data frame.

   o Due to above change, predict.cm() now expects 'newdata' to be a
     data frame as for stats:::predict.lm().

   o Function bstraub() is no longer exported. Users are expected to
     use cm() as interface instead.

BUG FIXES    o Functions r<foo>() are now more consistent in warning when NA's      (specifically NaN's) are generated (as per the change in R 2.7.0).

   o frequency.portfolio was wrongly counting NAs.

   o Domain of pdfs returned by aggregateDist() now restricted to      [0, 1].

   o Quantiles are now computed correctly (and more efficiently) in 0      and 1 by quantile.aggregateDist().

   o coverage() no longer requires a cdf when it is not needed, namely      when there is no deductible and no limit.

The CRAN page for the package is

        http://cran.r-project.org/package=actuar

The project's web site is

        http://www.actuar-project.org

Comments and contributions to the project are more than welcome.

(*) http://www.jstatsoft.org/v25/i07
(**) http://cran.r-project.org/doc/Rnews/Rnews_2008-1.pdf

---
   Vincent Goulet, Associate Professor
   École d'actuariat
   Université Laval, Québec
   Vincent.Goulet@act.ulaval.ca   http://vgoulet.act.ulaval.ca

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Received on Wed 17 Sep 2008 - 06:51:54 EST

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