Log Message:
(math/R-car) Updated 3.0.13 to 3.1.1

Changes to Version 3.1-1

  o Fixed bug in hccm(): when some cases are fit exactly all versions
    of the hccm estimate are singular and inconsistent.  A error message
    is now returned.

  o Fixed bug in Anova.survreg() for Wald tests (reported by Megan
    Taylor Jones), which failed with a spurious "missing residual df"
    error.

  o Made Anova.lm() more robust when there are aliased coefficients
    (following report of cryptic output by Taiwo Fagbohungbe).

  o Added reg.function, reg.function.col, and mouseMode arguments to
    scatter3d(), and mouseMode to crPlot3d().

  o Added fill and associated arguments to influencePlot() (initial
    implementation of Michael Friendly).

  o Added confidenceEllipses() function to create matrix of all
    pairwise confidence ellipses for a regression model (suggestion of
    Michael Friendly).

  o Moved the pointLabel() function from the maptools package in
    anticipation of the retirement of that package, and with the
    permission of the function author, Tom Short.

Changes to Version 3.1-0

  o New 3D added-variable and component+residual plots, avPlot3d() and
    crPlot3d().

  o More flexible recode()/Recode().

  o Added Anova.svycoxph() to prevent selection of test.statistic="LR".

  o New take on vif.lm().