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Changes to Version 2.0-11

  	o the arguments to deltaMethod have changed, with parameterPrefix replaced by parameterNames.  See documentation for useage.
  
  	o deltaMethod methods for lmList, nlsList, and mer objects have been added.  The syntax for the multinom method has been improved.

  	o the 'layout' argument is used in several graphical functions to deterine the layout of multiple graphs within the same graphical window.  Setting layout=NA in these functions suppresses this behavior and the user can set the layout outside the function (suggested by Steve Milborrow)

	o compareCoefs() works with 'mer' objects created by lme4
  
  	o  avPlot() now will optionally plot concentration ellipses; avPlot() and avPlots() invisibly return coordinates (suggested by Michael Friendly, with contributed code).

  	o  dataEllipse() now allows combination of add=FALSE and plot.points=FALSE (suggested by Michael Friendly, with contributed code); the ellipse functions have acquired a "draw" argument, which can be used to suppress graphical output (suggestion of Benoit Bruneau).

	o  ellipse(), confidenceEllipse(), and dataEllipse() return coordinates invisibly (suggested by Michael Friendly, with contributed code).
	
	o  fixed bug in printed representation of hypotheses with numbers starting with "-1" or "+1" (e.g., "-10") by linearHypothesis() (reported by Vincent Arel-Bundock).
	
	o  local version of fixef() to avoid lme4/nlme conflicts that surfaced in some situations with Anova().
	
	o  changed order of columns in ANOVA tables for mixed models to make them consistent with other models.

Changes to Version 2.0-10

    o  changed tukeyNonaddTest to be sure the test exists.

    o  changed the default in residualPlots for AsIs from FALSE to TRUE.
    
    o  improved color choice in scatterplot and scatterplotMatrix (at suggestion of Dan Putler).
    
    o  moved up ... argument in qqPlot.default (suggestion of Peter Ehlers).
    
    o  changed label on marginal model plot for generalized linear models verses fitted values to 'fitted values' rather than the incorrect 'Linear predictor"

    o  mmp now passes graphical parameters to par

    o  mmps now works correctly with 'gam' models (mgcv package)
    
    o  modified bootCase to work with multivariate lm objects
    
    
Changes to Version 2.0-9

	o  added Anova and linearHypothesis methods for mixed-effects model objects created by lmer in lme4 and lme in nlme.
	
	o  added matchCoefs, convenience function to use with linearHypothesis.

    o  scatterplot makes parallel boxplots, calling Boxplot, when x is a factor.
    
    o  mmps (marginal model plots) works better with multidimensional terms like splines and polynomials, and permits plotting against terms in the data frame but not in the model formula.  AsIs argument removed.
    
    o  residualPlots handles matrix-predictors similarly to mmps, above.
    
    o  recode allows the recode-specification string to be split over more than one line.
    
    o  small fixes to Anova.multinom, Anova.polr, and leveneTest.

Changes to Version 2.0-8

	o  added optional argument legend.coords to scatterplot to place legend (after question by Blaine Maley).
	
	o  bug fixes to powerTransform and residualPlots.

Changes to Version 2.0-7

	o  added fill and fill.alpha arguments to ellipse, etc., for translucent filled ellipses (suggested by Michael Friendly).
	
	o  fixed bug in recode, when a legitimate string includes the characters "else" (reported by Gustaf Rydevik).
	
	o  carWeb() now works with web site for the R Companion, Second Edition.

Changes to Version 2.0-6

    o  change influenceIndexPlots to used type="h" rather than type="l".
    
    o  added surface.alpha and ellipsoid.alpha arguments to scatter3d.

Changes to Version 2.0-5

    o  add xlab and ylab arguments to avPlots, crPlots, ceresPlots, etc.,
to override default labeling if desired.

    o  fix col and col.lines arguments in avPlots, crPlots, ceresPlots, etc., so
graphical functions work the same way.

	o  confidenceEllipse.lm and .glm now have add argument, courtesy of Rafael Laboissiere.

    o  small fixes to docs.

Changes to Version 2.0-4

    o  fix col argument to work to set point colors with residualPlots, leveragePlots, invTranPlot, marginalModelPlots

Changes to Version 2.0-3

    o  coefTable() changed to compareCoefs() to avoid name clash with the miscTools package (reported Arne Henningsen).
    
    o  Small changes.

Changes to Version 2.0-2

    o leaps package demoted from Depends to Suggests to avoid problem for Debian (reported by Dirk Eddelbuettel).

Changes to Version 2.0-1

    o  No longer export non-standard coef.multinom() (problem reported by Brian Ripley, Achim Zeileis).

Changes to Version 2.0-0

	o  Functions renamed to camel case.
	
	o  New functions: bootCase(), Boxplot(), deltaMethod(), inverseResponsePlot(), invTranPlot(), various transformation functions
	
	o  Reworked (or renamed): Anova(), avPlots(), boxCoxVariable(), boxTidwell(), ceresPlots(), crPlots(), durbinWatsonTest(), hccm(), influencePlot(), leveneTest(), leveragePlots(), linearHypothesis(), ncvTest(), outlierTest(), qqPlot(), regLine(), scatterplot(), scatterplotMatrix(), spreadLevelPlot(), transformation-axis functions, vif().
	
	o  Removed: Ask(), box.cox.powers(), box.cox(), cookd(), n.bins().
	
	o  Added WeightLoss data set (courtesy of Michael Friendly).
	
	o  Utility functions no longer exported; some removed.
	
	o  Most moved, renamed, removed functions retained as deprecated functions.
	
	o  Improvements to linearHypothesis(), thanks to Achim Zeileis.
	
	o  Small changes.

Changes to Version 1.0-0

   o Added functions for effects plots [see help(effect)].
   
   o Edited .Rd files to use \method{} for generics.
   
   o Changed some F's to f's
   
   o Modified durbin.watson to allow directional alternative hypotheses
   
Changes to Version 1.0-1

   o Reworked glm methods for Anova for type II LR and F tests to avoid scoping issues produced by use of update.
   
   o Added reset.par argument to scatterplot.default to allow addition of graphical elements to the plot.
   
   o The generic function Var and its methods are deprecated, in favour of vcov, now in the base package.
   
Changes to Version 1.0-2

    o The fitted line can be suppressed in qq.plot.
    
    o ceres.plots can now handle models that include transformed predictors -- e.g., log(x), I(x^2).
    
    o Fixed bug in Anova which caused it to fail calculating type-II F or LR tests for glms in certain circumstances. (Bug introduced in version 1.0-1.)

    o Made arguments of method functions consistent with generics (mostly adding ... to methods).
    
    o Fixed a bug in plot.effect which caused nonalphabetical orderings of factor levels to be lost; added arguments cex, xlim, and ylim to plot.effect.
    
    o Modified effect to permit computing effects for terms not in the model or with higher-order relatives in the model.
    
    o Added functions contr.Treatment, contr.Sum, and contr.Helmert; see help(Contrasts).
    
    o Added Burt.txt data set (to go with Burt.Rd documentation file already there).
    
    o Added Arrests.txt data set.
    
    o Fixed an error in hccm.lm which produced incorrect values for the "hc1", "hc2", and "hc3" corrections; added "hc4" correction.
    
    o Modified influence.glm to handle 0 prior weights; changes to influence.lm and influence.glm to insure compatibility with R 1.7.0.
    
    o removed quietly=TRUE from several calls to require(), to avoid invisibly altering the search path.
    
Changes to Version 1.0-3

    o All deletion diagnostics (with the exception of cookd) have been moved to the base package (as of R 1.7.0) and are removed from car; cookd now simply calls cooks.distance in the base package.
    
    o plot.effect modified was modified so that it can plot on the scale of the "link" function but label axes on the scale of the response. See ?plot.effect for details.
    
Changes to Version 1.0-4

    o Modified box.cox.powers to accept hypotheses to be tested.
    
    o Removed effect-display functions (to effects package).
    
    o Added warnings to Anova methods for F-tests in binomial and Poisson GLMs that the dispersion is estimated rather than taken as 1.
    
Changes to Version 1.0-5

    o Small changes to scatterplot and scatterplot.matrix to avoid "condition has length > 1" warnings.
    
Changes to Version 1.0-6

    o Print method for outlier.test no longer prints NA for Bonferroni p-values > 1; prints "> 1".
    
Changes to Version 1.0-7

    o More small changes to scatterplot to avoid "condition has length > 1" warnings.
    
Changes to Version 1.0-8

    o Small correction to documentation for recode.
    
    o Restored missing States data frame.
    
    o Small documentation changes to pass new package checks.
    
Changes to Version 1.0-9

    o vif now reports an error if the model has fewer than 2 terms (not counting the constant)
    
    o Small changes.
    
Changes to Version 1.0-10

    o scatterplot.formula made compatible with na.action=na.exclude.
    
    o Documentation corrections to satisfy package checks in R 1.9.0 (devel).
    
Changes to Version 1.0-11

    o More documentation fixes.
    
    o Fix to print method for outlier.test.
    
Changes to Version 1.0-12

    o Small fix to box.cox.powers to avoid inconsequential warnings.
    
    o Removed dependency on now nonexistent modreg package.
    
    o Moved levene.test and influence.plot functions to car from the Rcmdr package.
    
    o box.cox now reports an error when it cannot compute an automatic start.
    
    o Fixed bug in ceres.plot.lm that caused an error when the subset argument was used to exclude observations in fitting the model.
    
    o Changed ncv.test to allow weighted lm object (suggested by Sandy Weisberg).
    
    o scatterplot.matrix now passes ... argument to pairs (also suggested by Sandy Weisberg).
    
Changes to Version 1.0-13

    o Small changes to levene.test and box.cox.powers to make output compatible with version 0.9-10 of the Rcmdr package.
    
Changes to Version 1.0-14

    o cr.plots() ignored its span argument when variable was specified in the call (thanks to Christophe Pallier for pointing this out).
    
    o Added some(), which prints a few randomly selected elements (or rows) of an object.
    
    o Added Anova() methods for multinomial logistic regression [via multinom() in the nnet package], and for proportional-odds logistic regression [via polr() in the MASS package). 
    
    o Made influence.plot() generic, with a method for lm objects that handles glm objects as well. 
    
Changes to Version 1.0-15

    o Changed recode() to accommodate factor levels with spaces (suggested by Dan Putler).
    
    o Added cex* arguments to scatterplot() and scatterplot.matrix(), and a jitter argument to scatterplot (suggested by CG Pettersson).
    
    o Added symbox() function for selecting a transformation to symmetry (a modified version of a function contributed by Gregor Gorjanc).
    
    o ncv.test() modified so that it doesn't fail when the variance formula has a different pattern of NAs than the model formula (adapting a suggestion by Achim Zeileis).
    
    o Added argument to spread.level.plot.default() to optionally suppress point labels (suggested by Josyf Mychaleckyj). 
    
    o vif() modified by Henric Nilsson to be applicable to generalized linear models and other models inheriting from class lm. Weighted linear models are now allowed. 
    
Changes to Version 1.0-16

    o Modified to linear.hypothesis by Achim Zeleis to support alternative coefficient covariance-matrix estimators for linear models (via new vcov argument); to provide both chisquare and F tests for both linear and generalized-linear models (via new test argument); and to produce neater output (from both .lm and .glm methods).
    
    o Anova methods modified to work with new linear.hypothesis functions.
    
Changes to Version 1.0-17

    o Fixed a bug in scatterplot() that caused marginal boxplots to be incorrect when xlim or ylim arguments are supplied (pointed out by Erich Neuwirth).
    
Changes to Version 1.0-18

    o Restored print.chisq.test(), used by ncv.test() (which had been removed when linear.hypothesis was changed).
    
    o Fixed bug in recode() that could cause values with mixed letters and numbers to be treated incorrectly (reported by David Dailey and Tom Mulholland).
    
Changes to Version 1.0-19

    o Fix to linear.hypothesis.lm and linear.hypothesis.glm, which were printing long formulas awkwardly (thanks to Henric Nilsson).
    
Changes to Version 1.0-20

    o Major reworking of linear.hypothesis (mostly due to Achim Zeleis) (1) to allow symbollic specification of the hypothesis, and (2) to provide a default method that is applicable to any model for which coef and vcov methods exist (or, in the latter case, for which a coefficient-covariance matrix is supplied).
    
    o The car package now has a namespace.

    o Fixes to Anova.multinom and Anova.polr reflecting changes to multinom and polr (thanks Huaibao Feng for a bug report).
    
    o Added cex argument to qq.plot methods, suggested by Peter Ehlers.
    
    o Modified box.cox so that the power argument can be a vector, returning a matrix of transformed values, adapting code contributed by Spencer Graves (but implementing different behaviour than the one suggested by Spencer).
    
    o Added identity.cex and identify.col arguments to influence.plot, as suggested by John Wilkinson.
    
    o Data sets are now provided as lazy data; Rd files updated to remove references to data() in examples.
    
    o Small modifications to documentation. 
    
Changes to Version 1.1-0

    o  New version of linear.hypothesis (mostly due to Achim Zeleis); some changes to other functions as a consequence.
    
Changes to Version 1.1-1

    o  Small changes to scatterplot.matrix, adapting contribution of Richard Heiberger.
    
    o  scatterplot now places the legend in the top margin rather than positioning it interactively.
    
    o  Cleaned up links to help files in standard packages.
    
Changes to Version 1.1-2

    o  Fixed small bug in linear.hypothesis() that caused the RHS to printed with NAs in some circumstances.
    
Changes to Version 1.2-0

    o  vif now reports a more understandable error message when a coefficient in the model is aliased (thanks to a question posed by Ulrike Grömping).
    
    o  recode now takes a levels argument (as suggested by Adrian Dusa).
    
    o  Corrected diagonal panel functions local to scatterplot.matrix.default, which omitted ... argument (pointed out by Kurt Hornik and Brian Ripley).
    
    o  New methods for multivariate-linear models (mlm objects) for linear.hypothesis and Anova. Added OBrienKaiser data set for examples.
    
Changes to Version 1.2-1

    o  The name of the function influence.plot was changed to influencePlot to avoid confusion with the influence generic in the stats package.
    
Changes to Version 1.2-2

    o  Bug fixed in the bc function (reported by Henric Nilsson).
    
    o  Error in Bfox data set is now pointed out.
    
    o  levene.test now checks that second argument is a factor.
    
    o  Removed extended=FALSE argument to gsub() in some internal functions, since this argument is ignored when fixed=TRUE and generates a warning in R 2.6.0 (reported by Arne Henningsen).
    
Changes to Version 1.2-3

    o  Replaced obsolete \non_function{} markup in Rd files (reported by Kurt Hornik).
    
Changes to Version 1.2-4

    o  Avoid warnings in linear.hypothesis() produced by unnecessary use of extended = FALSE argument to strsplit() (problem reported by Alejandro Collantes Chávez-Costa).
    
Changes to Version 1.2-5

    o  Fixed small bug in reg.line() (pointed out by Kurt Hornik).
    
Changes to Version 1.2-5

    o  Improvements to linear.hypothesis.mlm() and Anova.mlm(), e.g., to detect deficient-rank error SSP matrices (as suggested by Ralf Goertz).
    
    o  For models with only an intercept, Anova() with type="II" now substitutes equivalent type="III" tests (since the code for type="II" doesn't handle intercepts). This is especially useful for repeated-measures designs with only within-subjects factors (in response to a problem reported by Ralf Goertz).
    
Changes to Version 1.2-7

    o  Added Mauchly tests for sphericity in repeated-measures designs to summary.Anova.mlm() (suggested by Ralf Goertz).
    
Changes to Version 1.2-8

    o  HF eps > 1 is now set to 1 in adjusting df in summary.Anova.mlm(), consistent with the behaviour of anova.mlm() (suggested by Ralf Goertz).
    
    o  Fixed bug in summary.Anova.mlm() that surfaced when all univariate repeated-measures tests have 1 df and hence GG and HF corrections don't apply to any of the tests (reported by Ralf Goertz).
    
    o  levene.test() is now generic, contributed by  Derek Ogle.
    
    o  Small changes.
    
Changes to Version 1.2-9

	o  Fixed bug in scatterplot() that left room for a legend even when legend.plot=FALSE (reported by David Carlson).
	
	o  Allowed colours in col argument to scatterplot() to recycle (suggested by David Carlson).
	
	o  verbose=TRUE in linear.hypothesis() now prints (in addition to previous output) the estimated value of the hypothesis (Oleksandr Perekhozhuk).
	
Changes to Version 1.2-10

	o  Reworked Anova(), including adding default method and method for coxph objects.
	
Changes to Version 1.2-11

	o  Bug fix to Anova().
	
	o  Small changes.
	
Changes to Version 1.2-12

	o  Anova() now works properly with coxph objects with clusters.
	
	o  Fixed bug in ncv.test.lm() that could cause the function to fail.
	
	o  Small changes.
	
Changes to Version 1.2-13

	o  influencePlot() optionally automatically identifies points with large Cook's Ds (suggested by Michael Friendly).
	
	o  Fixed bug in recode() (reported by Andrew McFadden).

    o  Small changes.
    
Changes to Version 1.2-14

	o  Small correction to Chile data set.
	
Changes to Version 1.2-15

    o  Small changes.