Changes in cvTools version 0.3.3 + Updated maintainer email address. + Dependencies no longer listed in both 'Depends' and 'Imports'. + Fixed documentation for recent versions of package 'roxygen2'. + Wrapped long examples in \donttest{} environment. Changes in cvTools version 0.3.3 + Added functionality for cross-validation with grouped observations. + Bugfix in print() method for class "cvFolds": no longer produces warning. + Removed some examples to cut down example check times. The respective full examples from the previous versions are available in folder /inst/doc/examples-full as R scripts. Changes in cvTools version 0.3.2 + Bugfix in cvTool(): matrix of estimated prediction errors is now returned correctly for more than one replication (this bug was introduced in the bugfix for one replication from version 0.3.1). + Added tests for cvTool(), cvFit() and cvTuning() using package 'testthat'. Changes in cvTools version 0.3.1 + Bugfix in cvTool(): matrix of estimated prediction errors is now returned correctly for one replication. + Bugfix in cvTuning(): "function" method now correctly stores matched call. Changes in cvTools version 0.3.0 + Changed some argument and component names regarding standard errors. Changes in cvTools version 0.2.0 + New generic function repCV() for (repeated) K-fold cross-validation. The example functions cvLm(), cvLmrob() and cvLts() are now aliases for the respective methods. + Bugfix in cvFit(): default names are retained if cvTool() returns a 1x1 matrix. + Bugfix in plot.cvSelect(): default handling of argument 'method' no longer throws error in case of only one replication. + Added functionality to incorporate standard errors. + cvSelect() and cvTuning() now allow to specify criterion for selecting the best model via the argument 'selectBest'. + New xyplot() and dotplot() methods for class "cv". Changes in cvTools version 0.1.1 + Added different types of obtaining CV folds.