There is a new as.data.frame method.
Both left and right plot margins can be adjusted to allow, for example, for long taxon names or long legend labels.
There is now an example showing how to plot a tree with long taxon names.
Error messages and examples have been improved somewhat.
The manual and help pages have been streamlined.
The arguments to the various plot methods have changed.
There is now much finer control over the plotting.
In particular, one can specify a different palette of colors, adjust the width of the margin in which taxon labels are printed, and pass options separately to the base-graphics plot, text, and legend commands under0lying the ouch plot methods.
A layout bug in plot has been fixed.
The plot function now spaces the terminal taxa evenly.
The documentation has received an overhaul.
Depends on R>=3.6. This change necessitated by modifications to the default RNG with R version 3.6.
Changes to the organization of the package.
Upgrade the package license to GPL version 3.
Improvements to the underlying C code, which now registers callable functions.
In glssoln, when the Choleski decomposition fails, a warning is issued and NAs are returned.
In previous versions, an error was thrown.
'as(tree,"data.frame")' now returns a data-frame with rownames identical to the node-names (tree@nodes).
Functions that have been deprecated since 2.1-1 have been removed. The argument 'alpha' that was deprecated in favor of 'sqrt.alpha' in version 2.6-1 has been removed.
Fixed typo in the documentation of 'hansen'. Thanks to Roland Sookias for bringing this to my attention.
In the 'hansen' function, the use of the argument 'alpha' was confusing. This vector parameterizes the "selection" portion of the OU model, which since version 2 has been assumed to be a positive-definite matrix (corresponding to stabilizing selection). In particular, it contains the entries of the lower-triangular matrix square root of this positive definite matrix. To make the name more mnemonic, this argument has been renamed 'sqrt.alpha'. This is a superficial change meant to improve intelligibility: the algorithm itself has not changed. To prevent loss of backward compatibility, use of argument 'alpha' will continue to work, though it will generate a warning. In some future release, use of 'alpha' as an argument to 'hansen' will no longer generate a warning but will instead be passed through to the control list for 'optim' if method='optim' and will otherwise generate an error.
Version 2 of ouch represents a major revision. ouch's capabilities have been substantially extended.
support is now provided for multivariate characters. Inference based on multivariate Ornstein-Uhlenbeck and multivariate Brownian motion models is now provided.
nonultrametric trees are supported.
the root character state need no longer be estimated. Instead, the root state is assumed to be distributed according to the stationary distribution of the OU process.
convenience functions for parametric bootstrap confidence intervals are provided.
the new function 'paint' simplifies the specification of adaptive regimes in complex phylogenies.
the new function 'ape2ouch' translates trees in the 'phylo' format of the ape package into 'ouchtree' format (thanks to Dan Ackerly).
The new package is a complete rewrite, using S4 classes. The old functionality from ouch v. 1 remains available, but is now deprecated.