What is ggvegan?
ggvegan is a package for the R statistical software and environment. It aims to implement ggplot-based versions of the plots produced by the vegan package. Initially, ggvegan will provide
autoplot methods for objects created in vegan, with the aim of providing full replacement plots via
fortify methods allow the data contained within objects created by vegan to be converted into a format suitable for use with
ggvegan is released under the GNU General Public Licence, version 2.
Development & contributions
ggvegan uses the roxygen2 system to document package functions alongside the code itself.
ggvegan is very much alpha code at the moment. Comments and feedback on the approach taken are welcome, as are code contributions. See Design decisions below for two important areas for consideration
autoplot concept is somewhat poorly defined at the moment — at least in public. I have taken it to mean that a full ggplot object is returned, which can then be augmented with additional layers and changes to the scales etc. This means that the aesthetics for the scores are hard-coded in the
autoplot methods. If you want greater control over these aesthetics, use
fortify to return the scores in a suitable format and build the plot up yourself. I hope to include at least one example of this, where applicable, in the help pages for each
fortify methods are supposed to return a data frame but this is not necessarily the most convenient representation for vegan’s ordination objects where several data frames representing the various sets of ordination scores would be more natural. Currently, ggvegan follows the existing
fortify convention of returning a single data frame so returns the ordination scores in long format with variables
Score indicating the type of score and
Label the label/rowname for each score. The first two components of the returned data frame are always named
Dim2; to which ordination axes/dimensions these refer is recorded in an attribute
dimlabels, which can be accessed via
fobj is the object returned by
A further design decision is that ggvegan
fortify methods for ordination objects will return all possible sets of scores and the set returned can not be chosen by the user. Instead, the sets of scores to be plotted should be chosen at the
autoplot methods are currently available
autoplot.cca— for objects of classes
autoplot.metaMDS— for objects of class
fortify method are currently available
fortify.cca— for objects of classes
fortify.metaMDS— for objects of class
No binary packages are currently available for ggvegan. If you have the correct development tools you can compile the package yourself after downloading the source code from github. Once I work out how to link git with svn I’ll start a project on R-forge which will host binary packages of ggvegan.
Finally, if you use Hadley Wickham’s devtools package then you can install ggvegan directly from github using functions that devtools provides.