Multivariate Abundance Data Objects
mvabund creates an mvabund object.
as.mvabund attempts to turn its argument into an mvabund object.
is.mvabund tests if the argument is an mvabund object.
mvabund is a class of objects for which special-purpose plotting and regression functions have been written in the
mvabund-package. The above are useful preliminary functions before analysing data using the special-purpose functions. These new functions were written specially for the analysis of multivariate abundance data in ecology, hence the title 'mvabund'.
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these arguments are of either the form value or tag = value. Component names are created based on the tag (if present) or the deparsed argument itself.
logical, whether missing values should be removed.
an R object.
It is desirable to convert abundance data to
mvabund objects, to allow
automatic use of all methods for mvabund objects, for example the provided
methods for plotting, linear and generalised linear model-fitting and inference.
Some more technical details:
mvabund objects always have two dimensions.
mvabund converts its arguments into an mvabund object. The supplied argument can be a matrix, data frame, a list of vectors, or several vectors as separate arguments.
If elements of the created
mvabund object are not numeric, a warning will be printed.
row.names are not supplied, the row names of the
object will be
NULL. If the length of row.names does not match the
number of rows or there are duplicates, an error message will result.
as.mvabund returns an mvabund object.
x is a matrix and
Ulrike Naumann and David Warton <David.Warton@unsw.edu.au>.
Also see the
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