model.matrix.cca {vegan} | R Documentation |
Function model.frame.cca
reconstructs a data.frame
with the variables used in the constrained ordination method
(cca
, rda
or capscale
.
Function model.matrix.cca
creates a list of design matrices used
in constrained ordination. The items of the list are called
Conditions
and Constraints
. If either partial
(Conditions
) or constrained component was missing,
a single matrix is returned.
## S3 method for class 'cca': model.frame(formula, ...) ## S3 method for class 'cca': model.matrix(object, ...)
formula, object |
A constrained ordination result object from which the needed information is extracted. |
... |
Other arguments passed to the default method of the function. |
The constrained ordination method objects do not save data on model frame or design matrix, and the functions must reconstruct the information in the session. This will fail if the data sets and variables of the original model are unavailable.
Returns a data frame (model.frame
) or an unnnamed matrix or a list
of two matrices called Constraints
and Conditions
(model.matrix
).
Jari Oksanen
data(dune) data(dune.env) mod <- cca(dune ~ poly(A1, 2) + Management + Use, dune.env) model.frame(mod) model.matrix(mod)