corBlomberg {ape} | R Documentation |
The “ACDC” (accelerated/decelerated) model assumes that continuous traits evolve under a Brownian motion model which rates accelerates (if g < 1) or decelerates (if g > 1) through time. If g = 1, then the model reduces to a Brownian motion model.
corBlomberg(value, phy, form = ~1, fixed = FALSE) ## S3 method for class 'corBlomberg' corMatrix(object, covariate = getCovariate(object), corr = TRUE, ...) ## S3 method for class 'corBlomberg' coef(object, unconstrained = TRUE, ...)
value |
the (initial) value of the parameter g. |
phy |
an object of class |
form |
(ignored). |
fixed |
a logical specifying whether |
object |
an (initialized) object of class |
covariate |
(ignored). |
corr |
a logical value specifying whether to return the correlation matrix (the default) or the variance-covariance matrix. |
unconstrained |
a logical value. If |
... |
further arguments passed to or from other methods. |
an object of class "corBlomberg"
, the coefficients from an
object of this class, or the correlation matrix of an initialized
object of this class. In most situations, only corBlomberg
will
be called by the user.
Emmanuel Paradis
Blomberg, S. P., Garland, Jr, T., and Ives, A. R. (2003) Testing for phylogenetic signal in comparative data: behavioral traits are more labile. Evolution, 57, 717–745.