ratebystate {phytools} | R Documentation |
This function attempts to ask if the rate of a continuous character, y
, depends on the state of a separate continuous trait, x
. This is accomplished by regressing the squared contrasts in y
on the branch or node ancestral estimates of x
.
ratebystate(tree, x, y, nsim=100, corr=c("pearson","spearman"), ...)
tree |
phylogenetic tree. |
x |
a continuous character - the dependent variable in the model. |
y |
a second continuous trait - the response variable. |
nsim |
number of simulations for hypothesis testing. |
corr |
correlation method to use. Same as in |
... |
optional arguments which include |
This function returns a list with up to the following four elements:
beta |
value of the regression coefficient for square of the contrasts in |
r |
correlation coefficient for |
corr |
string giving the value of |
method |
string giving the value of |
Liam Revell liam.revell@umb.edu
Revell, L. J. (2012) phytools: An R package for phylogenetic comparative biology (and other things). Methods Ecol. Evol., 3, 217-223.