richness.yule.test {ape} | R Documentation

## Test of Diversification-Shift With the Yule Process

### Description

This function performs a test of shift in diversification rate using probabilities from the Yule process.

### Usage

    richness.yule.test(x, t)

### Arguments

`x` | a matrix or a data frame with at least two columns: the first one gives the number of species in clades with a trait supposed to increase or decrease diversification rate, and the second one the number of species in the sister-clades without the trait. Each row represents a pair of sister-clades.
`t` | a numeric vector giving the divergence times of each pair of clades in `x`.

### Value

a data frame with the chi2, the number of degrees of freedom (= 1), and the P-value.

### Author(s)

Emmanuel Paradis

### References

Paradis, E. (2012) Shift in diversification in sister-clade comparisons: a more powerful test. Evolution, 66, 288–295.

### See Also

`slowinskiguyer.test`, `mcconwaysims.test`, `diversity.contrast.test`

### Examples

    ### see examples(mcconwaysims.test)

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