theta.k

From ape v2.1-1
0th

Percentile

Population Parameter THETA using Expected Number of Alleles

This function computes the population parameter THETA using the expected number of alleles.

Keywords
manip, univar
Usage
theta.k(x, n = NULL, k = NULL)
Arguments
x
a vector or a factor.
n
a numeric giving the sample size.
k
a numeric giving the number of alleles.
Details

This function can be used in two ways: either with a vector giving the individual genotypes from which the sample size and number of alleles are derived (theta.k(x)), or giving directly these two quantities (theta.k(n, k)).

The argument x can be either a factor or a vector. If it is a factor, then it is taken to give the individual alleles in the population. If it is a numeric vector, then its values are taken to be the numbers of each allele in the population. If it is a non-numeric vector, it is a coerced as a factor.

Both arguments n and k must be single numeric values.

Value

• a numeric vector of length one with the estimated theta.

Note

For the moment, no standard-error or confidence interval is computed.

References

Ewens, W. J. (1972) The sampling theory of selectively neutral alleles. Theoretical Population Biology, 3, 87--112.

theta.h, theta.s