Description Usage Arguments Details Value Author(s) References See Also Examples

This function calculates delta (*δ*), the differential
between allelic frequencies in two populations. It is called by the
function `prepare.data`

.

1 | ```
delta(SpA, SpB)
``` |

`SpA` |
a vector of population allele frequencies. |

`SpB` |
a vector of population allele frequencies. |

This function calculates the allele frequency differential for a pair of
species or populations (*δ*, Gregorius and Roberds 1986) for a
single locus.

*
delta = sigma(|f_i1 - f_i2|/2)*

where *f_{i1}* and *f_{i2}* denote the frequency of the
*i*th allele in populations one and two, respectively.
*δ* ranges from 0, for identical populations, to 1, for
populations that share no alleles in common.

This function returns a vector of length one with the value of *δ*.

Zachariah Gompert [email protected], C. Alex Buerkle [email protected]

Gregorius, H. R. and Roberds, J. H. (1986) Measurement of genetical
differentiation among subpopulations. *Theoretical and Applied
Genetics*, **71**, 826-834.

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