Pairwise Distances from Genetic Data
This function computes a matrix of distances between pairs of individuals from a matrix or a data frame of genetic data.
dist.gene(x, method = "pairwise", pairwise.deletion = FALSE, variance = FALSE)
This function is meant to be very general and accepts different kinds of data (alleles, haplotypes, SNP, DNA sequences, ...). The rows of the data matrix represent the individuals, and the columns the loci.
In the case of the pairwise method, the distance $d$ between two individuals is the number of loci for which they differ, and the associated variance is $d(L - d)/L$, where $L$ is the number of loci.
In the case of the percentage method, this distance is divided by $L$, and the associated variance is $d(1 - d)/L$.
For more elaborate distances with DNA sequences, see the function
an object of class
variance = TRUE an
"variance" is given to the returned object.
Missing data (
NA) are coded and treated in R's usual way.