This function performs a basic estimation of axial dispersal for a numeric vector of distances between close kin dyads. The axial dispersal distance returned is interpretable as the standard deviation of one dimension of a symmetric bivariate random distribution centred on zero.
axials(valvect, composite = 1)
A numeric vector of distances between close kin OR an object of class
numeric. The number of separate 'draws' (dispersal events) from the kernel required to produce the final positions of the measured individuals. For example, the displacement of a child from parent at the same lifestage would involve 1 draw and thus be composite = 1. Two full siblings would be two draws (composite = 2) from the FS kernel. Non-symmetric relationships (e.g. AV, 1C) should not be decomposed using this method, nor should any assumptions be made about different kernels (e.g. the 1C relationship would appropriately be given the value 2, but not 4)
Returns the value of the estimated axial dispersal distance of the kernel producing the dispersal distances measured. (numeric)
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po_dists <- c(5, 6, 7.5) axials(po_dists) # one 'draw' (dispersal event) goes into the parent offspring category # so composite is left to its default of 1 fs_dists <- c(2, 3, 3) axials(fs_dists, composite = 2) # two 'draws' (symmetric dispersal events) # go into the full sibling category so composite is set to 2
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