disp_rate: Expected disperal speed for migration model
In robjohnnoble/demonanalysis: Analysis and plotting of demon data

Description Usage Arguments Value Examples

Expected disperal speed for migration model, allowing dispersal to occur before fixation

1 2	disp_rate(r1, r2, K, m, migration_type = 0, symmetric = FALSE, two_dim = TRUE, d = NA, approx = FALSE)

`r1`	birth rate of cells in the destination deme, relative to reference birth rate
`r2`	birth rate of migrating cells, relative to r1
`K`	deme carrying capacity
`m`	migration rate per cell, relative to birth rate
`migration_type`	0 or 1 (see details)
`symmetric`	whether migration occurs in both directions
`two_dim`	whether to adjust for two-dimensional growth
`d`	migration distance relative to 1/sqrt(K)
`approx`	if TRUE, return the approximate value when r2 -> r1 (weak selection) and r1 = 1

The growth rate of the radius, measured in cells (not demes).

disp_rate(1, 1.01, 2, 0.1, 0)
disp_rate(1, 1.01, 2, 0.1, 0, approx = TRUE)
disp_rate(1, 1.01, 2, 0.1, 1)

# no difference between migration_type = 0 and migration_type = 1 when r1*r2 = 1:
sapply(0:1, disp_rate, r1 = 0.5, r2 = 2, K = 32, m = 0.1)

# otherwise expect a difference:
sapply(0:1, disp_rate, r1 = 0.5, r2 = 3, K = 32, m = 0.1)