disp_rate_fission: Dispersal speed for deme fission model
In robjohnnoble/demonanalysis: Analysis and plotting of demon data

Description Usage Arguments Details Value Examples

Dispersal speed for deme fission model

1 2	disp_rate_fission(r2, K, m, migration_type = 2, migration_edge_only = 0, two_dim = TRUE, NumCells = NA)

`r2`	birth rate relative to reference birth rate
`K`	deme carrying capacity
`m`	migration rate per cell, relative to birth rate
`migration_type`	2 or 3 (see details)
`migration_edge_only`	whether migration occurs at the edge only
`two_dim`	whether to adjust for two-dimensional growth
`NumCells`	total population size (all demes); required only if migration_type = 2 or 3 and migration_edge_only = 0

Assumes that a deme cannot attempt fission until its population size reaches K.

Meaning of migration_type:

2: fission, such that a fission attempt occurs only following a birth event
3: fission, such that fission is independent of birth

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

disp_rate_fission(1, 2, 0.1, NumCells = 1e6)
disp_rate_fission(1, 2, 0.1, migration_type = 3, NumCells = 1e6)

# compare observed and predicted dispersal rates:
df <- combine_dfs(system.file("extdata", "", package = "demonanalysis", mustWork = TRUE), 
include_diversities = FALSE)
rate_obs <- median(df$RadiusGrowthRate[which(df$NumCells > 400)])
rate_pred <- disp_rate_fission(1, 1, 1, migration_edge_only = 1)
rate_pred / rate_obs