define density dependence function parameters

Usage

spmm.ddf.params(
  f_type = NA,
  s_type = NA,
  stages = NA,
  P = NA,
  BB = NA,
  MM = NA,
  r = NA,
  K = NA
)

f_type: Either Ricker or Beverton-Holt type density dependence on recruitment.
s_type: Currently implments only logistic type density dependence on survival.
stages: Number of stages being modeled.
P: Vec-permutation matrix.
BB: Block diagonal demographic matrix.
MM: Block diagonal movement (dispersal) matrix.
r: Baseline recruitment.
K: Carrying capacity.