r {petitr} | R Documentation |
Calculates the intrinsic rate of increase by solving the Birch equation. Uses the Newton method.
r(tab, eps = eps, maxiter = 100)
tab |
a data.frame with three columns : x, the age, lx, the proportion of survivors at age x, mx, the offspring number per individual in the age class x |
eps |
Precision for the convergence of Newton method. Default is object eps transmitted by the calling function r. must be defined for a standalone use |
maxiter |
maximum number of iterations for the Newton's method. default = 100 |
a single numeric value : r
Jean-Sebastien PIERRE
Lotka 1924, Birch 1948.
petitr,xlxmx,ranova
data (tblif)
r(tblif,eps=0.0000001)