petitr: Per capita growth rate from individual data

In petitr: Relative Growth Rate

Description

calculates the per capita growth rate of a series of individuals through the set of individual life tables

Usage

petitr(tabvie, niter = 100, eps = 1e-07, m = 1, alpha = 0.05, s = 1)

Arguments

tabvie	A data.frame with a first column recording the endpoint of age classes, and as many columns as individuals. For each individual, each row represents the number of offspring produced by the individual vetween age x-1 and age x. After death or after the end of reproductive life, each column must be filled by zeros . The last row represents therefore the maximum reproductive age observed in the data set. The number of columns is n+1, where n is the number of individuals.
niter	the maximum number of iterations for the Newton's method. Default is 100
eps	Precision required for the Newton's method. Default is 1e-07.
m	Size of the subsamples to drop one after one in the Jackknife method. Default is m=1. Any other value must divide exactly n,the number of individuals.
alpha	First kind error risk. Default is alpha=0.05.
s	ex ratio expressed as the proportion of females in the total population. Default is 1, meaning a parthenogenetic population (ex. aphids). For a sexual population one would often set s=0.5.

Details

Calls r, and xlxmx, called by ranova.

Value

a vector with the pseudovalues of r calculated by the jackknife method

Author(s)

Jean-Sebastien Pierre [e-mail]

References

Birch, L. C. 1948. The intrinsic rate of natural increase of an insect population. - Journal of Animal Ecology 17: 15-26. Lotka, A. (1924). Elements of mathematical biology. Reprinted 1956 by Dover Publications Inc., New York, USA.

See Also

r, and xlxmx, called by ranova

Examples

data(life)
petitr(life)

petitr documentation built on May 2, 2019, 6:42 a.m.