lnorms: Generate random lognormal values for fertility rates

In popbio: Construction and Analysis of Matrix Population Models

Generate random lognormal values for fertility rates

Description

Converts standard normal random values to lognormals with defined means and variances

Usage

lnorms(n, mean = 2, var = 1)

Arguments

n	number of observations
mean	mean value of the fertility rate, default 2
var	variance of the vital rate (not standard deviation), default 1

Details

converted Matlab code from Box 8.4 in Morris and Doak (2002)

Value

A vector of random lognormal values

Note

This function could probably be replaced with built-in functions for the Log Normal Distribution rlnorm

Author(s)

Original Matlab code by Morris and Doak (2002: 281). Adapted to R by Patrick Nantel, 20 June 2005.

References

Morris, W. F., and D. F. Doak. 2002. Quantitative conservation biology: Theory and practice of population viability analysis. Sinauer, Sunderland, Massachusetts, USA.

See Also

stretchbetaval

Examples

lnorms(1)
# Generate lognormal random fertilities
# for a population of 1000 mature individuals with mean fertility of
# 3 and inter-individual variance in fertility of 1.5.
rndfert  <- lnorms(1000, 3,1.5)
summary(rndfert)
hist(rndfert,40, main="Lognormal random fertilities",
xlab="Fertility rate", col="blue")

popbio documentation built on May 29, 2024, 4:35 a.m.