popbio (version 2.4.4)

stretchbetaval: Generate stretched beta-distributed random numbers

Description

Generate a stretched beta number with mean, standard deviation, minimum and maximum values and CDF value for bounded fertility estimates

Usage

stretchbetaval(mn, std, minb, maxb, fx)

Arguments

mn

mean of a fertility rate

std

standard deviation

minb

minimum value

maxb

maximum value

fx

Cumulative Distribution Function value

Value

Returns a stretched beta number with mean mn, standard deviation std, minimum and maximum values (minb, maxb) and CDF value fx.

Details

This function calls function 'betaval'.

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

betaval

Examples

# NOT RUN {
stretchbetaval(3, 1.2, 1, 20, runif(1))

 # Generates stretchbeta random
 # fertilities for a population of 1000 mature individuals (Ni) with mean
 # fertility (f) of 3.0 and inter-individual variance in fertility (varF) of 1.5.
 
 Ni   <- 1000
 f    <-    2.5
 varF <-    1
 fmin <- 1
 fmax <- 5
 rndfert<-numeric(Ni) 
for(i in 1:Ni)
{
   rndfert[i]  <- stretchbetaval(f, sqrt(varF), fmin, fmax, runif(1)) 
}
 hist(rndfert,20, main="Stretched beta-distributed random fertilities", 
xlab="Fertility rate", , col="blue") 
# }