leslie.row1: leslie.row1
In hanase/demogR: Analysis of Age-Structured Demographic Models

Description Usage Arguments Details Value See Also Examples

A utility for calculating the first row of a Leslie matrix from vectors of interval survival probabilities and age-specific fertility rates.

1	leslie.row1(mx, px, L = NULL, SRB = 1.05, peryear = 5, one.sex = TRUE)

`mx`	vector of age-specific fertilities (length=k)
`px`	vector of interval survival probabilities (length=k-1)
`L`	person-years lived in the first interval; default `L=NULL` in which case each element is multiplied by peryear*sqrt(px[1]), otherwise each element is multiplied by L.
`SRB`	sex ratio at birth; default `SRB=1.05`.
`peryear`	width of the age-class/projection interval
`one.sex`	should each element be reduced by a factor 1/(1+SRB)? default `one.sex=TRUE`.

Calculates the first-row entries for a Leslie matrix. This utility is particularly useful for constructing simulated Leslie matrices.

A vector of length k, where k is the rank of the projection matrix A.

leslie.matrix

## simulate survival values from a beta(9,1) distribution

px <- rbeta(10,9,1)

## simulate fertility values from a gamma(2,10) distribution with age
##   at first reproduction = 10

mx <- c(0,0,0,rgamma(8,2,10))
A <- odiag(px,-1)
Fx <- leslie.row1(mx,px)
A[1,] <- Fx