calc_T: Mean Generation Time T

In insectecol: Insect Ecology Data Analysis Toolkit

Mean Generation Time T

Description

The mean generation time, calculated as T = log(R0) / r: the time needed for the population to grow to an R0-fold of its current size when increasing at the constant rate r.

Usage

calc_T(lt, R0 = NULL, r = NULL)

Arguments

lt	A life_table object returned by lifeTable_read.
R0	Optional; the result of calc_R0.
r	Optional; the result of calc_r. Supplying them avoids recomputing.

Value

A single numeric value: the mean generation time T (days).

References

Goodman, D. (1982) Optimal life histories, optimal notation, and the value of reproductive value. The American Naturalist 119(6), 803-823.

See Also

calc_R0, calc_r

Examples

f <- system.file("extdata", "lifetable_example.csv", package = "insectecol")
lt <- lifeTable_read(f)
calc_T(lt)

insectecol documentation built on Oct. 5, 2026, 5:08 p.m.