generation.time: Generation time

Description Usage Arguments Details Value Note Author(s) References See Also Examples

View source: R/generation.time.R

Description

Calculates the generation time of a stage-classified matrix

Usage

1

Arguments

A

projection matrix

...

additional items are passed to splitA and are used to split A into T and F matrices

Details

see section 5.3.5 in Caswell (2001).

Value

Generation time. If the transition matrix is singular, then NA is returned.

Note

Previous versions required separate T and F matrices as input

Author(s)

Chris Stubben

References

Caswell, H. 2001. Matrix population models: construction, analysis, and interpretation, Second edition. Sinauer, Sunderland, Massachusetts, USA.

See Also

see fundamental.matrix and net.reproductive.rate for other age-specific traits

Examples

1
2
3
4
5
6
7
8
data(whale)
generation.time(whale)
## fertilities in last column
data(teasel)
generation.time(teasel, r=1:6, c=6)
## Plot 3 from Calathea 
data(calathea)
sapply(calathea[9:12], generation.time)

Example output

[1] 27.85079
[1] 3.145131
plot3 1982 plot3 1983 plot3 1984 plot3 1985 
  21.90916   35.15513   11.77548         NA 

popbio documentation built on May 4, 2018, 1:04 a.m.