net.reproductive.rate {popbio} | R Documentation |
Calculates the net reproductive rate of a stage classified matrix using the dominant eigenvalue of the matrix R.
net.reproductive.rate(A, ...)
A |
projection matrix |
... |
additional items are passed to splitA
and are used to split A into T and F matrices |
see section 5.3.4 in Caswell (2001).
Net reproductive rate. If the transition matrix is singular, then NA is returned.
Previous versions required separate T and F matrices as input
Chris Stubben
Caswell, H. 2001. Matrix population models: construction, analysis, and interpretation, Second edition. Sinauer, Sunderland, Massachusetts, USA.
see fundamental.matrix
and generation.time
for other age-specific traits
data(whale) net.reproductive.rate(whale) ## fertilities in last column data(teasel) net.reproductive.rate(teasel, r=1:6, c=6) ## Plot 3 from Calathea - values are not the same as p. 105 in Caswell. data(calathea) sapply(calathea[9:12], net.reproductive.rate)