lambda: Population growth rate
In popbio: Construction and Analysis of Matrix Population Models
lambda R Documentation
Population growth rate
Description
Calculates the population growth rate of a projection matrix
Usage
lambda(A)
Arguments
A
A projection matrix
Details
see section 4.4 in Caswell (2001)
Value
The dominant eigenvalue
Note
The built-in eigen function returns eigenvalues in
descreasing order of magnitude or modulus. The dominant eigenvalue of
imprimitive matrices with d eigenvalues of equal modulus is the one
with the largest real part (which.max(Re(eigen(A)$values))).
Author(s)
Chris Stubben
References
Caswell, H. 2001. Matrix population models: construction,
analysis, and interpretation, Second edition. Sinauer, Sunderland,
Massachusetts, USA.
See Also
eigen and pop.projection
Examples
A <- matrix(c(0,0,2,.3,0,0,0,.6,0), nrow=3,byrow=TRUE)
lambda(A)
Re(eigen(A)$values)
sapply(hudsonia, lambda)
popbio documentation built on May 29, 2024, 4:35 a.m.
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| lambda | R Documentation |
Population growth rate
Description
Calculates the population growth rate of a projection matrix
Usage
lambda(A)
Arguments
A |
A projection matrix |
Details
see section 4.4 in Caswell (2001)
Value
The dominant eigenvalue
Note
The built-in eigen function returns eigenvalues in
descreasing order of magnitude or modulus. The dominant eigenvalue of
imprimitive matrices with d eigenvalues of equal modulus is the one
with the largest real part (which.max(Re(eigen(A)$values))).
Author(s)
Chris Stubben
References
Caswell, H. 2001. Matrix population models: construction, analysis, and interpretation, Second edition. Sinauer, Sunderland, Massachusetts, USA.
See Also
eigen and pop.projection
Examples
A <- matrix(c(0,0,2,.3,0,0,0,.6,0), nrow=3,byrow=TRUE)
lambda(A)
Re(eigen(A)$values)
sapply(hudsonia, lambda)
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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