R Graphical Manual

Browse All

Last data update: 2014.03.03

R: Population transition matrix

as.tmatrix

R Documentation

Population transition matrix

Description

Convert a matrix to transition matrix (class tmatrix) and display some of its properties.

Usage

as.tmatrix(x, names.st = NULL, ...)
## S3 method for class 'tmatrix'
plot(x, ...)
## S3 method for class 'tmatrix'
print(x, ...)
## S3 method for class 'tmatrix'
summary(object, ...)
## S3 method for class 'summary.tmatrix'
print(x, ...)

Arguments

`x`	For `as.tmatrix`, `x` is a square matrix,; for the plot, print and summary methods,`x` is a matrix of class `tmatrix`.
`object`	An object of class `tmatrix`, i.e, resulting from `as.tmatrix`.
`names.st`	A vector of names to rename the rows and columns of the transition matrix.
`...`	Other parameters passed to print and plot methods.

Details

The purpose of as.tmatrix is to class a transition matrix as an object of class tmatrix, allowing the use of specific methods for transition matrices.

Value

as.tmatrix returns a matrix of class tmatrix.

summary.tmatrix prints the main parameters of the transition matrix: the finite rate of increase ("lambda"), the stable stage distribution, the reproductive value and the sensitivities and elasticities matrices. This function is equivalent to the "Display" button in Ramas-EcoLab (r) software.

plot.tmatrix draw barplots of the stable stage distribution and the reproductive value and plot also a diagram of the life stage cycle.

Author(s)

Marcelino de la Cruz marcelino.delacruz@upm.es

References

Akcakaya, H. R., Burgman, M. A. and Ginzburg L.R. 1999. Applied Population Ecology. Sinauer. Caswell, H. 2003. Matrix Population Models: Construction, Analysis, and Interpretation . Sinauer.

Examples


  ## Not run: 
  data(coryphanthaA)
  coryphanthaA
  coryphanthaA <- as.tmatrix(coryphanthaA)
  summary(coryphanthaA)
  plot(coryphanthaA) 
  
## End(Not run)