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popdemo (version 0.1-3)

Provides Tools For Demographic Modelling Using Projection Matrices

Description

popdemo provides a set of tools designed for modelling population demography using population projection matrix (PPM) models. The focus is mainly on indices of transient dynamics, and the use of control theory (specifically transfer functions). However, popdemo includes a number of tools focussing on other areas of demographic modelling. Some tools may prove useful to anyone working with projection matrix models of any type, or indeed matrices in general. The package is designed to build on those tools already available in popbio.

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Version

Install

install.packages('popdemo')

Monthly Downloads

517

Version

0.1-3

License

GPL (>= 2)

Maintainer

Iain Stott

Last Published

February 4th, 2012

Functions in popdemo (0.1-3)

Cohen.cumulative

Calculate Cohen's cumulative distance
tf

Calculate transfer function
tfsens

Calculate sensitivity using transfer functions
inertia.tfsens

Calculate sensitivity of inertia using transfer functions
popdemo-package

Provides tools for demographic modelling using projection matrices
tfamatrix

Analyse transfer function
dr

Calculate damping ratio
reactivity

Calculate reactivity
convergence.time

Calculate time to convergence
is.matrix_irreducible

Determine reducibility of a matrix
Tort

Desert tortoise matrix
firststepatt

Calculate first-timestep attenuation
tfa

Analyse transfer function
Kreiss

Calculate Kreiss bounds
maxamp

Calculate maximal amplification
blockmatrix

Block-permute a reducible matrix
elas

Calculate elasticity matrix
maxatt

Calculate maximal attenuation
inertia.tfamatrix

Analyse transfer function of inertia
truelambda

Calculate simulated asymptotic growth
inertia

Calculate population inertia
sens

Calculate sensitivity matrix
R2Matlab

Convert matrices into Matlab style strings
inertia.tfa

Analyse transfer function of population inertia
minCS

Calculate the mininum column sum of a matrix
Keyfitz.delta

Calculate Keyfitz's delta
projection.distance

Calculate projection distance
S3 plot method for transfer functions

Plot transfer function
S3 plot method for matrices of transfer functions

Plot matrices of transfer functions
S3 plot method for projections

Plot population dynamics
Matlab2R

Read Matlab style matrices into R
project

Project population dynamics
is.matrix_ergodic

Determine ergodicity of a matrix
is.matrix_primitive

Determine primitivity of a matrix