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popdemo (version 0.1-1)

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

0.1-1

License

GPL (>= 2)

Maintainer

Iain Stott

Last Published

December 19th, 2011

Functions in popdemo (0.1-1)

reactivity

Calculate reactivity
convergence.time

Calculate time to convergence
tf

Calculate transfer function
S3 plot method for transfer functions

Plot transfer function
elas

Calculate elasticity matrix
project

Project population dynamics
S3 plot method for matrices of transfer functions

Plot matrices of transfer functions
tfsens

Calculate sensitivity using transfer functions
inertia.tfa

Analyse transfer function of population inertia
truelambda

Calculate simulated asymptotic growth
firststepatt

Calculate first-timestep attenuation
blockmatrix

Block-permute a reducible matrix
tfamatrix

Analyse transfer function
R2Matlab

Convert matrices into Matlab style strings
S3 plot method for projections

Plot population dynamics
popdemo-package

Provides tools for demographic modelling using projection matrices
Keyfitz.delta

Calculate Keyfitz's delta
maxatt

Calculate maximal attenuation
inertia

Calculate population inertia
sens

Calculate sensitivity matrix
Matlab2R

Read Matlab style matrices into R
minCS

Calculate the mininum column sum of a matrix
dr

Calculate damping ratio
Cohen.cumulative

Calculate Cohen's cumulative distance
tfa

Analyse transfer function
is.matrix_irreducible

Determine reducibility of a matrix
Kreiss

Calculate Kreiss bounds
is.matrix_ergodic

Determine ergodicity of a matrix
projection.distance

Calculate projection distance
is.matrix_primitive

Determine primitivity of a matrix
inertia.tfamatrix

Analyse transfer function of inertia
maxamp

Calculate maximal amplification
inertia.tfsens

Calculate sensitivity of inertia using transfer functions