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popdemo (version 0.1-2)

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

722

Version

0.1-2

License

GPL (>= 2)

Maintainer

Iain Stott

Last Published

January 18th, 2012

Functions in popdemo (0.1-2)

blockmatrix

Block-permute a reducible matrix
project

Project population dynamics
is.matrix_irreducible

Determine reducibility of a matrix
projection.distance

Calculate projection distance
minCS

Calculate the mininum column sum of a matrix
convergence.time

Calculate time to convergence
is.matrix_primitive

Determine primitivity of a matrix
popdemo-package

Provides tools for demographic modelling using projection matrices
tf

Calculate transfer function
S3 plot method for projections

Plot population dynamics
S3 plot method for transfer functions

Plot transfer function
Kreiss

Calculate Kreiss bounds
Cohen.cumulative

Calculate Cohen's cumulative distance
inertia.tfamatrix

Analyse transfer function of inertia
inertia

Calculate population inertia
inertia.tfa

Analyse transfer function of population inertia
reactivity

Calculate reactivity
tfa

Analyse transfer function
truelambda

Calculate simulated asymptotic growth
elas

Calculate elasticity matrix
tfsens

Calculate sensitivity using transfer functions
maxamp

Calculate maximal amplification
tfamatrix

Analyse transfer function
maxatt

Calculate maximal attenuation
R2Matlab

Convert matrices into Matlab style strings
Matlab2R

Read Matlab style matrices into R
S3 plot method for matrices of transfer functions

Plot matrices of transfer functions
inertia.tfsens

Calculate sensitivity of inertia using transfer functions
is.matrix_ergodic

Determine ergodicity of a matrix
dr

Calculate damping ratio
firststepatt

Calculate first-timestep attenuation
sens

Calculate sensitivity matrix
Keyfitz.delta

Calculate Keyfitz's delta