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sesem (version 1.0.1)

Spatially explicit structural equation modeling

Description

Structural equation modeling (SEM) is a powerful statistical approach for the testing of networks of direct and indirect theoretical causal relationships in complex datasets with intercorrelated dependent and independent variables. Here we implement a simple method for spatially explicit SEM (SE-SEM) based on the analysis of variance covariance matrices calculated across a range of lag distances. This method provides readily interpretable plots of the change in path coefficients across scale.

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Version

Install

install.packages('sesem')

Monthly Downloads

408

Version

1.0.1

License

GPL (>= 2)

Maintainer

Eric Lamb

Last Published

March 4th, 2014

Functions in sesem (1.0.1)

plotmodelfit

Function to plot model fit indices for spatial SEM analyses
truelove

Truelove lowland transect dataset
plotpath

Function to plot spatial SEM results for individual paths
runModels

Run a spatial SEM analysis
sesem-package

Spatial structural equation modeling (SESEM)
plotbin

Function to plot the distribution of lag distance bin sizes
plantcomp

Plant Competition dataset
truelove_covar

Truelove lowland example covariances
bin.results

Extract results for a particular bin
make.bin

Function to make lag distance bins
truelove_results

Truelove lowland example sesem output
alexfiord

Alexandra Fiord transect dataset
gam.path

Prints and displays spatial sem results using gam models
avg.modindices

Function to display averaged modification indices for a spatial SEM
calc.dist

Calculate intersample distances for a set of X-Y coordinates
bin.rsquare

Extract r-square values for dependant variables a spatial SEM for a particular lag distance bin
make.covar

Function to calculate covariance matrices for a set of lag distance bins
modelsummary

Function to extract and display basic summary information for a spatial SEM analysis