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stremo (version 0.2)

Functions to help the process of learning structural equation modelling

Description

Functions to assist the process of learning structural equation modeling

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Version

Install

install.packages('stremo')

Monthly Downloads

31

Version

0.2

License

GPL

Maintainer

Gustavo Carvalho

Last Published

September 29th, 2011

Functions in stremo (0.2)

grace

Data and tentative model syntax for the paper by Grace et al. 2010.
manifests

Display the indicator (manifest) variables of a lavaanified model
is.pd

Do some basic checking to see if a matrix is positive-definite.
II

Identity matrix
LISREL

Build the 4 basic matrices of the LISREL "all-y" representation given a set of starting values.
harnik

Effects of biological factors on extinction risk in fossil bivalves.
Standard errors

Standard errors of free parameters.
boot.lavaan

Nonparametrical bootstrapping of a SEM model fit by lavaan.
RMSEA

RMSEA
P-value

Returns the p-value given a z-score.
pugesek

Bumpus house sparrow data and model.
exogenous

Display the exogenous variables of a lavaanified model
albert

Erodium paularense data and model.
laughlin

Determinants of nitrification potential in a pine forest ecosystem.
endogenous

Display the endogenous variables of a lavaanified model
latents

Display the latent variables of a lavaanified model
lvnfy

Set the ground to start analysing a structural equation model.
degrees of freedom

Number of degrees of freedom.
Residuals

Residuals of a fitted path or structural equations model.
latta

Path analysis of natural selection via survival and fecundity across contrasting environments in Avena barbata.
iterator

Minimization of a fitting function.
ML

Maximum-likelihood fitting function.
is.hermitian

Check if a matrix is Hermitian.
lamb

Effects of plant species richness and evenness on soil microbial community diversity and function.
fit.nlminb

Fit a structural equation model using nlminb.
GLS

Generalised least squares.
model.type

Displays the type of a structural equations model.
lamb2

Yield components in oat.
cor2cov

Covariance matrix from a correlation matrix.
is.within.bounds

Check if all covariances in a covariance matrix are within bounds.
mirror.tri

Place the values below or above the diagonal of a square matrix in the opposite triangle.
observed

Display the observed variables of a lavaanified model
matrix.representation

Builds the LISREL "all-y" matrix representation of a model.
Structural Matrices and Sigma

Structural and covariance matrices describing a path or latent variables model.
stiles

Fragmentation effects on remnant plant species richness.
Multivariate Normal

Random multivariate normal distribution.
Factor analysis

Factor analysis.
jumpstart

Get the starting values of the free parameters of a model.
stremo-package

Learning structural equation modeling.
sigma.hat

Calculates the sigma hat given a LISREL "all-y" matrix representation object.