Fitting piecewise structural equation models
psem is used to unite a list of structural equations into a single
structural equation model.
psem(...)
... |
A list of structural equations |
psem takes a list of structural equations, which can be model objects
of classes: lm, glm, gls, pgls, sarlm, lme, glmmPQL, lmerMod,
lmerModLmerTest, glmerMod.
It also takes objects of class formula, formula.cerror, corresponding
to additional variables to be included in the tests of directed separation
(X ~ 1) or correlated errors (X1 %~~% X2).
The function optionally accepts data objects of classes: matrix,
data.frame, SpatialPointsDataFrame, comparative.data, or these are derived
internally from the structural equations.
Returns an object of class psem
Jon Lefcheck <lefcheckj@si.edu>
mod <- psem( lm(rich ~ cover, data = keeley), lm(cover ~ firesev, data = keeley), lm(firesev ~ age, data = keeley), data = keeley ) summary(mod)
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