[R] [R-pkgs] lavaan version 0.4-8

[Yves Rosseel]

Dear R-users,

A new version of `lavaan' (for latent variable analysis) is now 
available on CRAN. The current version of lavaan (0.4-8) can be used for 
path analysis, confirmatory factor analysis, structural equation
modeling, and growth curve modeling.

More information can be found on the website: http://lavaan.org

To get a first impression of how the 'lavaan model syntax' looks like,
below is the full R code for fitting a SEM model:

## begin R Code ##
library(lavaan)
# The industrialization and Political Democracy Example
# Bollen (1989), page 332
model <- '
    # latent variable definitions
       ind60 =~ x1 + x2 + x3
       dem60 =~ y1 + y2 + y3 + y4
       dem65 =~ y5 + y6 + y7 + y8

    # regressions
      dem60 ~ ind60
      dem65 ~ ind60 + dem60

    # residual correlations
      y1 ~~ y5
      y2 ~~ y4 + y6
      y3 ~~ y7
      y4 ~~ y8
      y6 ~~ y8
'
fit <- sem(model, data=PoliticalDemocracy)
summary(fit, fit.measures=TRUE)
## end R code ##


Please feel free to contact me directly with questions and comments.

Best,

Yves Rosseel.


-- 
Yves Rosseel -- http://www.da.ugent.be
Department of Data Analysis, Ghent University
Henri Dunantlaan 1, B-9000 Gent, Belgium

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