R : Copyright 2004, The R Foundation for Statistical Computing
Version 2.0.1  (2004-11-15), ISBN 3-900051-07-0

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> 
>  library(aster)
> 
>  set.seed(42)
> 
>  nind <- 25
> 
>  vars <- c("l2", "l3", "f2", "f3", "h2", "h3")
>  pred <- c(0, 1, 1, 2, 3, 4)
>  fam <- c(1, 1, 1, 1, 3, 3)
>  length(pred) == length(fam)
[1] TRUE
>  nnode <- length(pred)
> 
>  famnam <- families()
>  print(famnam[fam])
[1] "bernoulli"        "bernoulli"        "bernoulli"        "bernoulli"       
[5] "non.zero.poisson" "non.zero.poisson"
> 
>  theta <- matrix(0, nind, nnode)
>  root <- matrix(1, nind, nnode)
>  x <- raster(theta, pred, fam, root)
>  dimnames(x) <- list(NULL, vars)
> 
>  data <- as.data.frame(x)
>  site <- factor(sample(LETTERS[1:4], nind, replace = TRUE))
>  foo <- rnorm(nind)
>  data <- data.frame(x, site = site, foo = foo, root = 1)
> 
>  redata <- reshape(data, varying = list(vars),
+      direction = "long", timevar = "varb", times = as.factor(vars),
+      v.names = "resp")
> 
>  out <- aster(resp ~ foo + site, pred, fam, varb, id, root, data = redata)
>  summary(out, show.graph = TRUE)

Call:
aster.formula(formula = resp ~ foo + site, pred = pred, fam = fam, 
    varvar = varb, idvar = id, root = root, data = redata)


Graphical Model:
 variable predecessor family          
 l2       root        bernoulli       
 l3       l2          bernoulli       
 f2       l2          bernoulli       
 f3       l3          bernoulli       
 h2       f2          non.zero.poisson
 h3       f3          non.zero.poisson

            Estimate Std. Error z value Pr(>|z|)
(Intercept) -0.16214    0.21876  -0.741    0.459
foo          0.09494    0.11920   0.796    0.426
siteB        0.17028    0.28481   0.598    0.550
siteC       -0.31451    0.26409  -1.191    0.234
siteD       -0.44272    0.38470  -1.151    0.250
> 
>  out <- aster(resp ~ foo + site + varb, pred, fam, varb, id, root,
+      data = redata)
>  summary(out)

Call:
aster.formula(formula = resp ~ foo + site + varb, pred = pred, 
    fam = fam, varvar = varb, idvar = id, root = root, data = redata)

            Estimate Std. Error z value Pr(>|z|)
(Intercept)  1.10940    0.99528   1.115    0.265
foo          0.07857    0.10960   0.717    0.473
siteB        0.14573    0.26619   0.547    0.584
siteC       -0.25967    0.24569  -1.057    0.291
siteD       -0.35936    0.35182  -1.021    0.307
varbf3      -0.96858    1.43012  -0.677    0.498
varbh2      -1.95067    1.60196  -1.218    0.223
varbh3      -0.99839    1.09216  -0.914    0.361
varbl2      -1.87307    1.24891  -1.500    0.134
varbl3      -1.80743    1.19680  -1.510    0.131
> 
>