## 28 Feb 2012

### Apprentice Piece with Lattice Graphs

Lattice graphs can be quite tedious to learn. I don't use them too often and  when I need them I usually have to dig deep into the archives for details on the parameter details.
The here presented example may serve as a welcome template for the usage of panel functions, panel ordering, for drawing of lattice keys, etc.

(Also, check this resource with examples by the lattice-author).

```library(lattice)
header = T, sep = ";")
mypch <- rep(21, 3)
mycol <- c(rgb(0.2, 0.8, 0.9), rgb(0.8, 0.2, 0.9), rgb(0.9, 0.2, 0.2))

stripplot(mean ~ group1 | item_parc, groups = group2, data = df,
type = c("a", "p"), strip = strip.custom(strip.names = c(F, T)),
ylab = "Score-Mittelwert", layout = c(2, 4),
scales = list(y = list(cex = 0.9),
x = list(cex = 1.1, labels = c("mĂ¤nnl.", "weibl."),
tck = c(1, 0))),
par.strip.text = list(cex = 0.9),
panel = function(...) {
panel.stripplot(..., col = mycol, pch = mypch, fill = mycol)
},
index.cond = list(c(7,8,5,6,3,4,1,2)),
key = list(space = "bottom", text = list(c("Alter < 35 J.",
"Alter 35-50 J.",
"Alter > 50 J.")),
points = list(col = mycol, cex = 0.8, pch = mypch, fill = mycol),
rep = F))
```