```
data(learning.test)
res = gs(learning.test)
plot(res)
## highlight node B and related arcs.
plot(res, highlight = "B")
## highlight B and its Markov blanket.
plot(res, highlight = c("B", mb(res, "B")))
## a more compact plot.
par(oma = rep(0, 4), mar = rep(0, 4), mai = rep(0, 4),
plt = c(0.06, 0.94, 0.12, 0.88))
plot(res)
```

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