[R] something missing from the graph of recursive partitioning

[dechao wang]

The following codes come from R example. I save its
graph as rpart.ps, but the graph did not display the
whole word, e.g. just display "bsent", not "absent" in
the most left. can you advise me how to solve it?

many thanks,

p.s, file rpart.ps is also attached.

library(rpart)
data(kyphosis)
fit <- rpart(Kyphosis ~ Age + Number + Start, data =
kyphosis)
fit2 <- rpart(Kyphosis ~ Age + Number + Start, data =
kyphosis, 
parms = list(prior = c(0.65, 0.35), split =
"information"))
postscript("rpart.ps", width=960, height=960)
par(mfrow = c(1, 2))
plot(fit)
text(fit, use.n = TRUE)
plot(fit2)
text(fit2, use.n = TRUE)
dev.off()

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