changing font size in regression tree plot

Question

library(rpart)
library(rpart.plot)
fit <- rpart(Kyphosis ~ Age + Number + Start, data = kyphosis)
prp(fit, type = 4, extra = 101, leaf.round = 1, fallen.leaves = TRUE,
    varlen = 0, tweak = 0.8)

I'm trying to get the text to fit inside the rounded squares. I tried lowering the tweak and cex values, but it appears that the rounded squares get smaller along with the text. How can I make the font size smaller?

@Bulat, I'm using RStudio, and I've tried making the plot window bigger by just dragging the borders but it's not enough to make it look nice. — Adrian, May 08 '16 at 19:29
Do you intend to save it to a file? in that case you can do `post(fit, file = "tree2.ps", title = "Regression Tree")` — Bulat, May 08 '16 at 19:32

score 4 · Accepted Answer · answered May 13 '16 at 09:10

4

Try out this graphical package instead:

library(maptree)
draw.tree(fit,cex=3)

Change cex to get different font sizes.

answered May 13 '16 at 09:10

Otto_K

347
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score 0 · Answer 2 · answered Jan 25 '17 at 09:30

0

Using the same package - rpart.plot

fancyRpartPlot(fit,cex=3)

Change cex as better suites your case, as explained by Otto_k.

answered Jan 25 '17 at 09:30

Nemesi

781
3
13
29

3

that is not the same package - that function comes from the rattle library. – calycolor Mar 12 '19 at 21:13

changing font size in regression tree plot

2 Answers2