R devel - Mar 2012 - rpart package, text function, and round of class counts

I run the following code:

library(rpart)
data(kyphosis)
fit <- rpart(Kyphosis ~ ., data=kyphosis)
plot(fit)
text(fit, use.n=TRUE)

The text labels represent the count of each class at the leaf node.
Unfortunately, the numbers are rounded and in scientific notation rather
than the exact number of examples sorted by that node in each class. 

The plot is supposed to look like
http://www.statmethods.net/advstats/images/ctree.png as per
http://www.statmethods.net/advstats/cart.html.

I'm running 2.14.1 on a mac.

Can anyone verify or point out if I am doing something obviously wrong for
displaying the counts rounded and in scientific notation rather than the
true counts in each class at each node?
Thanks.

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On Sun, 4 Mar 2012, yindalon wrote:
> I run the following code:
>
> library(rpart)
> data(kyphosis)
> fit <- rpart(Kyphosis ~ ., data=kyphosis)
> plot(fit)
> text(fit, use.n=TRUE)
>
> The text labels represent the count of each class at the leaf node.
> Unfortunately, the numbers are rounded and in scientific notation rather
> than the exact number of examples sorted by that node in each class.
You probably have a getOption("digits") of 4 or lower. text.rpart uses
getOption("digits") - 3 as the default which then means only 1
significant
digit and hence it rounds and uses scientific notation. Using

text(fit, use.n = TRUE, digits = 3)

should do the trick. Maybe adding setting xpd = TRUE in addition helps in 
avoiding clipping of some labels.

Also, I would recommend to use

library("partykit")
plot(as.party(fit))

for visualization which uses a display like for the ctree() function (also 
mentioned on the web page you quote below).
> The plot is supposed to look like
> http://www.statmethods.net/advstats/images/ctree.png as per
> http://www.statmethods.net/advstats/cart.html.
>
> I'm running 2.14.1 on a mac.
>
> Can anyone verify or point out if I am doing something obviously wrong for
> displaying the counts rounded and in scientific notation rather than the
> true counts in each class at each node?
> Thanks.
>
> --
> View this message in context:
http://r.789695.n4.nabble.com/rpart-package-text-function-and-round-of-class-counts-tp4444576p4444576.html
> Sent from the R devel mailing list archive at Nabble.com.
>
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