# text.rpart

From rpart v3.1-22
by Brian Ripley

##### Place Text on a Dendrogram

Labels the current plot of the tree dendrogram with text.

- Keywords
- tree

##### Usage

```
## S3 method for class 'rpart':
text(x, splits=TRUE, label="yval", FUN=text, all=FALSE,
pretty=NULL, digits=getOption("digits") - 3, use.n=FALSE,
fancy=FALSE, fwidth=0.8, fheight=0.8, ...)
```

##### Arguments

- x
- fitted model object of class
`rpart`

. This is assumed to be the result of some function that produces an object with the same named components as that returned by the`rpart`

function. - splits
- logical flag. If
`TRUE`

(default), then the splits in the tree are labeled with the criterion for the split. - label
- a column name of
`x$frame`

; values of this will label the nodes. For the`"class"`

method,`label="yval"`

results in the factor levels being used,`"yprob"`

results in the probability of the winning factor lev - FUN
- the name of a labeling function, e.g.
`text`

. - all
- Logical. If
`TRUE`

, all nodes are labeled, otherwise just terminal nodes. - pretty
- an integer denoting the extent to which factor levels in split labels
will be abbreviated. A value of (0) signifies no abbreviation. A
`NULL`

, the default, signifies using elements of letters to represent the different factor levels. - digits
- number of significant digits to include in numerical labels.
- use.n
- Logical. If
`TRUE`

, adds to label (#events level1/ #events level2/etc. for`class`

,`n`

for`anova`

, and #events/n for`poisson`

and`exp`

). - fancy
- Logical. If
`TRUE`

, nodes are represented by ellipses (interior nodes) and rectangles (leaves) and labeled by`yval`

. The edges connecting the nodes are labeled by left and right splits. - fwidth
- Relates to option
`fancy`

and the width of the ellipses and rectangles. If`fwidth < 1`

then it is a scaling factor (default = 0.8). If`fwidth > 1`

then it representes the number of character widths (for current - fheight
- Relates to option
`fancy`

and the height of the ellipses and rectangles. If`fheight <1< code=""> then it is a scaling factor (default = 0.8). If`

`fheight > 1`

then it represents the number of character heights (for current - ...
- Graphical parameters may also be supplied as arguments to this
function (see
`par`

). As labels often extend outside the plot region it can be helpful to specify`xpd = TRUE`

.

##### Side Effects

the current plot of a tree dendrogram is labeled.

##### See Also

##### Examples

```
freen.tr <- rpart(y ~ ., freeny)
plot(freen.tr)
text(freen.tr, use.n=TRUE, all=TRUE)
```

*Documentation reproduced from package rpart, version 3.1-22, License: use under GPL2, or see file LICENCE*

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