cloud {snippets}R Documentation

Word cloud (aka tag cloud) plot

Description

cloud creates a siple word cloud plot

Usage

cloud(w, col, yspace=1.3, xspace=0.01, minh=0, ...)

Arguments

w

named weights - the acutal data to display. Names are used as tags, actual weight is used for the size. Note that plotting an unnamed vector results in an empty plot.

col

color for the tags.

yspace

space between lines as a multiple of the text height.

xspace

space (padding) between tags (in native coordinates).

minh

minimal height of a line.

...

optional arguments, currently ignored.

Details

The coordinates of the plot are [0, 1] in both x and y. The plot is created by starting in the upper left, proceedeing from left to right and top to bottom. The algorithm used is simply filling up

Note that resizing a world could usually destroys its properties. You'll have to re-run cloud after resizing, because it relies on exact extents of the text.

Value

Invisible TRUE.

Examples

# a really silly one
words <- c(apple=10, pie=14, orange=5, fruit=4)
cloud(words)

# or with more words - take the license for example
r <- paste(readLines(file.path(R.home(),"COPYING")), collapse=' ')
r <- gsub("[\f\t.,;:`'\\\"\\(\\)<>]+", " ", r)
w <- tolower(strsplit(r, " +")[[1]])
cloud(sqrt(table(w)))

# remove infrequent words
wt <- table(w)
wt <- log(wt[wt > 8])
cloud(wt, col = col.br(wt, fit=TRUE))

[Package snippets version 0.1-0 Index]