word_cloud_grob: A simple grob for the word cloud

In simplifyEnrichment: Simplify Functional Enrichment Results

Description

A simple grob for the word cloud

Usage

word_cloud_grob(text, fontsize,
    line_space = unit(4, "pt"), word_space = unit(4, "pt"), max_width = unit(80, "mm"),
    col = function(fs) circlize::rand_color(length(fs), luminosity = "dark"),
    test = FALSE)

Arguments

text	A vector of words.
fontsize	The corresponding font size. With the frequency of the words known, scale_fontsize can be used to linearly interpolate frequencies to font sizes.
line_space	Space between lines. The value can be a unit object or a numeric scalar which is measured in mm.
word_space	Space between words. The value can be a unit object or a numeric scalar which is measured in mm.
max_width	The maximal width of the viewport to put the word cloud. The value can be a unit object or a numeric scalar which is measured in mm. Note this might be larger than the final width of the returned grob object.
col	Colors for the words. The value can be a vector, in numeric or character, which should have the same length as text. Or it is a self-defined function that takes the font size vector as the only argument. The function should return a color vector. See Examples.
test	Internally used. It basically adds borders to the words and the viewport.

Value

A grob object. The width and height of the grob can be get by grobWidth and grobHeight.

Examples

# very old R versions do not have strrep() function
if(!exists("strrep")) {
    strrep = function(x, i) paste(rep(x, i), collapse = "")
}
words = sapply(1:30, function(x) strrep(sample(letters, 1), sample(3:10, 1)))
require(grid)
gb = word_cloud_grob(words, fontsize = runif(30, min = 5, max = 30), 
    max_width = 100)
grid.newpage(); grid.draw(gb)

# color as a single scalar
gb = word_cloud_grob(words, fontsize = runif(30, min = 5, max = 30), 
    max_width = 100, col = 1)
grid.newpage(); grid.draw(gb)

# color as a vector
gb = word_cloud_grob(words, fontsize = runif(30, min = 5, max = 30), 
    max_width = 100, col = 1:30)
grid.newpage(); grid.draw(gb)

# color as a function
require(circlize)
col_fun = colorRamp2(c(5, 17, 30), c("blue", "black", "red"))
gb = word_cloud_grob(words, fontsize = runif(30, min = 5, max = 30), 
    max_width = 100, col = function(fs) col_fun(fs))
grid.newpage(); grid.draw(gb)

simplifyEnrichment documentation built on Nov. 8, 2020, 5:07 p.m.