recGlyph: Keim's recursive pattern algorithm data visualization

In rwoldford/glyphs: Make glyphs using pixel-oriented data visualization technique

Description

recGlyph generates a data matrix of png format or a class of "pixmap" to display color strings in an order of recursive pattern provided by Keim in the space given a vector of colors

Usage

recGlyph(col, width, height, fill = FALSE, type = c("png", "pixmap"))

Arguments

col	vector of colors
width	vector of width in each level of algorithm
height	vector of height in each level of algorithm
fill	logical value indicating whether the color strings repeat from the beginning if number of colors in col is smaller than the total number of colors to display
type	string specifying the format of output. "png" means the output is a data matrix in the png format, and "pixmap" means the output is a class of pixmap.

Value

a data matrix of png format or a class of "pixmap" that is used to plot. See pixmap, writePNG, rasterImage

Author(s)

Jiahua Liu, Wayne Oldford

References

Keim, Daniel A. 1996. "Pixel-Oriented Visualization Techniques for Exploring Very Large Data Bases." Journal of Computational and Graphical Statistics 5 (1). Taylor & Francis: 58-77.

Examples

width=c(1,6,1,12,1)
height=c(1,1,4,1,3)
myPngmat <- recGlyph(width=width, height=height)
myPngmat <- recGlyph(width=width, height=height, col = colors(), fill = TRUE)
writePNG(myPngmat, target = "myplot.png")
plot(0,type='n', xlim=c(0,1), ylim=c(0,1), axes = FALSE,xlab = "", ylab = "")
rasterImage(myPngmat,0,0,1,1)
myPixmap <- recGlyph(width=width, height=height, col = colors(), type = "pixmap")
plot(myPixmap)

rwoldford/glyphs documentation built on Nov. 14, 2020, 2:29 a.m.