Axis labeling

Functions for positioning tick labels on axes

Details

Package:	labeling
Type:	Package
Version:	0.4.3
Date:	2023-08-29
License:	Unlimited
LazyLoad:	yes

Implements a number of axis labeling schemes, including those compared in An Extension of Wilkinson's Algorithm for Positioning Tick Labels on Axes by Talbot, Lin, and Hanrahan, InfoVis 2010.

Author

Justin Talbot [email protected]

References

Heckbert, P. S. (1990) Nice numbers for graph labels, Graphics Gems I, Academic Press Professional, Inc. Wilkinson, L. (2005) The Grammar of Graphics, Springer-Verlag New York, Inc. Talbot, J., Lin, S., Hanrahan, P. (2010) An Extension of Wilkinson's Algorithm for Positioning Tick Labels on Axes, InfoVis 2010.

See also

extended, wilkinson, heckbert, rpretty, gnuplot, matplotlib, nelder, sparks, thayer, pretty

Examples

heckbert(8.1, 14.1, 4)  # 5 10 15
#> [1]  5 10 15
wilkinson(8.1, 14.1, 4)  # 8 9 10 11 12 13 14 15
#> [1]  8  9 10 11 12 13 14 15
extended(8.1, 14.1, 4)  # 8 10 12 14
#> [1]  8 10 12 14
# When plotting, extend the plot range to include the labeling
# Should probably have a helper function to make this easier
data(iris)
x <- iris$Sepal.Width
y <- iris$Sepal.Length
xl <- extended(min(x), max(x), 6)
yl <- extended(min(y), max(y), 6)
plot(x, y,
    xlim=c(min(x,xl),max(x,xl)),
    ylim=c(min(y,yl),max(y,yl)),
    axes=FALSE, main="Extended labeling")
axis(1, at=xl)
axis(2, at=yl)