lollipop: Lollipop chart

In modEvA: Model Evaluation and Analysis

Lollipop chart

Description

This function creates a lollipop chart from a (optionally named) numeric vector.

Usage

  lollipop(x, names = NULL, ymin = 0, sticks = TRUE, col = "royalblue",
  grid = TRUE, cex = 1, cex.axis = 1, las = 2, ...)

Arguments

x	a numeric vector.
names	a vector of the same length as 'x' with the names to be plotted below the lollipops. If this argument is left NULL and 'x' has names, then these will be used.
ymin	numeric value for the lower limit of the y axis. The default is zero. If set to NA, the minimum of 'x' will be used.
sticks	logical value indicating whether the sticks of the lollipops should be drawn. The default is TRUE.
col	colour for the lollipops.
grid	logical, whether or not to add a grid to the plot. The default is TRUE.
cex	numeric value indicating the size of the lollipops. Will be passed as 'cex' to 'points' and as 'lwd' to 'arrows' (the lines or lollipop sticks).
cex.axis	numeric value indicating the size of the x and y axis labels.
las	argument to pass to par indicating the orientation of the axis labels.
...	additional arguments that can be used for the plot, e.g. 'main'.

Details

According to modern data viz recommendations, lollipop charts are generally a better alternative to bar charts, as they reduce the visual distortion caused by the length of the bars, making it easier to compare the values.

Value

This function produces a lollipop chart of the values in 'x'.

Author(s)

A. Marcia Barbosa

See Also

barplot

Examples

lollipop(mtcars[,1], names = rownames(mtcars), las = 2, ylab = names(mtcars)[1],
cex.axis = 0.6, main = "Lollipop chart")

lollipop(mtcars[,1], names = rownames(mtcars), las = 2, ylab = names(mtcars)[1],
cex.axis = 0.6, main = "Lollipop chart", ymin = NA)

modEvA documentation built on Oct. 30, 2024, 1:06 a.m.