type_summary: Plot summary values of 'y' at unique values of 'x'

In tinyplot: Lightweight Extension of the Base R Graphics System

Plot summary values of y at unique values of x

Description

Applies a summary function to y along unique values of x. For example, plot the mean y value for each x value. Internally, type_summary() applies a thin wrapper around ave and then passes the result to type_lines for drawing.

Usage

type_summary(fun = mean, ...)

Arguments

fun	summarizing function. Should be compatible with ave. Defaults to mean.
...	Additional arguments are passed to the lines() function, ex: type="p", col="pink".

See Also

ave which performs the summarizing (averaging) behind the scenes.

Examples

# Plot the mean chick weight over time
tinyplot(weight ~ Time, data = ChickWeight, type = "summary")

# Note: "mean" is the default function, so these are also equivalent:
# tinyplot(weight ~ Time, data = ChickWeight, type = type_summary())
# tinyplot(weight ~ Time, data = ChickWeight, type = type_summary(mean))

# Plot the median instead
tinyplot(weight ~ Time, data = ChickWeight, type = type_summary(median))

# Works with groups and/or facets too
tinyplot(weight ~ Time | Diet, facet = "by", data = ChickWeight, type = "summary")

# Custom/complex function example
tinyplot(
  weight ~ Time | Diet, facet = "by", data = ChickWeight,
  type = type_summary(function(y) quantile(y, probs = 0.9)/max(y))
)

tinyplot documentation built on Nov. 5, 2025, 7:37 p.m.