Many sparklines at once

Stack one sparkline per series, with its name on the left and final value on the right. Each series has its own vertical scale.

Usage

sparklines(
  data,
  x,
  y,
  group,
  band = c(0.25, 0.75),
  band_fill = "grey90",
  extremes = TRUE,
  label = TRUE,
  accuracy = 0.1,
  big.mark = ",",
  colour = "grey15",
  linewidth = 0.3
)

Arguments

data

A data frame.

x, y, group

Bare column names for position, value and series.

band, band_fill, colour, linewidth, accuracy, big.mark

As in sparkline().

extremes

Logical. Mark each series' minimum and maximum?

label

Logical. Print each series' final value at the right?

Value

A ggplot object.

Details

This is useful for comparing patterns over time. To compare levels across series on a shared scale, use facet_tufte().

Examples

set.seed(1)
d <- data.frame(
  t = rep(1:40, 4),
  v = c(cumsum(rnorm(40)), cumsum(rnorm(40)), cumsum(rnorm(40)),
        cumsum(rnorm(40))),
  series = rep(c("Wheat", "Maize", "Rice", "Barley"), each = 40)
)
sparklines(d, t, v, series)