SparkLabels {ggspark}

Sparkline labels or points

Description

stat for points or labels at the start, end, max, and min values of a line. will automatically compute them from x and y aesthetics. can use either geom = "point"

Usage

stat_sparklabels(
  mapping = NULL,
  data = NULL,
  geom = "label",
  label_fun = NULL,
  position = "identity",
  show.legend = TRUE,
  inherit.aes = TRUE
)

Arguments

mapping

Set of aesthetic mappings created by aes(). If specified and inherit.aes = TRUE (the default), it is combined with the default mapping at the top level of the plot. You must supply mapping if there is no plot mapping.

data

The data to be displayed in this layer. There are three options:

If NULL, the default, the data is inherited from the plot data as specified in the call to ggplot().

A data.frame, or other object, will override the plot data. All objects will be fortified to produce a data frame. See fortify() for which variables will be created.

A function will be called with a single argument, the plot data. The return value must be a data.frame, and will be used as the layer data. A function can be created from a formula (e.g. ~ head(.x, 10)).

geom

either "point", "text", "label", "text_repel", or "label_repel"

label_fun

function to adapt labels (p. ex. round or add suffixes)

position

Position adjustment, either as a string naming the adjustment (e.g. "jitter" to use position_jitter), or the result of a call to a position adjustment function. Use the latter if you need to change the settings of the adjustment.

show.legend

logical. Should this layer be included in the legends? NA, the default, includes if any aesthetics are mapped. FALSE never includes, and TRUE always includes. It can also be a named logical vector to finely select the aesthetics to display.

inherit.aes

If FALSE, overrides the default aesthetics, rather than combining with them. This is most useful for helper functions that define both data and aesthetics and shouldn't inherit behaviour from the default plot specification, e.g. borders().

Details

This should be used in combination with 'geom_line()' in order to draw sparklines.

Aesthetics

• x

• y

References

Tufte, Edward R. (n.d.) Sparkline theory and practice https://www.edwardtufte.com/bboard/q-and-a-fetch-msg?msg_id=0001OR&topic_id=1

Examples

library(ggplot2)

ggplot(airquality, aes(Day, Wind, group = Month)) + 
  stat_interquartilerange(geom = "ribbon",
                          show.legend = FALSE) +
  geom_line() + 
  scale_y_continuous(limits = c(0, 25)) + 
  facet_grid(Month~.) +
  ggtitle("Daily wind intensity by month in NYC") +
  theme_minimal()