timeunit_x: How to encode x-axis time values

In vegalite: Tools to Encode Visualizations with the 'Grammar of Graphics'-Like 'Vega-Lite' 'Spec'

Description

How to encode x-axis time values

Usage

timeunit_x(vl, unit)

Arguments

vl

Vega-Lite object

unit

the property of a channel definition sets the level of specificity for a temporal field. Currently supported values are 'year', 'yearmonth', 'yearmonthday', 'yearmonthdate', 'yearday', 'yeardate', 'yearmonthdayhours' and 'yearmonthdayhoursminutes' for non-periodic time units & 'month', 'day', 'date', 'hours', 'minutes', 'seconds', 'milliseconds', 'hoursminutes', 'hoursminutesseconds', 'minutesseconds' and 'secondsmilliseconds' for periodic time units.

References

Vega-Lite Time Unit

Examples

vegalite() %>%
  cell_size(300, 300) %>%
  add_data("https://vega.github.io/vega-editor/app/data/unemployment-across-industries.json") %>%
  encode_x("date", "temporal") %>%
  encode_y("count", "quantitative", aggregate="sum") %>%
  encode_color("series", "nominal") %>%
  scale_x_time(nice="month") %>%
  scale_color_nominal(range="category20b") %>%
  axis_x(axisWidth=0, format="%Y", labelAngle=0) %>%
  axis_y(remove=TRUE) %>%
  timeunit_x("yearmonth") %>%
  mark_area(stack="normalize")

Example output

vegalite documentation built on May 2, 2019, 10:46 a.m.