timeunit: How to encode time values

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

Description

How to encode time values

Usage

timeunit(vl, chnl = "x", unit)

timeunit_x(vl, unit)

timeunit_y(vl, unit)

Arguments

vl	Vega-Lite object
chnl	x,y
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() %>%
  view_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", stack = "normalize") %>%
  encode_color("series", "nominal") %>%
  scale_x_time_vl(nice="month") %>%
  scale_color_nominal_vl(scheme="category20b") %>%
  axis_x(format="%Y", labelAngle=0) %>%
  axis_y(remove=TRUE) %>%
  timeunit_x("yearmonth") %>%
  mark_area()

hrbrmstr/vegalite documentation built on May 17, 2019, 5:38 p.m.