mark_tick {vegalite}

Tick mark

Description

A tick mark represents each data point as a short line. This is a useful mark for displaying the distribution of values in a field.

Usage

mark_tick(vl, orient = NULL, size = NULL, thickness = 1, opacity = NULL,
  color = NULL, fill = NULL, stroke = NULL)

Arguments

vl

Vega-Lite object

orient

the orientation of a non-stacked bar, area, and line charts. The value is either "horizontal", or "vertical" (default). For bar and tick, this determines whether the size of the bar and tick should be applied to x or y dimension. For area, this property determines the orient property of the Vega output. For line, this property determines the path order of the points in the line if path channel is not specified. For stacked charts, this is always determined by the orientation of the stack; therefore explicitly specified value will be ignored.

size

The pixel area each the point. For example: in the case of circles, the radius is determined in part by the square root of the size value.

thickness

Thickness of the tick mark. Default value: 1

opacity

0.0-1.0

color

color of the mark – either fill or stroke color based on the filled mark config.

fill

fill color. This config will be overridden by color channel’s specified or mapped values if filled is true.

stroke

stroke color. This config will be overridden by color channel’s specified or mapped values if filled is false.

References

Vega-Lite Mark spec

Examples

vegalite() %>%
  add_data("https://vega.github.io/vega-editor/app/data/cars.json") %>%
  encode_x("Horsepower", "quantitative") %>%
  encode_y("Cylinders", "ordinal") %>%
  mark_tick()