type_ribbon – tinyplot

Ribbon and area plot types

Description

Type constructor functions for producing polygon ribbons, which define a y interval (usually spanning from ymin to ymax) for each x value. Area plots are a special case of ribbon plot where ymin is set to 0 and ymax is set to y.

Usage

type_area()

type_ribbon(alpha = NULL)

Arguments

alpha numeric value between 0 and 1 specifying the opacity of ribbon shading If no alpha value is provided, then will default to tpar(“ribbon.alpha”) (i.e., probably 0.2 unless this has been overridden by the user in their global settings.)

Examples

library("tinyplot")

x = 1:100/10
y = sin(x)

#
## Ribbon plots

# "ribbon" convenience string
tinyplot(x = x, ymin = y-1, ymax = y+1, type = "ribbon")

# Same result with type_ribbon()
tinyplot(x = x, ymin = y-1, ymax = y+1, type = type_ribbon())

# y will be added as a line if it is specified
tinyplot(x = x, y = y, ymin = y-1, ymax = y+1, type = "ribbon")

#
## Area plots
  
# "area" type convenience string
tinyplot(x, y, type = "area")

# Same result with type_area()
tinyplot(x, y, type = type_area())

# Area plots are often used for time series charts
tinyplot(AirPassengers, type = "area")