year_axis: Time Series Plotting Functions

In aion: Archaeological Time Series

Time Series Plotting Functions

Description

Time Series Plotting Functions

Usage

year_axis(
  side,
  at = NULL,
  format = c("a", "ka", "Ma", "Ga"),
  labels = TRUE,
  calendar = getOption("aion.last_calendar"),
  current_calendar = getOption("aion.last_calendar"),
  ...
)

Arguments

side	An integer specifying which side of the plot the axis is to be drawn on. The axis is placed as follows: 1=below, 2=left, 3=above and 4=right.
at	A numeric vector giving the points at which tick-marks are to be drawn. If NULL, tickmark locations are computed.
format	A character string specifying the prefix. It should be one of "a", "ka", "Ma" or "Ga". If TRUE, a good guess for an appropriate format is made.
labels	A logical scalar specifying whether annotations are to be made at the tickmarks, or a vector of character strings to be placed at the tickpoints.
calendar	A TimeScale object specifying the target calendar (see calendar()).
current_calendar	A TimeScale object specifying the calendar used by the last call to plot().
...	Further parameters to be passed to graphics::axis(). (e.g. graphical parameters).

Value

year_axis() is called it for its side-effects.

Author(s)

N. Frerebeau

See Also

Other plotting tools: image(), plot()

Examples

## Create a time-series of 300 observations
## Sampled every two years starting from 2000 BP
X <- series(
  object = rnorm(300),
  time = seq(2000, by = -2, length.out = 300),
  calendar = BP()
)

## Axis
plot(X, axes = FALSE, calendar = BP()) # Remove axes
year_axis(side = 1) # Same calendar as last plot
year_axis(side = 3, calendar = CE()) # Specific calendar
mtext(format(CE()), side = 3, line = 3)

## Grid
plot(X, panel.first = graphics::grid())

aion documentation built on Oct. 4, 2024, 5:07 p.m.