imageDraw: Image plot with twilights

In slisovski/TwGeos: Basic data processing for light-level geolocation archival tags

Image plot with twilights

Description

Image plot with twilight points and ribbons

Usage

imageDraw(tagdata = NULL, twilights = NULL, offset = 0, xlim = NULL,
  mark = NULL, points.col = NULL, ribbon.col = NULL, zlim = c(0, 64),
  point.cex = 0.6)

Arguments

tagdata	a dataframe with columns Date and Light that are the sequence of sample times (as POSIXct) and light levels recorded by the tag.
twilights	dataframe of twilight times as generated by findTwilights.
offset	the starting hour for the vertical axes.
xlim	the range of dates to plot.
mark	twilights to mark with a cross
points.col	colours of twilight points
ribbon.col	colours of twilight ribbons
zlim	the range of light levels to plot.
point.cex	expansion factor for plot points.

Details

Draws a light image with twilight points or twilight ribbon. If tagdata is NULL, no image is drawn. Twilight points and ribbons are only drawn when twilight data is provided and the point or ribbon colour specifications are non NULL.

slisovski/TwGeos documentation built on Jan. 27, 2024, 10:43 a.m.