panel.scaleArrow: Draw a scale bar as an arrow, labelled with its length in...

In latticeExtra: Extra Graphical Utilities Based on Lattice

Description

Draw a scale bar as an arrow, labelled with its length in plot units.

Usage

panel.scaleArrow(x = unit(0:1, "npc"), y = unit(0:1, "npc"),
                 default.units = "npc",
                 digits = 0, append = "", label = NULL,
                 angle = 30, length = 0.5, unit = "char",
                 type = "open", ends = "both",
                 ...,
                 col = add.line$col, fill = col, alpha = add.line$alpha,
                 lty = add.line$lty, lwd = add.line$lwd,
                 col.text = add.text$col, alpha.text = add.text$alpha)

Arguments

x, y, default.units	coordinates of the line ends as grid units or otherwise interpreted in default.units.
digits	number of decimal places to keep for the distance measure.
append	a string to append to the distance for the label.
label	label to place on the mid point of the scale, over-riding the default.
angle, length, unit, type, ends	specification of the arrow style; see panel.arrows.
...	further arguments passed to panel.text. You will need at least the pos or adj arguments.
col, fill, alpha, lty, lwd	graphical parameters relevant to the line.
col.text, alpha.text	graphical parameters relevant to the text label. Others like cex and font can be passed though ....

Author(s)

Felix Andrews [e-mail]

See Also

panel.abline, grid.text

Examples

xyplot(EuStockMarkets) +
  layer(panel.scaleArrow(x = 0.99, append = " units",
          col = "grey", srt = 90, cex = 0.8))

Example output

Loading required package: lattice
Loading required package: RColorBrewer

latticeExtra documentation built on Sept. 19, 2020, 3:01 p.m.