Description Usage Arguments Details Author(s) See Also Examples
This function adds a horizontal bar giving the scale of the branch lengths to a plot of a phylogenetic tree on the current graphical device.
1 | add.scale.bar(x, y, length = NULL, ask = FALSE, ...)
|
x |
x location of the bar (can be left missing). |
y |
y location of the bar (can be left missing). |
length |
a numeric value giving the length of the scale bar. If none is supplied, a value is calculated from the data. |
ask |
a logical; if |
... |
further arguments to be passed to |
By default, the bar is placed in a corner of the graph depending on
the direction of the tree. Otherwise both x
and y
must
be specified (if only one is given it is ignored).
The further arguments (...
) are used to format the text. They
may be font
, cex
, col
, and so on (see examples
below, and the help page on text
).
The function locator
may be used to
determine the x
and y
arguments.
Emmanuel Paradis
plot.phylo
, axisPhylo
,
locator
1 2 3 4 5 6 7 | tr <- rtree(10)
layout(matrix(1:2, 2, 1))
plot(tr)
add.scale.bar()
plot(tr)
add.scale.bar(cex = 0.7, font = 2, col = "red")
layout(matrix(1))
|
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