View source: R/guide_prism_offset_minor.R
guide_prism_offset_minor | R Documentation |
This guide draws the axis only as wide as the outermost tick marks, similar to offset axes from Prism. It also adds minor ticks.
guide_prism_offset_minor( title = waiver(), check.overlap = FALSE, angle = NULL, n.dodge = 1, order = 0, position = waiver() )
title |
A character string or expression indicating a title of guide.
If |
check.overlap |
silently remove overlapping labels, (recursively) prioritizing the first, last, and middle labels. |
angle |
Compared to setting the angle in |
n.dodge |
The number of rows (for vertical axes) or columns (for horizontal axes) that should be used to render the labels. This is useful for displaying labels that would otherwise overlap. |
order |
Used to determine the order of the guides (left-to-right, top-to-bottom), if more than one guide must be drawn at the same location. |
position |
Where this guide should be drawn: one of top, bottom, left, or right. |
Control the length of the axis by adjusting the breaks
argument in
scale_(x|y)_continuous()
or scale_(x|y)_discrete()
. Similarly,
the number of minor ticks can be changed using the minor_breaks
argument.
Control the length of minor ticks by setting prism.ticks.length
to
a unit
object using theme
,
for example: prism.ticks.length = unit(2, "pt")
. The major tick
lengths are adjusted using the standard axis.ticks.length
.
Returns a prism_offset_minor guide class object.
library(ggplot2) ## base plot base <- ggplot(mtcars, aes(x = wt, y = mpg)) + geom_point() + theme(axis.line = element_line(colour = "black")) ## add minor ticks to x and y axes base + scale_x_continuous( limits = c(0, 6), guide = "prism_offset_minor" ) + scale_y_continuous( limits = c(10, 35), guide = "prism_offset_minor" ) ## you can also use the guides function to add minor ticks base + guides(x = "prism_offset_minor", y = "prism_offset_minor") ## adjust number of minor ticks by adjusting minor breaks base + scale_x_continuous( limits = c(0, 6), minor_breaks = seq(0, 6, 0.5), guide = "prism_offset_minor" ) + scale_y_continuous( limits = c(10, 35), minor_breaks = seq(10, 35, 1.25), guide = "prism_offset_minor" ) ## adjust the length of major ticks with the usual axis.ticks.length element base + scale_x_continuous( limits = c(0, 6), minor_breaks = seq(0, 6, 0.5), guide = "prism_offset_minor" ) + scale_y_continuous( limits = c(10, 35), minor_breaks = seq(10, 35, 1.25), guide = "prism_offset_minor" ) + theme( axis.ticks.length = unit(10, "pt") ) ## adjust the length of minor ticks with a new prism.ticks.length element base + scale_x_continuous( limits = c(0, 6), minor_breaks = seq(0, 6, 0.5), guide = "prism_offset_minor" ) + scale_y_continuous( limits = c(10, 35), minor_breaks = seq(10, 35, 1.25), guide = "prism_offset_minor" ) + theme( axis.ticks.length = unit(10, "pt"), prism.ticks.length = unit(5, "pt") ) ## to get log10 minor ticks just use a log10 scale and set the minor breaks ggplot(msleep, aes(bodywt, brainwt)) + geom_point(na.rm = TRUE) + scale_x_log10(limits = c(1e0, 1e4), minor_breaks = rep(1:9, 4)*(10^rep(0:3, each = 9)), guide = "prism_offset_minor") + theme(axis.line = element_line(colour = "black")) ## change colour and tick length with the usual elements base + scale_x_continuous( limits = c(0, 6), minor_breaks = seq(0, 6, 0.5), guide = "prism_offset_minor" ) + scale_y_continuous( limits = c(10, 35), minor_breaks = seq(10, 35, 1.25), guide = "prism_offset_minor" ) + theme( axis.ticks.length = unit(10, "pt"), prism.ticks.length = unit(5, "pt"), axis.ticks = element_line(colour = "red"), axis.line = element_line(colour = "blue") )
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