guide_legends {ggplot2} | R Documentation |
Build legends, merging where possible
guide_legends(scales, layers, default_mapping, theme)
scales |
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layers |
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default_mapping |
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theme |
A list of grobs
Hadley Wickham <h.wickham@gmail.com>
theme_update(legend.background = theme_rect(size = 0.2)) qplot(mpg, wt, data = mtcars) qplot(mpg, wt, data = mtcars, colour = cyl) # Legend with should expand to fit name qplot(mpg, wt, data = mtcars, colour = factor(cyl)) qplot(mpg, wt, data = mtcars, colour = cyl) + opts(legend.position = c(0.5, 0.5), legend.background = theme_rect(fill = "white", col = NA)) mtcars$cyl2 <- factor(mtcars$cyl, labels = c("a", "loooooooooooong", "two\nlines")) qplot(mpg, wt, data = mtcars, colour = cyl2) theme_set(theme_grey())