Label with mathematical annotations
label_parse() produces expression from strings by parsing them;
label_math() constructs expressions by replacing the pronoun .x
with each string.
label_parse() label_math(expr = 10^.x, format = force) parse_format() math_format(expr = 10^.x, format = force)
expr |
expression to use |
format |
another format function to apply prior to mathematical transformation - this makes it easier to use floating point numbers in mathematical expressions. |
All label_() functions return a "labelling" function, i.e. a function that
takes a vector x and returns a character vector of length(x) giving a
label for each input value.
Labelling functions are designed to be used with the labels argument of
ggplot2 scales. The examples demonstrate their use with x scales, but
they work similarly for all scales, including those that generate legends
rather than axes.
parse_format() and math_format() was retired; please use
label_parse() and label_math() instead.
plotmath for the details of mathematical formatting in R.
Other labels for continuous scales:
label_bytes(),
label_dollar(),
label_number_auto(),
label_number_si(),
label_ordinal(),
label_percent(),
label_pvalue(),
label_scientific()
Other labels for discrete scales:
label_wrap()
# Use label_parse() with discrete scales
greek <- c("alpha", "beta", "gamma")
demo_discrete(greek)
demo_discrete(greek, labels = label_parse())
# Use label_math() with continuous scales
demo_continuous(c(1, 5))
demo_continuous(c(1, 5), labels = label_math(alpha[.x]))Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.