ggplot2 labeller function for plotmath labels

ggplot2 labeller function for plotmath labels. To be used in ggplot2 scale_*_ functions as the label argument.

label_parse(labels)

Arguments

labels	character vector of labels to be parsed

Value

a list of expressions

Details

It is useful when breaks are plotmath-ready character vectors. This function correctly formats them in order to be parsed and displayed as expressions.

Examples

df <- data.frame(
   var = c('x[1]', 'x[2]', 'x[3]', 'alpha'),
   value = c(1,2,3,4)
)

library(ggplot2)

ggplot(df) +
   geom_point(aes(x = var, y = value)) +
   scale_x_discrete(label = label_parse)