How to use italics for facet labels in ggplot2?
ggplot2, r
Solution
Something along these lines should work:
... + theme(strip.text = element_text(face = "italic"))
See the docs for more detail about `theme()`.
Problem
I am trying to use italics for facet names in ggplot2. I am first ordering and renaming the facets. I have come across a potential solution, but this requires `labeller=label_parsed` and I am using `labeller=name_labeller` to rename my facets. In the following example, I would like the facet names "one" "two" "three" "four" and "five" to be italicized. Here is an example dataframe: ``` structure(list(Names = c(1L, 1L, 2L, 2L, 3L, 3L, 4L, 4L, 5L, 5L, 6L, 6L, 7L, 7L, 8L, 8L, 9L, 9L, 10L, 10L), Other = c(5L, 3L, 2L, 6L, 5L, 4L, 5L, 4L, 5L, 3L, 2L, 6L, 5L, 4L, 5L, 4L, 4L, 5L, 3L, 2L), X = c(0L, 10L, 0L, 10L, 0L, 10L, 0L, 10L, 0L, 10L, 0L, 10L, 0L, 10L, 0L, 10L, 0L, 10L, 0L, 10L), Y = c(0L, 10L, 0L, 10L, 0L, 10L, 0L, 10L, 0L, 10L, 0L, 10L, 0L, 10L, 0L, 10L, 0L, 10L, 0L, 10L)), .Names = c("Names", "Other", "X", "Y"), class = "data.frame", row.names = c(NA, -20L)) ``` and the code to produce the plot is ``` library(ggplot2) library(grid) vplayout <- function(x, y) viewport(layout.pos.row = x, layout.pos.col = y) facets <- c("1", "2", "3", "4", "5") names <- list( '1'="one", '2'="two", '3'="three", '4'="four", '5'="five" ) name_labeller <- function(variable,value){ return(names[value]) } ggplot(FacetTestData[FacetTestData$Names %in% facets,], aes(y = Y, x = X, group = Names)) + geom_point(shape = 21, size=3) + scale_fill_manual(values=c("gray90","gray40")) + geom_smooth(method="lm", se= FALSE, size = 1) + scale_color_manual(values=c("black","black")) + geom_smooth(method = 'lm', size = 1, colour = 'red', se = FALSE) + facet_grid(Names ~ ., labeller=name_labeller) ``` The following code appears to give italics attributes to the list `names` ``` levels(names) <- c("italic('one')", "italic('two')", "italic('three')", "italic('four')", "italic('five')") ``` but I can't quite figure out how to make this work with `facet_grid()`. Does anyone know how I can do this?