Format taxon labels with species names in italic

Returns plotmath expressions that render binomial or trinomial species names (labels containing a space) in italic, leaving single-word labels (genus, family, etc.) unchanged. Intended as a `labels` formatter for discrete ggplot2 scales, or as a standalone helper.

Uses plotmath `italic()` expressions instead of markdown, so no `ggtext::element_markdown()` theme element is required. This makes the function compatible with any ggplot2 theme, including complete themes such as [theme_idest()].

Usage

label_italic_species(x)

Arguments

x

A character vector of taxon labels.

Value

A list of plotmath expressions (for species names) and plain character strings (for non-species labels), suitable for use as `labels` in [ggplot2::scale_x_discrete()] or [ggplot2::scale_y_discrete()].

See also

[scale_x_italic_species()], [scale_y_italic_species()]

Author

Adrien Taudiere

Examples

label_italic_species(c("Russula nigricans", "Amanita", "Boletus edulis"))
#> [[1]]
#> italic("Russula nigricans")
#> 
#> [[2]]
#> [1] "Amanita"
#> 
#> [[3]]
#> italic("Boletus edulis")
#>