Font size for data labels in Ipea graphics

Converts a font size in points (pt) into the size argument/aesthetic (in mm) expected by ggplot2::geom_text(), ggplot2::geom_label() and similar geoms. ggplot2 specifies text size for geoms in mm and internally converts it to points by multiplying by 2.845276 (72.27/25.4); this helper performs the inverse conversion so that labels are rendered at an exact point size.

Usage

ipea_label_size(pt = 6)

Arguments

pt

Numeric. Desired font size in points. Defaults to 6, the size used by the editorial guidelines of the Institute for Applied Economic Research (Ipea) for labels drawn over data (e.g. values on bars or lines). See https://www.ipea.gov.br/manualeditorial/padroes/padroes-grafico-visuais/ilustracoes-pi.html.

Value

A numeric value (in mm) to be passed to the size argument/aesthetic of ggplot2::geom_text(), ggplot2::geom_label() or similar geoms.

See also

Other ggplot2 theme functions: ipea_contrast_color(), scale_color_ipea(), scale_fill_ipea(), theme_ipea()

Examples

library(ggplot2)
ggplot(mtcars[1:5, ], aes(hp, mpg, label = round(mpg))) +
  geom_text(size = ipea_label_size(), colour = "black") +
  theme_ipea()