theme_pk: Custom ggplot2 theme PK style
In kraaijenbrink/pkrf: Philip Kraaijenbrink's R functions

Custom ggplot2 theme PK style

theme_pk(
  base_size = 10,
  base_family = "",
  base_line_size = base_size/22,
  base_rect_size = base_size/22,
  alwd = 0.5,
  grid = F,
  yrot = F,
  strip = "light",
  double_border = F
)

`base_size`	base point size
`base_family`	base font family
`base_line_size`	base line size
`base_rect_size`	base rect size
`alwd`	line width used for axes, ticks and panel border
`grid`	draw no (`0`), only major ((`1`)) or major and minor grid lines (`2`)
`yrot`	rotate y axis tick labelsl 90 degrees (logical)
`strip`	Use gray facet strip with white text ("dark") or transparent strip with black text ("light")
`double_border`	Use double line width on panel border (logical). This is necessary in order to get equal line width for the ticks and border when exporting to png/pdf using `ggsave` and the (default) coordinate option `clip='on'`.