How to Use Themes
Timothée Giraud
2024-04-26
Source:vignettes/web_only/how_to_use_themes.Rmd
how_to_use_themes.Rmdmf_theme() sets a map theme. A theme is
a set of graphical parameters that are applied to maps created with
mapsf. These parameters are the figure margins, background
and foreground colors and mf_title() options.
mapsf offers some builtin themes. It’s possible to modify
an existing theme or to start a theme from scratch. Themes are
persistent across maps produced by mapsf (e.g. they survive
a dev.off() call).
Builtin themes
Here are the builtin themes. We have added a grey background color to
make the margins more visible.
The following table displays the parameters of these themes.
| bg | fg | mar | tab | pos | inner | line | cex | font | |
|---|---|---|---|---|---|---|---|---|---|
| default | #f7f7f7 | #333333 | c(0.5, 0.5, 1.7, 0.5) | TRUE | left | FALSE | 1.2 | 1 | 1 |
| ink | #FFDEAD | #0000FF | c(0, 0, 1.2, 0) | FALSE | left | FALSE | 1.2 | 0.9 | 2 |
| dark | #2E3947 | #7E848C | c(0.5, 0.5, 2, 0.5) | FALSE | left | FALSE | 1.5 | 1 | 1 |
| agolalight | #EDF4F5 | #82888A | c(0, 0, 2, 0) | FALSE | left | FALSE | 2 | 1.5 | 3 |
| candy | #FDFCFE | #6B1767 | c(0, 0, 2, 0) | FALSE | center | FALSE | 2 | 1.5 | 2 |
| darkula | #232525 | #A9B7C6 | c(0.5, 0.5, 0.5, 0.5) | TRUE | right | TRUE | 1.5 | 1 | 4 |
| iceberg | #0B0E0E | #BDD6DB | c(0.5, 0.5, 0.5, 0.5) | TRUE | right | TRUE | 1.5 | 1 | 4 |
| green | #1B1D16 | #D7FF68 | c(0.5, 0.5, 2, 0.5) | FALSE | center | FALSE | 1.5 | 1 | 2 |
| nevermind | #4DB8DA | #121725 | c(2, 2, 3.5, 2) | FALSE | center | FALSE | 1.5 | 1.4 | 1 |
| jsk | #ffdc11 | #0c973c | c(0, 0, 1.5, 0) | FALSE | left | FALSE | 1.5 | 1 | 2 |
| barcelona | #160808 | #d73e23 | c(0, 0, 1.2, 0) | TRUE | left | FALSE | 1.2 | 1 | 2 |
How to modify an existing theme
It is possible to modify an existing theme. In this example we use the “default” theme and modify some title parameters.
library(mapsf)
mtq <- mf_get_mtq()
mf_theme("default", tab = FALSE, font = 4)
mf_map(mtq)
mf_title('Mofified "default" theme')
How to create a new theme
It is possible to create a new theme.
mf_theme(
bg = "lightblue", fg = "tomato1", mar = c(0, 2, 0, 2),
tab = TRUE, inner = TRUE, line = 1.3, pos = "center",
cex = 1.1, font = 3
)
mf_map(mtq)
mf_title("New theme")
It is also possible to assign a theme to a variable.
blue_theme <- mf_theme("dark", bg = "lightblue")
green_theme <- mf_theme("default", bg = "lightgreen")
mf_theme(blue_theme)
mf_map(mtq)
mf_title("Blue Theme")
