can I change the position of the strip label in ggplot from the top to the bottom?
RGgplot2StripFacetR Problem Overview
I know this is not quite a data visualization issue, but the boss asked for it, so I need to figure out if it is possible.
Thanks!
R Solutions
Solution 1 - R
An answer for those searching in 2016.
As of ggplot2 2.0, the switch argument will do this for facet_grid or facet_wrap:
> By default, the labels are displayed on the top and right of the plot. If "x", the top labels will be displayed to the bottom. If "y", the right-hand side labels will be displayed to the left. Can also be set to "both".
ggplot(...) + ... + facet_grid(facets, switch="both")
As of ggplot2 2.2.0,
> Strips can now be freely positioned in facet_wrap() using the
strip.position argument (deprecates switch).
Current docs, are still at 2.1, but strip.position is documented on the dev docs.
> By default, the labels are displayed on the top of the plot. Using strip.position it is possible to place the labels on either of the four sides by setting strip.position = c("top", "bottom", "left", "right")
ggplot(...) + ... + facet_wrap(facets, strip.position="right")
Solution 2 - R
you can now use facet_wrap(~var, strip.position = "bottom"), though for some reason this results in the labels being located above the axis tick mark labels, rather than below (which I think would make more sense), as you can see from my screenshot of a small portion of my graph
If you want to have the label below, you have do to this
ggplot(zzz, aes(x = c1, y = c2)) +
facet_wrap(~ gp, scales = "free", nrow = 3, strip.position = "bottom") +
geom_point() +
theme(
aspect.ratio = 1,
strip.background = element_blank(),
strip.placement = "outside"
)
As seen here: https://github.com/tidyverse/ggplot2/issues/2622
Solution 3 - R
The answer is yes!
theme(strip.text=element_text(vjust=-10))
The number -10 is determined by the scale and units you're using in your plot.
Solution 4 - R
To follow on the use of theme:
> theme(strip.text=element_text(vjust=-10))
Be sure your labels all have the same number of carriage returns.
Label /n Facet /n One will vjust at a different rate than Label /n Facet Two.