View source: R/fct_reorder_within.R
fct_reorder_within | R Documentation |
This function was copied word for word from David Robinson's Personal R Package (https://github.com/dgrtwo/drlib)
Reorder a column before plotting with faceting, such that the values are ordered
within each facet. This requires two functions: reorder_within
applied to
the column, then either scale_x_reordered
or scale_y_reordered
added
to the plot.
This is implemented as a bit of a hack: it appends ___ and then the facet
at the end of each string.
fct_reorder_within(x, by, within, fun = mean, sep = "___", ...)
scale_x_reordered(..., sep = "___")
scale_y_reordered(..., sep = "___")
x |
Vector to reorder. |
by |
Vector of the same length, to use for reordering. |
within |
Vector of the same length that will later be used for faceting |
fun |
Function to perform within each subset to determine the resulting ordering. By default, mean. |
sep |
Separator to distinguish the two. You may want to set this manually if ___ can exist within one of your labels. |
... |
In |
"Ordering categories within ggplot2 Facets" by Tyler Rinker: https://trinkerrstuff.wordpress.com/2016/12/23/ordering-categories-within-ggplot2-facets/
library(tidyr)
library(ggplot2)
iris_gathered <- gather(iris, metric, value, -Species)
# reordering doesn't work within each facet (see Sepal.Width):
ggplot(iris_gathered, aes(reorder(Species, value), value)) +
geom_boxplot() +
facet_wrap(~ metric)
# reorder_within and scale_x_reordered work.
# (Note that you need to set scales = "free_x" in the facet)
ggplot(iris_gathered, aes(reorder_within(Species, value, metric), value)) +
geom_boxplot() +
scale_x_reordered() +
facet_wrap(~ metric, scales = "free_x")
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