Reorder bars in esquisse with forcats

[daricomp]

Hi,

this is a suggestion for improving esquisse (which I love and teach to Nanterre students) with a new feature.

One common task in barplots and other graphs involving categorical variables is to reorder them. The package forcats offers some solutions that could be developed in esquisse, in particular fct_infreq(), fct_rev() and fct_reorder().

Three examples:

ggplot(mpg) +
aes(x = fct_infreq(fl), fill = drv) +
geom_bar()

ggplot(mpg) +
aes(x = fct_rev(fct_infreq(fl)), fill = drv) +
geom_bar()

ggplot(iris) +
aes(y = Sepal.Width, color = fct_reorder(Species, Sepal.Width)) +
geom_boxplot()

I believe that these three alone could permit to account for 80% of all needs.

Best, and keep going with this great software!
Dario