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Taking the graph from ggplot2 help pages:
ggplot(mtcars, aes(factor(cyl))) + geom_bar() + facet_grid(. ~ vs)
Is it possible to change the border (colour and/or thickness) of only selected panels? I'd like to, for instance, change the border of the facet of '1' of faceting variable vs.
I tried adding
theme(panel.border = element_rect(size = 3, colour = "red", fill = NA))
but that solution changes all borders.
I was also thinking about using geom_rect or geom_polygon but am not sure how to limit it to one plot either.
I stumbled upon this thread on R help list, but the solutions didn't work for me
Any suggestions on how to move forward will be much appreciated.
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Facet labels can be modified using the option labeller , which should be a function. In the following R code, facets are labelled by combining the name of the grouping variable with group levels. The labeller function label_both is used.
To change the plot border color of a ggplot2 graph in R, we can use theme function with panel. background argument where we can set the border of the plot panel using element_rect to desired color.
facet_wrap() makes a long ribbon of panels (generated by any number of variables) and wraps it into 2d. This is useful if you have a single variable with many levels and want to arrange the plots in a more space efficient manner. You can control how the ribbon is wrapped into a grid with ncol , nrow , as.
facet_grid() forms a matrix of panels defined by row and column faceting variables. It is most useful when you have two discrete variables, and all combinations of the variables exist in the data. If you have only one variable with many levels, try facet_wrap() .
How about filling it with a colour like this?
dd <- data.frame(vs = c(0,1), ff = factor(0:1))
ggplot() + geom_rect(data=dd, aes(fill=ff),
xmin=-Inf, xmax=Inf, ymin=-Inf, ymax=Inf, alpha=0.15) +
geom_bar(data = mtcars, aes(factor(cyl))) + facet_grid(. ~ vs) +
scale_fill_manual(values=c(NA, "red"), breaks=NULL)
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