Why isn't my legend showing?

Question

Why isn't my legend showing up when I plot this?

ggplot(data=baseline_total, aes(x=sighd_rater_total, color="sighd_rater_total")) + 
geom_area(stat="bin", col = 'light blue', fill='light blue') + 
geom_freqpoly(data=baseline_total,aes(x=sighd_tier1_total, color="sighd_tier1_total"), stat = "bin", col = 'dark blue')

[How to make a great R reproducible example?](http://stackoverflow.com/questions/5963269) — zx8754, Feb 16 '16 at 19:54
Alternatively consider making use of the `aes_string`. Please also consider providing some data and redoing your example on some of the easily available data sets. — Konrad, Feb 16 '16 at 19:58

score 1 · Answer 1 · answered Feb 18 '16 at 22:41

If you specify the colour (or fill, shape, etc.) within the aes() you need to do so without "" in order to get a legend based on that variable. So this will probably work:

ggplot(data = baseline_total, aes(x = sighd_rater_total, colour = sighd_rater_total)) + 
geom_area(stat="bin", colour = "light blue", fill = "light blue") + 
geom_freqpoly(data = baseline_total, aes(x = sighd_tier1_total, colour = sighd_tier1_total), stat = "bin")

Why isn't my legend showing?

1 Answers1