Nothing
gf_histogram( ~ Sepal.Length, data = iris, fill = "gray85", color = "black", bins = 20) %>%
gf_freqpoly( ~ Sepal.Length, color = "black", size = 1, bins = 20)
gf_freqpoly( ~ Sepal.Length, color = ~ Species, data = iris,
binwidth = 0.5)
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