[R] Histograms without bars

hadley wickham
Mon, 19 May 2008 23:44:22 -0000

> Is is possible to plot points whose y coordinate correspond to that
> probability, instead of plotting the histogram bars? In other words,
> instead of having a bar of width 0.01 and height, say, 80, I'd like to
> have a single point at y = 0.8.

Very easily with ggplot2:

install.packages("ggplot2")
library(ggplot2)

qplot(carat, data=diamonds, stat="bin", geom="point")
qplot(carat, data=diamonds, stat="bin", geom="point",
binwidth=0.01)
# or with a line
qplot(carat, data=diamonds, stat="bin", geom="line")

# oh and by default the y axis gives count, to give probalilites use
qplot(carat, ..density.., data=diamonds, stat="bin",
geom="point")

Hadley
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