Hi, I'm trying to figure out the formula used by ggplot2 to calculate the width of a bar in geom_bar so that I can use that elsewhere in the plot. My code looks like this:
ggplot(xAll, aes(Date)) +
geom_bar(subset = .(Direction == "Up"), aes(y = Change, fill =
Time), stat = "identity") +
geom_bar(subset = .(Direction == "Down"), aes(y = Change, fill =
Time), stat = "identity") +
geom_segment(data = xline,
aes(Date, Total,
xend = Date,
yend = (Total - (sign(Total) * (mean(Total)/25)))),
size = 5, # this is where I need to substitute in
the geom_bar width
color = "white")
Right now, I have to manually adjust (i.e. guess) the size of
geom_segment so that it matches the width of geom_bar. Can someone
point me to the formula used by geom_bar to calculate bar width? I've
attached an example plot for reference.
Thanks,
James
<<attachment: bar_plot.png>>
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