geom_col does not plot all data points

Question

I have faced a weird behaviour of geom_col and it drives me crazy: basically it does not plot all the data points. When I add geom_point() I clearly see that they are not all represented with a bar.

MWE :

x = sample(1:2000, size = 600, replace = FALSE)
y = 1:600
ggplot(data.frame(x = x, y = y), aes(x,y)) + geom_col() + geom_point()

@Bankelal each point should have one associated bar. I have change the MWE so as to be more reproducible. I guess there is something with the range of x — ClementWalter
– ClementWalter, Commented May 11, 2017 at 13:47
This is not a problem with geom_col, but depends on you graphics device. — Henrik
– Henrik, Commented May 11, 2017 at 14:01

alko989 · Accepted Answer · 2017-05-11 13:48:28Z

2

It is actually plotting all vertical lines, the problem is that it is too thin to show. If you zoom in you will see all the lines.

Try to make the width of the lines thicker, e.g.

ggplot(data.frame(x = x, y = y), aes(x, y)) + geom_col(width = 3) + geom_point()

answered May 11, 2017 at 13:48

alko989

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3 Comments

ClementWalter Over a year ago

uhmm, it works, but I think this is a very misleading behaviour of geom_col. What if the sequence becomes arbitrarily longer? It means that one can never be sure one sees all the samples

alko989 Over a year ago

I also found it strange at first but it makes sense, you can not see arbitrarily thin lines on your monitor. The default width is just too thin.

ClementWalter Over a year ago

they could overlap like geom_point and geom_line for instance

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