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Asked: 2026-05-27T18:44:11+00:00

I would like to plot a time series that look like this: what I

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I would like to plot a time series that look like this:

enter image description here

what I plot with:

qplot(Jahr, Wert, data=tu, group = Geschlecht, color = Altersgr) + facet_grid(Geschlecht ~ Land)

My data looks like this:

  Land   Altersgr Geschlecht Jahr  Wert
1   DE    < 20 J.          m 2000  13.0
2   DE  20-<65 J.          m 2000  25.7
3   DE     65+ J.          m 2000  70.1
4   DE  65-<80 J.          m 2000  44.2
5   DE     80+ J.          m 2000 213.5
6   BB    < 20 J.          m 2000  26.8

Everything is fine so far. But I have to connect the corresponding points (same color) with a line. I couldn’t figure out how to do that. If I use geom_line() I got this result:

enter image description here

Which is not what I want… I just have the feeling I overlook something…

Any suggestions? Thanks for y’all help.

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1 Answer

  1. Editorial Team

    You may find that using the `group’ aes will help you get the result you want. For example:

    tu <- expand.grid(Land       = gl(2, 1, labels = c("DE", "BB")),
                  Altersgr   = gl(5, 1, labels = letters[1:5]),
                  Geschlecht = gl(2, 1, labels = c('m', 'w')),
                  Jahr       = 2000:2009)

set.seed(42)
tu$Wert <- unclass(tu$Altersgr) * 200 + rnorm(200, 0, 10)

ggplot(tu, aes(x = Jahr, y = Wert, color = Altersgr, group = Altersgr)) + 
  geom_point() + geom_line() + 
  facet_grid(Geschlecht ~ Land)

    Which produces the plot found here:

    enter image description here

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