How to jitter both geom_line and geom_point by the same magnitude?

Question

I have a ggplot2 linegraph with two lines featuring significant overlap. I\'m trying to use position_jitterdodge() so that they are more visible, b

Answer 1

On July 2017, developpers of ggplot2 have added a seed argument on position_jitter function (https://github.com/tidyverse/ggplot2/pull/1996).

So, now (here: ggplot2 3.2.1) you can pass the argument seed to position_jitter in order to have the same jitter effect in geom_point and geom_line (see the official documentation: https://ggplot2.tidyverse.org/reference/position_jitter.html)

Note that this seed argument does not exist (yet) in geom_jitter.

ggplot(data = df, aes(x = dimension, y = value,
                      shape = Time, linetype = Time, group = Time)) +
  geom_line(position = position_jitter(width = 0.25, seed = 123)) +
  geom_point(position = position_jitter(width = 0.25, seed = 123)) +
  xlab("Dimension") + ylab("Value")