ggplot2: coloring segments of single line with different colors

Question

I would like to plot two lines and then color segments of a single line with different colors. Here is a simple code:

temp <- data.frame(x = c(2, 4, 5, 5, 7, 6, 7, 8, 10, 9), y = c(3, 8, 4, 8, 8, 4, 9, 12, 5, 1), line = c('a', 'a', 'a', 'a', 'a', 'b', 'b', 'b', 'b', 'b'), color = c('c', 'c', 'd', 'd', 'd', 'c', 'c', 'c', 'd', 'd')) ggplot() + geom_line(aes(x, y, linetype = line, color = ???), data = temp)

I want to color segments of each line using the color factor. Any help? Thank you in advance!

Thank you for your reply. I have updated the question to make it more clear. — just_rookie
– just_rookie, Commented Aug 25, 2017 at 3:30
Each line in your sample data comprises 3 segments between 4 points. With 2 colours, how do you intend to split the colours among the segments? — Z.Lin
– Z.Lin, Commented Aug 25, 2017 at 3:42
Okay... after edits your lines now each have 4 segments between 5 points. Still not clear how you want the transition segments colored. Run ggplot(temp, aes(x, y)) + geom_line(aes(linetype = line)) + geom_point(aes(color = color)), we could make the lines between the red points red and the lines between the blue points blue. What color do you want the lines between the red and blue points?? — Gregor Thomas
– Gregor Thomas, Commented Aug 25, 2017 at 4:42

Likan Zhan · Accepted Answer · 2017-08-25 03:48:10Z

4

Does this graph solve you problem?

ggplot() + geom_line(aes(x, y, group = line, color = color), data = temp)

answered Aug 25, 2017 at 3:48

Likan Zhan

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