Colors and line style in ggplot2

Question

I have 5 groups that I want to show on a plot in ggplot2 as shown in the example HERE. However I do not know how to specify that each group gets a different color in ggplot2 setting AND also different shades? So for example in the image red is group A and blue is group B. Solid line is female and dashed line is male. Yellow is reference group. Thank you!

Please show 1) your data, 2) what you've tried, and 3) what research you've done so far, such as looking at the vignettes or reference pages for `ggplot2`. The package is very well documented, so you should find good examples there to get you started. See [here](https://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example) on posting good R questions — camille, Apr 11 '18 at 15:48
Hi @Oscar if my answer has solved your question please consider [accepting it](https://meta.stackexchange.com/q/5234/179419) by clicking the check-mark. This indicates to the wider community that you've found a solution and gives some reputation to both the answerer and yourself. Thanks. — mpalanco, Apr 13 '18 at 19:28

score 0 · Answer 1 · answered Apr 13 '18 at 08:32

Data

# random example
df <- structure(list(time = c(1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 
    1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 1L, 2L, 3L, 4L, 5L, 
    6L, 7L, 8L, 9L, 10L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 
    1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L), group = c("A", "A", 
    "A", "A", "A", "A", "A", "A", "A", "A", "B", "B", "B", "B", "B", 
    "B", "B", "B", "B", "B", "C", "C", "C", "C", "C", "C", "C", "C", 
    "C", "C", "D", "D", "D", "D", "D", "D", "D", "D", "D", "D", "E", 
    "E", "E", "E", "E", "E", "E", "E", "E", "E"), value = c(3L, 3L, 
    8L, 5L, 4L, 4L, 9L, 6L, 7L, 4L, 5L, 2L, 6L, 8L, 6L, 7L, 6L, 2L, 
    4L, 10L, 3L, 7L, 3L, 2L, 8L, 6L, 5L, 3L, 1L, 7L, 6L, 9L, 7L, 
    4L, 6L, 4L, 7L, 6L, 7L, 7L, 3L, 4L, 10L, 2L, 7L, 10L, 7L, 8L, 
    10L, 3L)), row.names = c(NA, -50L), .Names = c("time", "group", 
    "value"), class = "data.frame")

Plot

You can manually control colour and line type using scale_color_manual and scale_linetype_manual. For line type you can use numbers too: 0 = blank, 1 = solid, 2 = dashed, 3 = dotted, 4 = dotdash, 5 = longdash, 6 = twodash.

library(ggplot2)
ggplot(data = df) +
  geom_line(aes(
    x = time ,
    y = value,
    colour = group,
    linetype = group
  )) +
  scale_color_manual(values = c(
    A = "red",
    B = "blue",
    C = "green",
    D = "yellow",
    E = "violet"
  )) +
  scale_linetype_manual(values = c("twodash","dotted","solid", "dashed", "longdash"))

Colors and line style in ggplot2

1 Answers1