Changing line colors with ggplot

Question

I don t use ggplot2 that much  but today I thought I d give it a go on some graphs  But I can t figure out how to manually control colors in geom line    I m sure I m overlooking something simple  but here s my test code    x  lt - c 1 20  1 20  variable  lt - c rep  y1   20   rep  y2   20    value  lt - c rnorm 20   rnorm 20  5     df  lt - data frame x  variable  value    d  lt - ggplot df  aes x x  y value  group variable  colour variable                    geom line size 2  d   which gives me the expected output     I thought all I had to do was something simple like   d    scale fill manual values c   CC6666     9999CC      But that changes nothing  What am I missing

User · Accepted Answer

color and fill are separate aesthetics  Since you want to modify the color you need to use the corresponding scale   d   scale color manual values c   CC6666     9999CC      is what you want

[r] Changing line colors with ggplot()

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