ggplot2 Error: Insufficient values in manual scale

Question

When you have less colours defined with scale_fill_manual than levels in a factor, ggplot2 complains with this error message :

# B         


        

Answer 1

Just found a way to fill a palette to the needed size by picking from a given pool.

# count the needed levels of a factor
number <- nlevels(s4r$DIM)

# repeat the given colors enough times
palette <- rep(c("color1", "color2", ...), length.out = number)

# or, if you want a random distribution:
# if you want it random, but reproducable,
# backup .Random.seed, or set your own
set.seed(23)
palette <- sample(c("color1", "color2", ...), number, replace = TRUE)

scale_fill_manual(values=palette)