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

My workaround so far is to provide ggplot2 with more colours, should any more levels appear, like this:

# Basic definition of the plot
plot <- ggplot(s4r, aes(x=DIM, y=nbexpress, fill=DIM))

# Printing plot and options + faceting if any
plot + geom_bar(stat="identity", show_guide=FALSE) + 
  scale_fill_manual(values=c("#CC0000", "#006600", "#669999", "#00CCCC", 
                             "#660099", "#CC0066", "#FF9999", "#FF9900", 
                             "black", "black", "black", "black", "black"))