How to change x-axis tick label names, order and boxplot colour using R ggplot?

Question

I have a folder containing csv files, each with two columns of data e.g.:

0,red
15.657,red
0,red
0,red
4.429,red
687.172,green
136.758,green
15.189,red
0.15         


        

Answer 1

Yes, you can do this. Use scale_color_manual, scale_fill_manual and scale_x_discrete as follows:

# specify colors and order 
colorder <- c( "green", "orange", "red", "blue") 
bplot<-ggplot(boxplots, aes(Lineage, RPKM)) + 
  geom_boxplot(aes(fill=factor(Lineage))) + 
  geom_point(aes(colour=factor(Lineage))) + 
  scale_color_manual(breaks=colorder, # color scale (for points)
                     limits=colorder, 
                     values=colorder) +
  scale_fill_manual(breaks=colorder,  # fill scale (for boxes)
                    limits=colorder, 
                    values=colorder) +
  scale_x_discrete(limits=colorder)   # order of x-axis