defining minimum point size in ggplot2 - geom_point

Question

Let\'s say I have a lot of values around 0,1 and a few around 10. I have mapped them i.e., with:

geom_point(aes(size=value))

..which gives

Answer 1

If you look in ?scale_size you'll see range argument:

df <- data.frame(x = 1:10,y = runif(10),sz = c(rep(1,8),10,10))

ggplot(df,aes(x = x,y = y,size = sz)) + 
    geom_point() + 
    scale_size_continuous(range = c(2,4))