ggplot2 Force y-axis to start at origin and float y-axis upper limit

Question

After a bit of searching I am still not happy!

Is there a simple way to make a graph with a y-axis that starts at the origin and clearly shows all your data?

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Answer 1

Why not just:

ggplot(my.data, aes(x.var, y.var))+
    geom_point()+
    scale_y_continuous(expand = c(0,0))+
    expand_limits(y = c(0,1.05 * max(my.data$y.var)))