Adding a line to ggplot

I am trying to add a line to a plot of points, and I can't figure it out. My y values are numbers from 0 to Inf, while my x values are from an ordered factor.

Here is the plotting code, which only displays points:

g = ggplot() +
  layer(data = ratesdf, mapping = aes(x = age, y = rates), geom = "point", stat="identity") +
  layer(data = ratesdf, mapping = aes(x = age, y = rates), geom = "smooth", stat = "smooth", method = loess)
print(g)

Here is the dataframe:

          rates      age
[0,5)    0.00000000    [0,5)
[5,10)   0.00000000   [5,10)
[10,15)  0.00000000  [10,15)
[15,20)  0.02017059  [15,20)
[20,25)  0.32707402  [20,25)
[25,30)  0.54013169  [25,30)
[30,35)  0.71698958  [30,35)
[35,40)  0.81120944  [35,40)
[40,45)  0.87283637  [40,45)
[45,50)  0.91411649  [45,50)
[50,55)  0.91273334  [50,55)
[55,60)  0.95627322  [55,60)
[60,65)  0.92879819  [60,65)
[65,70)  0.98088779  [65,70)
[70,75)  0.90406674  [70,75)
[75,80)  1.00000000  [75,80)
[80,85)  1.00000000  [80,85)
[85,Inf] 1.00000000 [85,Inf]

Thanks to everyone in advance!

(Hadley, I promise to buy your book as soon as I get my annual birthday giftcards :开发者_开发百科) )

You'll need to manually specify group = 1 because by default ggplot2 groups by the combination of all categorical variables on the plot.

I'm not sure if I've missed what you are trying to do, but are basically wanting a step function. For example:

rates = c(0.00000000 ,0.00000000 ,0.00000000 ,0.02017059 ,0.32707402, 0.54013169 ,0.71698958 ,0.81120944 ,0.87283637 ,0.91411649 ,0.91273334 ,0.95627322 ,0.92879819 ,0.98088779 ,0.90406674 ,1.00000000 ,1.00000000, 1.00000000 )
age = seq(0, 85, 5)

#ReJig the variables
r2 = sort(rep(rates,2));r2 = r2[1:(length(r2)-1)]
a = sort(rep(age,2));a = a[2:(length(a))]

library(ggplot2)
ggplot() + geom_line(aes(x=a, y=r2))

HTH