Hopefully this will be quick.
I have plotted the following chart using ggplot.

with the code:
ggplot(ContourDummy,aes(x=Measure.Name1,y=Measure.Name2,colour=Category.Name))
+geom_density_2d()
My issue is that some of the contour lines are not complete.
Now if I scale my axis by adding the following...
+ scale_x_continuous(minor_breaks=0, breaks=seq(14,26,12),limits=c(14,26))
+ scale_y_continuous(minor_breaks=0, breaks=seq(50,100,50),limits=c(50,100)
I get the desired output.
But is there any way of automatically setting the limits? I want to be able to replicate this chart type automatically just by switching the data source, x, y and colour.
I don't particularly want to be fiddling around with scales every time.