Would be nice to have geom_step not throw in non renderable situations

[JohnMount]

It would be nice to have geom_step not throw in non renderable situations. It would be an improvement if the following code:

library('ggplot2')
d <- data.frame(x=1,y=1)
ggplot(data=d,aes(x=x,y=y)) + geom_step()

issued a warning and draws a graph like geom_line does in:

ggplot(data=d,aes(x=x,y=y)) + geom_line()

instead of erroring-out with the message "invalid line type" (as Cran current ggplot2 2.1.0 does). One can easily run into this when using geom_step with facet_wrap.

I have an article explaining the actual use case here https://github.com/WinVector/Examples/blob/master/UsingGeomStep/UsingGeomStep.md and the small example here https://github.com/WinVector/Examples/blob/master/UsingGeomStep/StepThrow.md .

[hadley]

Somewhat ironically, caused by use of 1:length(x) 😦

[JohnMount]

That 1:0 thing is the bug that just keeps on giving. That being said I do appreciate you teaching seq_len().