plotlines geom

[bbolker]

this is pretty trivial, but I'm just putting it here to register/remind myself of it. I've often wished for a combined geom_pointlines() for use cases like

ggplot(...) +
   geom_point(<some complicated arguments>) +
   geom_lines(<the same set of complicated arguments>)

The only questions would be things like:

• what to do with cases where geom_lines might fail (e.g. different colours apply to different parts of the same line)
• what if most but not all of the arguments are shared between points and lines?

Neither of these seem to be a very big deal.