sactyr

First, thank you for the great script - it works beautifully. I tried editing the rules for file extension so that it's not case sensitive e.g. it accepts both .pdf...

I understand x_axis should _always_ be categorical but perhaps we could put in class check i.e. `is.character` or `is.factor` in `e_flip_coords` to force an error, instead of silently generating an...