spine

lq.spine(stroke: (thickness: 0.5pt, cap: "square"), tip: none, toe: none)(source)

The spine of a diagram axis (the line drawn along the axis).

Parameters

stroke : none | stroke    default: (thickness: 0.5pt, cap: "square")

How to stroke the spine of the axis.

tip : none | tiptoe.mark    default: none

Places an arrow tip on the axis spine. This expects a mark as specified by the tiptoe package.

toe : none | tiptoe.mark    default: none

Places an arrow tail on the axis spine. This expects a mark as specified by the tiptoe package.