Reference line
Also written: axhline, axvline, axhspan
A line showing a target, an average or an event, such as the $1,100-a-day target. `ax.axhline()`, `ax.axvline()` and `ax.axhspan()` draw them.
Also written: axhline, axvline, axhspan
A line showing a target, an average or an event, such as the $1,100-a-day target. `ax.axhline()`, `ax.axvline()` and `ax.axhspan()` draw them.