15.4.2 Line Styles
Line styles are specified by the following properties:
linestyle
- May be one of
"-"
- Solid line. [default]
"--"
- Dashed line.
":"
- Dotted line.
"-."
- A dash-dot line.
"none"
- No line. Points will still be marked using the current Marker Style.
linewidth
- A number specifying the width of the line. The default is 1. A value
of 2 is twice as wide as the default, etc.