plarcm
plot an arc in mm units
| parameter | type | units | description |
|---|---|---|---|
| xcentr,ycentr | float | mm | position of the center of the arc |
| radius | float | mm | radius of the arc |
| angl | float | degr | angle of radius to the start relative to x-axis |
| arc | float | degr | size of the arc |
| linestyle | int | -- | see plot |
| returns: | void |