plpath: Draw a line between two points, accounting for coordinate transforms

`plpath`: Draw a line between two points, accounting for coordinate transforms
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#### `plpath`: Draw a line between two points, accounting for coordinate transforms

`plpath (` | n ,
| x1 ,
| y1 ,
| x2 ,
| y2 `)`;

Joins the point `(`x1`, `y1`)` to `(`x2`, `y2`)` . If a global coordinate transform is defined then the line is broken in to ``n`` segments to approximate the path. If no transform is defined then this simply acts like a call to `pljoin`.

`n` (``PLINT``, input)

  number of points to use to approximate the path.

`x1` (``PLFLT``, input)

  x coordinate of first point.

`y1` (``PLFLT``, input)

  y coordinate of first point.

`x2` (``PLFLT``, input)

  x coordinate of second point.

`y2` (``PLFLT``, input)

  y coordinate of second point.

Redacted form: `plpath(n,x1,y1,x2,y2)`

This function is used in example 22.

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