plsdiori: Set plot orientation

`plsdiori`: Set plot orientation
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#### `plsdiori`: Set plot orientation

`plsdiori (` | rot `)`;

Set plot orientation parameter which is multiplied by 90° to obtain the angle of rotation. Note, arbitrary rotation parameters such as 0.2 (corresponding to 18°) are possible, but the usual values for the rotation parameter are 0., 1., 2., and 3. corresponding to 0° (landscape mode), 90° (portrait mode), 180° (seascape mode), and 270° (upside-down mode). If `plsdiori` is not called the default value of ``rot`` is 0.

N.B. aspect ratio is unaffected by calls to `plsdiori`. So you will probably want to change the aspect ratio to a value suitable for the plot orientation using a call to `plsdidev` or the command-line options ``-a`` or ``-freeaspect`` . For more documentation of those options see the section called “Command Line Arguments”. Such command-line options can be set internally using `plsetopt` or set directly using the command line and parsed using a call to `plparseopts`.

`rot` (``PLFLT``, input)

  Plot orientation parameter.

Redacted form: `plsdiori(rot)`

This function is not used in any examples.

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