plsori: Set orientation

The PLplot Plotting Library: Programmer's Reference Manual
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### `plsori`: Set orientation

`plsori` (ori);

Sets the current orientation. If ``ori`` is equal to zero (default) then landscape is used (x axis is parallel to the longest edge of the page), otherwise portrait is used. This option is not supported by all output drivers (in particular, most interactive screen drivers ignore the orientation). This routine, if used, must be called before initializing PLplot.

`ori` (`PLINT`, input) Orientation value (0 for landscape, 1 for portrait; the value is multiplied by 90 degrees to get the angle)

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