| 
            plsori
          ( | ori ); | 
      Set integer plot orientation parameter.  This function is
      identical to plsdiori except for the type of the argument, and
      should be used in the same way.  See the documentation of plsdiori for
      details.
    
ori
          (PLINTOrientation value (0 for landscape, 1 for portrait, etc.) The value is multiplied by 90 degrees to get the angle.
      Redacted form: plsori(ori)
    
This function is used in example 3.