| The PLplot Plotting Library: Programmer's Reference Manual | ||
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plvpas: Specify viewport using coordinates and aspect ratio
      Device-independent routine for setting up the viewport.  The viewport
      is chosen to be the largest with the given aspect ratio that fits
      within the specified region (in terms of normalized subpage
      coordinates).  This routine is functionally equivalent to plvpor
      when a ``natural'' aspect ratio (0.0) is chosen.  Unlike plvasp,
      this routine reserves no extra space at the edges for labels.
    
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