NAME

       plvect - Vector plot

SYNOPSIS

       plvect(u, v, nx, ny, scale, pltr, pltr_data)

DESCRIPTION

       Draws  a  vector  plot  of  the  vector  (u[nx][ny],v[nx][ny]). The scaling factor for the
       vectors is given by scale. A transformation routine pointed to  by  pltr  with  a  pointer
       pltr_data  for  additional  data  required  by  the  transformation routine is used to map
       indices within the array to the world coordinates. The style of the vector  arrow  may  be
       set using plsvect(3plplot).

       Redacted form: plvect(u, v, scale, pltr, pltr_data)

       This function is used in example 22.

ARGUMENTS

       u, v (const PLFLT * const *, input)
              Pointers  to  a  pair  of  vectored  two-dimensional  arrays containing the x and y
              components of the vector data to be plotted.

       nx, ny (PLINT, input)
              Physical dimensions of the arrays u and v.

       scale (PLFLT, input)
              Parameter to control the scaling factor of the vectors for plotting. If scale  =  0
              then the scaling factor is automatically calculated for the data. If scale < 0 then
              the scaling factor is automatically calculated for the data and then multiplied  by
              -scale. If scale > 0 then the scaling factor is set to scale.

       pltr (void (*) (PLFLT, PLFLT, PLFLT *, PLFLT *, PLPointer) , input)
              Pointer  to function that defines transformation between indices in array z and the
              world coordinates (C only).  Transformation functions are provided  in  the  PLplot
              library: pltr0(3plplot) for identity mapping, and pltr1(3plplot) and pltr2(3plplot)
              for arbitrary mappings respectively defined by one- and two-dimensional arrays.  In
              addition,  user-supplied  routines  for  the  transformation  can  be used as well.
              Examples of all of these approaches are given  in  the  PLplot  documentation.  The
              transformation  function  should  have  the  form  given  by any of pltr0(3plplot),
              pltr1(3plplot), or pltr2(3plplot).

       pltr_data (PLPointer, input)
              Extra  parameter  to  help  pass  information  to  pltr0(3plplot),  pltr1(3plplot),
              pltr2(3plplot), or whatever routine that is externally supplied.

AUTHORS

       Many  developers  (who  are  credited  at  http://plplot.sourceforge.net/credits.php) have
       contributed to PLplot over its long history.

SEE ALSO

       PLplot documentation at http://plplot.sourceforge.net/documentation.php.

                                          February, 2016                          PLVECT(3plplot)