Provided by: plplot-doc_5.10.0-0ubuntu5_all 
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, 2014 PLVECT(3plplot)