(u, v, nx, ny, scale, pltr, pltr_data);
Draws a vector plot of the vector
The scaling factor for the vectors is given by
transformation routine pointed to by
with a pointer
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
(PLFLT **, input)
Pointers to a pair of vectored two-dimensional arrays
containing the x and y components of the vector data to be
Physical dimensions of the arrays
Parameter to control the scaling factor of the vectors for plotting.
scale = 0 then
the scaling factor is automatically calculated for the data.
scale < 0 then
the scaling factor is automatically calculated for the data and
then multiplied by -
scale > 0 then
the scaling factor is set to
(void (*) (PLFLT, PLFLT, PLFLT *, PLFLT *, PLPointer)
Pointer to function that defines transformation between indices
z and the
world coordinates (C only). Transformation functions are
provided in the PLplot library:
pltr0 for identity mapping, and
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 Section called Contour Plots from C in Chapter 3.
The transformation function should
have the form given by any of
Extra parameter to help
pass information to
pltr2, or whatever routine
that is externally supplied.
plvect(u, v, scale, pltr, pltr_data)
This function is used in example 22.