u, v
(PLFLT **, 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 for identity mapping, and pltr1 and pltr2 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 Section called Contour Plots from C in Chapter 3.
The transformation function should
have the form given by any of pltr0 , pltr1 , or pltr2 .
pltr_data
(PLPointer, input) Extra parameter to help
pass information to pltr0 , pltr1 , pltr2 , or whatever routine
that is externally supplied.
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