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.