NAME¶
plcont - Contour plot
SYNOPSIS¶
plcont(
f,
nx,
ny,
kx,
lx,
ky,
ly,
clevel,
nlevel,
pltr,
pltr_data)
DESCRIPTION¶
Draws a contour plot of the data in
f[
nx][
ny], using the
nlevel contour levels specified by
clevel. Only the region of
the array from
kx to
lx and from
ky to
ly is
plotted out. 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. See the
following discussion of the arguments and the PLplot documentation for more
information.
Redacted form: [PLEASE UPDATE! ONLY PERL INFO IS LIKELY CORRECT!] F95:
plcont(f, kx, lx, ky, ly, clevel, tr?) or
plcont(f, kx, lx, ky, ly,
clevel, xgrid, ygrid) Java:
pls.cont(f, kx, lx, ky, ly, clevel, xgrid,
ygrid) Perl/PDL:
plcont(f, kx, lx, ky, ly, clevel, pltr, pltr_data)
Python:
plcont2(f, kx, lx, ky, ly, clevel)
This function is used in examples 9,14,16,22.
ARGUMENTS¶
- f (const PLFLT * const *, input)
- Pointer to a vectored two-dimensional array containing data to be
contoured.
- nx, ny (PLINT, input)
- Physical dimensions of array f.
- kx, lx (PLINT, input)
- Range of x indices to consider.
- ky, ly (PLINT, input)
- Range of y indices to consider.
- clevel (const PLFLT *, input)
- Pointer to array specifying levels at which to draw contours.
- nlevel (PLINT, input)
- Number of contour levels to draw.
- pltr (void (*) (PLFLT, PLFLT, PLFLT *, PLFLT *, PLPointer) ,
input)
- Pointer to function that defines transformation between indices in array
f 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). Note that unlike plshades(3plplot) and
similar PLplot functions which have a pltr argument, plcont
requires that a transformation function be provided in the C interface.
Leaving pltr NULL will result in an error.
- 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.