x
(PLFLT *, input) Pointer to set of x coordinate values at which the function is
evaluated.
y
(PLFLT *, input) Pointer to set of y coordinate values at which the function is
evaluated.
z
(PLFLT **, input) Pointer to a vectored two-dimensional array with set of
function values.
nx
(PLINT, input) Number of x values at
which function is evaluated.
ny
(PLINT, input) Number of y values at
which function is evaluated.
opt
(PLINT, input) Determines the way in which the surface is represented. To specify
more than one option just add the options, e.g. FACETED + SURF_CONT
opt =FACETED: Network
of lines is drawn connecting points at which function is
defined.
opt =BASE_CONT: A contour
plot is drawn at the base XY plane using parameters
nlevel and clevel .
opt =SURF_CONT: A contour
plot is drawn at the surface plane using parameters
nlevel and clevel .
opt =DRAW_SIDES: draws a curtain
between the base XY plane and the borders of the plotted function.
opt =MAG_COLOR:
the surface is colored according to the value of Z; if
MAG_COLOR is not used, then the default
the surface is colored according to the intensity of the
reflected light in the surface from a light source whose
position is set using pllightsource .
clevel
(PLFLT *, input) Pointer to the array that defines the contour level spacing.
nlevel
(PLINT, input) Number of elements in the clevel array.
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