x (PLFLT_VECTOR(3plplot), input)
A vector containing the x coordinates at which the function is evaluated.
y (PLFLT_VECTOR(3plplot), input)
A vector containing the y coordinates at which the function is evaluated.
z (PLFLT_MATRIX(3plplot), input)
A matrix containing function values to plot. Should have dimensions of nx by ny.
nx (PLINT(3plplot), input)
Number of x values at which function is evaluated.
ny (PLINT(3plplot), input)
Number of y values at which function is evaluated.
opt (PLINT(3plplot), 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 surface is colored according to the intensity of the
reflected light in the surface from a light source whose position is set using
pllightsource(3plplot).
clevel (PLFLT_VECTOR(3plplot), input)
A vector containing the contour levels.
nlevel (PLINT(3plplot), input)
Number of elements in the clevel vector.