PLSURF3D(3plplot) | PLplot API | PLSURF3D(3plplot) |

# NAME¶

**plsurf3d** - Plot shaded 3-d surface plot

# SYNOPSIS¶

**plsurf3d**(*x*, *y*, *z*, *nx*,
*ny*, *opt*, *clevel*, *nlevel*)

# DESCRIPTION¶

Plots a three-dimensional shaded surface plot within the
environment set up by **plw3d**(3plplot). The surface is defined by the
two-dimensional matrix *z*[*nx*][*ny*], the point
*z*[i][j] being the value of the function at (*x*[i],*y*[j]).
Note that the points in vectors *x* and *y* do not need to be
equally spaced, but must be stored in ascending order. For further details
see the PLplot documentation.

Redacted form: **plsurf3d(x, y, z, opt, clevel)**

This function is not used in any examples.

# ARGUMENTS¶

*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.

# AUTHORS¶

Many developers (who are credited at http://plplot.org/credits.php) have contributed to PLplot over its long history.

# SEE ALSO¶

PLplot documentation at http://plplot.org/documentation.php.

August, 2021 |