**plot3d** - Plot 3-d surface plot

**plot3d**(*x*, *y*, *z*, *nx*, *ny*, *opt*, *side*)

Plots a three dimensional surface plot within the environment set up by **plw3d**(3plplot). The surface is defined by the two-dimensional array *z*[*nx*][*ny*], the point *z*[i][j] being the value of the function at (*x*[i], *y*[j]). Note that the points in arrays *x* and *y* do not need to be equally spaced, but must be stored in ascending order. The parameter *opt* controls the way in which the surface is displayed. For further details see the PLplot documentation. The only difference between **plmesh**(3plplot) and **plot3d**(3plplot) is that **plmesh**(3plplot) draws the bottom side of the surface, while **plot3d**(3plplot) only draws the surface as viewed from the top.

Redacted form: **plot3d(x, y, z, opt, side)**

This function is used in examples 11,21.

*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: *opt*=DRAW_LINEX: Lines are drawn showing *z* as a function of *x* for each value of *y*[j]. *opt*=DRAW_LINEY: Lines are drawn showing *z* as a function of *y* for each value of *x*[i]. *opt*=DRAW_LINEXY: Network of lines is drawn connecting points at which function is defined.

*side* (PLBOOL, input)

Flag to indicate whether or not ‘‘sides’’ should be draw on the figure. If *side* is true sides are drawn, otherwise no sides are drawn.

Geoffrey Furnish and Maurice LeBrun wrote and maintain PLplot. This man page was automatically generated from the DocBook source of the PLplot documentation, maintained by Alan W. Irwin and Rafael Laboissiere.

PLplot documentation at http://plplot.sourceforge.net/resources.