# plot3dc.3plplot man page

**plot3dc** — Magnitude colored plot surface with contour

## Synopsis

**plot3dc**(*x*, *y*, *z*, *nx*, *ny*, *opt*, *clevel*, *nlevel*)

## Description

Aside from dropping the *side* functionality this is a more powerful form of **plot3d**(3plplot): the surface mesh can be colored accordingly to the current z value being plotted, a contour plot can be drawn at the base XY plane, and a curtain can be drawn between the plotted function border and the base XY plane. The arguments are identical to those of **plmeshc**(3plplot). The only difference between **plmeshc**(3plplot) and **plot3dc**(3plplot) is that **plmeshc**(3plplot) draws the bottom side of the surface, while **plot3dc**(3plplot) only draws the surface as viewed from the top.

Redacted form: General: **plot3dc(x, y, z, opt, clevel)** Perl/PDL: Not available?

This function is used in example 21.

## Arguments

*x*(const PLFLT *, input)- Pointer to set of x coordinate values at which the function is evaluated.
*y*(const PLFLT *, input)- Pointer to set of y coordinate values at which the function is evaluated.
*z*(const PLFLT * const *, 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. DRAW_LINEXY + MAG_COLOR
*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.*opt*=MAG_COLOR : Each line in the mesh is colored according to the z value being plotted. The color is used from the current color map 1.*opt*=BASE_CONT : A contour plot is drawn at the base XY plane using parameters*nlevel*and*clevel*.*opt*=DRAW_SIDES : draws a curtain between the base XY plane and the borders of the plotted function. *clevel*(const PLFLT *, input)- Pointer to the array that defines the contour level spacing.
*nlevel*(PLINT, input)- Number of elements in the clevel array.

## Authors

Many developers (who are credited at http://plplot.sourceforge.net/credits.p…) have contributed to PLplot over its long history.

## See Also

PLplot documentation at http://plplot.sourceforge.net/documenta….