contour3

Syntax

contour3(z)

contour3(x, y, z)

contour3(hAxes, ...)

contour3(..., cn)

Inputs

x, y, z

Range of the x, y, and z axes.

Type: double | integer

Dimension: scalar | vector | matrix

hAxes

Axis handle.

Type: double

Dimension: scalar

cn

Optional argument to set the number of contours, changing the number of colors in the colormap. The number of colors is limited to 32.

Type: integer

Dimension: scalar

Examples

contour3 plot example:

cla;
x=[0:0.15:2*pi];
y=x;
z=sin(x')*cos(y);
contour3(z);
colorbar;

Figure 1. 3D contour plot

Number of contours example:

cla;
x=[0:0.15:2*pi];
y=x;
z=sin(x')*cos(y);
contour3(z, 4);
colorbar;

Figure 2. 3D contour plot with four color levels

Comments

If there are no axes, one will be created first. If x and y are omitted, the index of the z column is used for the x coordinate and the index of the z row is used for the y coordinate. If the first argument of contour3() is an axis handle, surfaces are created in that axis.