`contour3`

Draws contour lines at their own height in a 3-D view.

Syntax

contour3(Z)

3-D contour lines of the matrix Z.

contour3(X, Y, Z)

Uses the coordinates X and Y.

contour3(___, levels)

Sets the number of levels or the level values.

h = contour3(___)

Also returns the contour object.

Description

Where contour flattens the lines onto a plane, contour3 draws each one at the height of its level, so the picture is a wireframe of the surface cut by horizontal planes. Rotate the plot to inspect it.

Input arguments

Z: Matrix of values.
X, Y: Grid coordinates.
levels: Number of levels or vector of level values.

Output arguments

h: The Contour object.

Example

Peaks in 3-D

[X, Y, Z] = peaks(30);
contour3(X, Y, Z, 12)
view(3)

In the app, the figure is drawn below the code.

contour3