Previous: Three-dimensional Function Plotting, Up: Three-Dimensional Plots [Contents][Index]

- Command:
**cylinder** - Function File:
**cylinder***(*`r`) - Function File:
**cylinder***(*`r`,`n`) - Function File:
**cylinder***(*`hax`, …) - Function File:
*[*`x`,`y`,`z`] =**cylinder***(…)* Plot a 3-D unit cylinder.

The optional input

`r`is a vector specifying the radius along the unit z-axis. The default is [1 1] indicating radius 1 at`Z == 0`

and at`Z == 1`

.The optional input

`n`determines the number of faces around the circumference of the cylinder. The default value is 20.If the first argument

`hax`is an axes handle, then plot into this axis, rather than the current axes returned by`gca`

.If outputs are requested

`cylinder`

returns three matrices in`meshgrid`

format, such that`surf (`

generates a unit cylinder.`x`,`y`,`z`)Example:

[x, y, z] = cylinder (10:-1:0, 50); surf (x, y, z); title ("a cone");

- Function File:
**sphere***()* - Function File:
**sphere***(*`n`) - Function File:
**sphere***(*`hax`, …) - Function File:
*[*`x`,`y`,`z`] =**sphere***(…)* Plot a 3-D unit sphere.

The optional input

`n`determines the number of faces around the circumference of the sphere. The default value is 20.If the first argument

`hax`is an axes handle, then plot into this axis, rather than the current axes returned by`gca`

.If outputs are requested

`sphere`

returns three matrices in`meshgrid`

format such that`surf (`

generates a unit sphere.`x`,`y`,`z`)Example:

[x, y, z] = sphere (40); surf (3*x, 3*y, 3*z); axis equal; title ("sphere of radius 3");

- Function File:
**ellipsoid***(*`xc`,`yc`,`zc`,`xr`,`yr`,`zr`,`n`) - Function File:
**ellipsoid***(…,*`n`) - Function File:
**ellipsoid***(*`hax`, …) - Function File:
*[*`x`,`y`,`z`] =**ellipsoid***(…)* Plot a 3-D ellipsoid.

The inputs

`xc`,`yc`,`zc`specify the center of the ellipsoid. The inputs`xr`,`yr`,`zr`specify the semi-major axis lengths.The optional input

`n`determines the number of faces around the circumference of the cylinder. The default value is 20.If the first argument

`hax`is an axes handle, then plot into this axis, rather than the current axes returned by`gca`

.If outputs are requested

`ellipsoid`

returns three matrices in`meshgrid`

format, such that`surf (`

generates the ellipsoid.`x`,`y`,`z`)

Previous: Three-dimensional Function Plotting, Up: Three-Dimensional Plots [Contents][Index]