Graphics |

`stem3`

displays 3-D stem plots extending from the *xy*-plane. With only one vector argument, MATLAB plots the stems in one row at `x = 1`

or `y = 1`

, depending on whether the argument is a column or row vector. `stem3`

is intended to display data that you cannot visualize in a 2-D view.

**Example - 3-D Stem Plot of an FFT**

For example, fast Fourier transforms are calculated at points around the unit circle on the complex plane. So, it is interesting to visualize the plot around the unit circle. Calculating the unit circle

and the magnitude frequency response of a step function

displays the data using a 3-D stem plot, terminating the stems with filled diamond markers.

**Label the Graph**

Label the graph with the statements

To change the orientation of the view, turn on mouse-based 3-D rotation.

**Example - Combining Stem and Line Plots**

Three-dimensional stem plots work well when visualizing discrete functions that do not output a large number of data points. For example, you can use `stem3`

to visualize the Laplace transform basis function,, for a particular constant value of `s`

.

Using `t`

as magnitudes that increase with time, create a spiral with increasing height and draw a curve through the tops of the stems to improve definition.

**Label the Graph**

Add axes labels, with the statements

Combining Stem Plots with Line Plots | Stairstep Plots |