Graphics |

A stem plot displays data as lines (stems) terminated with a marker symbol at each data value. In a 2-D graph, stems extend from the *x*-axis.

The `stem`

function displays two-dimensional discrete sequence data. For example, evaluating the function with the values,

yields a vector of discrete values for `y`

at given values of `t`

. A line plot shows the data points connected with a straight line.

A stem plot of the same function plots only discrete points on the curve.

Add axes labels to the *x*- and *y*-axis.

If you specify only one argument, the number of samples is equal to the length of that argument. In this example, the number of samples is a function of t, which contains 51 elements and determines the length of y.

**Customizing the Graph**

You can specify the line style, the type of marker, and the color used in the stem plot. For example, adding the string ':sr' specifies a dotted line (:), a square marker (`s`

), and a red color (`r`

). The `'fill'`

argument colors the face of the marker.

Setting the aspect ratio of the *x*- and *y*-axis to 2:1 improves the utility of the graph. You can do this by setting the aspect ratio of the plot box using `pbaspect`

.

This is equivalent to setting the `PlotBoxApectRatio`

property directly.

See `LineSpec`

for a list of line styles and marker types.

Discrete Data Graphs | Combining Stem Plots with Line Plots |