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Basic Analysis and Graphing - SAS

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400 Creating Bubble Plots Chapter 15<br />

Additional Examples of the Bubble Plot Platform<br />

Figure 15.14 Example of New Engl<strong>and</strong> Region Split by State<br />

You see that the New Engl<strong>and</strong> states do not have as much variation as the Southwest states.<br />

Example of a Bubble Plot with a Categorical Y Variable<br />

All of the examples shown so far use continuous Y variables. If you use a categorical (nominal or ordinal) Y<br />

variable, the bubble plot appears differently.<br />

This example uses the blsPriceData.jmp sample data table, which shows the price of commodities over<br />

several years. Because the value of the US dollar changes over time, a column named Price/Price2000 shows<br />

the ratio of a commodity’s price at any given time to the price in the year 2000.<br />

1. Open the blsPriceData.jmp sample data table.<br />

2. Select Graph > Bubble Plot.<br />

3. Select Series <strong>and</strong> click Y.<br />

4. Select Price/Price2000 <strong>and</strong> click X.<br />

5. Select date <strong>and</strong> click Time.<br />

6. Click OK.<br />

The report window appears.<br />

This produces a bubble plot that, when animated by clicking the play button, shows the price bubbles<br />

moving side to side according to their price ratio.

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