To create a bar chart of the category variable:
Select Graph Bar Chart from the main menu.
The Bar Chart dialog box appears. (See Figure 2.3.)
Select the variable category, and click Set X.
Note:In most dialog boxes, double-clicking a variable name adds the variable to the next appropriate field.
Click OK.
The bar chart in Figure 2.4 appears. The bar chart shows the number of observations for storms in each Saffir-Simpson intensity category.