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Example

You can change the default tick marks for the axis of an interval variable by following these steps.

Open the Hurricanes data set, and create a scatter plot of wind_kts versus latitude.

The scatter plot appears as in Figure 10.1. Note that the latitude axis has only a few tick marks. You might decide to add a few additional tick marks.

Figure 10.1: A Scatter Plot

Right-click on the horizontal axis of the plot, and select Axis Properties from the pop-up menu, as shown in Figure 10.2.

Figure 10.2: The Axis Pop-up Menu

The Axis Properties dialog box appears, as shown in Figure 10.3. Note that this is a quick way to determine the anchor location, tick unit, and tick range for an axis.

Figure 10.3: Axis Properties Dialog Box

Change the Anchor tick value to 0.

Change the Major tick unit value to 10.

Change the Number of minor ticks value to 1.

Click OK.

The latitude axis updates, as shown in Figure 10.4.

Figure 10.4: A Scatter Plot with Custom Tick Marks