Example of an Overlay Plot
This example shows you how to plot two variables on a single y-axis.
1. Open the Spring.jmp sample data table.
The table has a row for each day in the month of April. The column named April is the numeric day of the month, and the remaining columns are various weather statistics.
2. Select the Overlay Plot command from the Graph menu.
3. Select Humid1:PM and Humid4:PM and click Y.
These two columns are the humidity measurements at 1:00 p.m. ...