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254 Reshaping Data Chapter 7
Joining Data Tables
Figure 7.36 Two Tables
Before examining the collected data, you realize it would be convenient to join Sarah and Joe’s tables
into a single table, such as the one in Figure 7.37.
Figure 7.37 How You Want the Combined Tables to Look
To join Sarah and Joe’s tables:
1 Select Tables > Join.
2 Identify Little as the table to which you want to join Trial 1.
Both tables have three columns (popcorn, oil amt/oil, and batch) that contain the same values. You can
uniquely identify the columns in JMP as “matches.” Further, because Sarah and Joe gave the oil amount
column different names, you need to tell JMP that oil amt and oil “match.”
3 Select By Matching Cols in the Matching Specification area.
4 Highlight popcorn, oil amt, and batch from Trial 1’s list.
5 Highlight popcorn, oil, and batch from Little’s list.
6 Click Match.
As you can see from Figure 7.36, Sarah completed her experiment, but Joe only partially completed his
experiment. Therefore, the tables you received from Sarah and Joe have different numbers of rows: