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Chapter 7 Reshaping Data 255
Joining Data Tables
Trial1.jmp has values for eight experimental conditions, and Little.jmp has values for only four of those
conditions.
You want the new table to contain all the rows that are found in Trial1.jmp, even if that row in the
Little.jmp table contains a missing value.
7 Check the Include Non Matches boxes for both tables.
In the new table, you only want one column for popcorn, one column for oil, and one column for
batch. But, you want two columns for yield—yield from Trial 1 and yield from Little.
8 Check the box beside Select columns for joined table.
9 Highlight popcorn, oil amt, batch, and yield from Trial 1’s list and click Select.
10 Highlight yield from Little’s list and click Select.
11 Ensure that the completed window matches Figure 7.38 and click OK.
Figure 7.38 Join by Matching Columns Window
7 Reshaping Data
JMP creates the table shown in Figure 7.39. The new table is now sorted by the matching columns, as
shown in Figure 7.39. Note that the yield column from Little.jmp (Yield of Little) has missing values
whenever there were no matching values in Trial1.