Using JMP - SAS

Chapter 8 Summarize Data 235
Summarize Columns
Use One or More Grouping Columns
If you want the statistics summarized by group, highlight the column(s) that you want to be your grouping
variables and click Group to move the variable into the grouping variables list. See “Example of Creating a
Summary Table” on page 239, for an example. If you add only grouping variables, the summary table shows
a count for each group.
To change the order of the grouping variables:
To change the order of the grouping variables (ascending or descending order), select a variable in the
grouping variable list and click the ascending or descending button ( ). The icon beside the variable
changes to indicate the sorting order.
You can also change the order of the grouping variables using the Value Ordering column property. See
“Value Ordering” on page 154 in the “Set Column Properties” chapter.
To include marginal statistics:
To add marginal statistics (for the grouping variables) to the output columns, click the box beside Include
marginal statistics. In addition to adding marginal statistics for each grouping variable, JMP adds rows at
the end of the table that summarize each level of the first grouping variable. For example, proceed as follows:
1. Open the Companies.jmp sample data table.
2. Select Tables > Summary.
3. Select Profits ($M) and click Statistics.
4. Select Mean.
5. Select Type and Size Co and click Group.
6. Select Include marginal statistics.
7. Click OK (or Create). See Figure 8.3 at left.
Figure 8.3 Summary Table with and without Marginal Statistics
Compare the summary table with marginal statistics (at left) to the summary table without marginal
statistics (at right). You can see that the marginal statistics are added, and a row showing that there are 32
total Computer and Pharmaceutical companies.