Using JMP - SAS

242 Summarize Data Chapter 8
Tabulate Data
Elements of a Table in Tabulate
In Tabulate, a table is defined by its column headings and row labels. They are referred to as the column
table and the row table. For a description of column tables and row tables, see “Column Tables and Row
Tables” on page 248.
Grouping Columns
Grouping columns are columns that you want to use to classify your data into categories of information.
They can have character, integer, or even decimal values, but the number of unique values should be limited.
Note the following:
• If there is more than one grouping column, Tabulate constructs distinct categories from the hierarchical
nesting of the values of the columns. For example, from the grouping columns Sex with values F and M,
and the grouping column Marital Status with values Married and Single, Tabulate constructs four
distinct categories: F and Married, F and Single, M and Married, M and Single.
• You can specify grouping columns for column tables as well as row tables. Together they generate the
categories that define each table cell.
• Tabulate does not include observations with a missing value for one or more grouping columns by
default. You can include them by checking the Include missing for grouping columns option.
• To specify codes or values that should be treated as missing, use the Missing Value Codes column
property. You can include these by checking the Include missing for grouping columns option. See
“Missing Value Codes” on page 153 in the “Set Column Properties” chapter.
Analysis Columns
Statistics
Analysis columns are any numeric columns for which you want to compute statistics. They are usually
continuous columns. Tabulate computes statistics on the analysis columns for each category formed from
the grouping columns.
Note that all the analysis columns have to reside in the same dimension, either in the row table or in the
column table.
Tabulate supports a list of standard statistics. The list is displayed in the control panel. You can drag any
keyword from that list to the table, just like you do with the columns. Note the following:
• The statistics associated with each cell are calculated on values of the analysis columns from all
observations in that category, as defined by the grouping columns.
• All of the requested statistics have to reside in the same dimension, either in the row table or in the
column table.
• If you drag a continuous column into a data area, it is treated as an analysis column.
Some of the keywords used in Tabulate are defined below. A comprehensive description is listed in
“Explanation of Statistics” on page 238.