When you use the correct short-integer format for your data, you do not see any difference in how the numbers appear. However, the numbers occupy less disk space and use less memory. Short-integer formats must be activated in preferences to appear in the Column Info window.
To make short-integer formats available in the Column Info window
1. Select File > Preferences and click Tables.
2. Select Allow short numeric data format.
3. Click OK to return to the data table.
To store numeric data in a short-integer format
1. Right-click above the column name whose values you want to be short-integer then select Column Info.
The Column Info window appears.
2. From the Subtype menu, select 1-byte integer, 2-byte integer, 4-byte integer, or 8-byte floating, which is the default.
JMP stores values as integers in the range that you selected. The following numbers are examples:
• For 1-byte integer, the range of numbers that you can enter is from -126 to 127.
• For 2-byte integer, the range of numbers that you can enter is from -32,766 to 32,767.
• For 4-byte integer, the range of numbers that you can enter is from -2,147,483,646 to 2,147,483,647.