Description of the Subset Window 

Subset by	To subset by the levels of a column, select Subset by and select the columns that you want to categorize for the subset. Consider the fact that many new data tables might be created. A new data table appears for each level of the column that you specified in the Subset window.
All Rows	Creates a subset table that contains all rows from the active table.
Selected Rows	Creates a subset table that contains only the selected rows from the active table.
Random - sampling rate	Creates a subset table whose data is a random proportion of the active data table. Enter the proportion of the sample that you want in the text box. For example, if you want a random 50% of the data to be included in the new table, enter 0.5 in the text box.
Random - sample size	Creates a subset table whose data is a random sample of the active data table. Enter the size of the sample that you want in the text box. For example, if you want 16 random rows to be included in the new table, enter 16 into the text box. If you select a random sample that is the entire source table, the result is a random shuffle of the rows of the data table. If you specify columns to stratify, the result is a random shuffle of each of the rows for each group. See Stratified Subsets.
All columns	Creates a subset table that contains all columns from the active table.
Selected columns	Creates a subset table that contains only the selected columns from the active table.
Keep by columns	Retains the column that you subsetted by in the output data tables.
Output table name	To give a name to the subset table, type a name in the box beside Output table name.
Link to original data table	To keep the subset table linked to the original table, click the box beside Link to original data table. When you change values in one table, the other table is updated.
Copy formula	To include formulas from the original table in the output columns, click the box beside Copy formula. Include all columns needed for the calculation of the formula.
Suppress formula evaluation	To prevent JMP from evaluating columns’ formulas when the new table is created, click the box beside Suppress formula evaluation.
Save Default Options	To save your current settings, select Save Default Options. Note: Save Default Options only saves the settings for Selected Rows, Selected Columns, Linked to original data table, Copy formula, and Suppress formula evaluation.
Keep dialog open	To keep this window open after clicking OK, check the box beside Keep dialog open.