dt << Split(

	Split( columns ),

	// the column to split (required)

	Split by( column ),

	// the column to split by (required)

	Group(column),

	// split data within groups

	<Private>|<Invisible>,

	// resulting table is private or invisible

	Remaining Columns( Keep All | Drop All | Select( columns ) ),

	/* specify what to do with the remaining columns in the resulting table (Keep All by default) */

	<Copy formula( 0|1 )>,

	/* include column formulas from the source table in the resulting table (default is 1, true) */

	<Suppress formula evaluation( 0|1 )>,

	// stop any copied formulas from being evaluated (default is 1, true)

	Sort by Column Property( "Value Ordering" {"string", "string"} | "Row Order Levels" ),

	/* sorts the order of resulting columns by the specified

	property (must be specified on the Split by column) */

	Output Table( "name" ));

	// generate the output to the table name specified

dt = Open( "$SAMPLE_DATA/Big Class.jmp" );

dt << Stack(

    Columns( :weight, :height ),

    Source Label Column( "ID" ),

    Stacked Data Column( "Y" ),

    Name( "Non-stacked columns" )( Keep( :age, :sex ) ),

    Output Table( "Stacked Table" )

);

dt2 = Data Table( "Stacked Table" );

dt2 << Split(

	Split( Y ),

	Split by( ID ),

	Output Table( "Split" ) );