//
//Restoring table data to freqency data which may be divided number by 2 class.
//
//Quation
//This command needs table data which consists items and class
//

//Syntax  
untable item_1-6 by class;

//
//Options
//
method=all     //view lack record as symobol '?' if there is lack value on the record.
method=omit  //(defalut) omit lack record which has lack value. 

//
//Example
// 
//Read table data.
//This command restores the table data to 3 record data which has class and item and frequency.
//
hand user item_1-6/
Ken 1 5 ? 2 4 ?
Lee 4 2 ? 5 1 2
Meg 2 4 3 ? ? 5
Nan 2 4 ? 5 1 ?
;
//
//restore table data to record data which is consisted by class and item and score. 
//
untable item_1-6 by user/
method=all
;
get freq@ana;