Suppose that there are n rows and that the three proportions are p1, p2, and p3. The values are generated as follows:
 – Each row is assigned a random uniform value between 0 and 1.
 – The rows are ordered according to their random uniform values.
 – The rows corresponding to the smallest Round(np1) random uniform values are assigned the first value, the rows corresponding to the next smallest Round(np2) random uniform values are assigned the second value, and the remaining rows are assigned the third value.
 1 Next to Data Type, make sure Numeric is selected.
 2 Next to Initialize Data, select Sequence Data.
 3 In the From and To boxes, assign a starting and ending point.
 4 In the Step box, assign the sequence.
 5 (Optional) In the Repeat each value N times box, enter the number of times that you want each numeric value repeated.
 6 Click OK.
For example, if you want the column to contain even numbers from 2 to 60, type 2 in the From box, 60 in the To box, and 2 in the Step box.
 1 Next to Data Type, make sure Character is selected.
 2 Next to Initialize Data, select Sequence Data.
 3 In the box next to Add, enter the character data and click Add.
 4 (Optional) In the Repeat each value N times box, enter the number of times that you want each character value repeated.
 5 Click OK.

Help created on 7/12/2018