You can use a zone matrix to calculate a main zone matrix. The matrix values of zones belonging to the same main zone are added up and the results are stored in a main zone matrix (Fundamentals: Converting zone and main zone matrix into each other).
1. On the toolbar, click the 
Open 'Procedure sequence' window button.
The Procedure sequence window opens.
2. To the procedure sequence, at the position of your choice, add the Matrix aggregation procedure of the Matrices category (Setting up and starting the procedure sequence).
3. In the row of the inserted procedure, click the button in the Reference object(s) column.
The Select matrix window opens.
4. In the list box, click the main zone matrix you want to save the aggregated values to. Here, two methods are provided (Selecting matrices).
| Element | Description |
|---|---|
|
Select matrix directly |
From the list of all matrices, select the desired matrix by its number. |
|
Select matrix by properties |
Select a matrix by certain attributes and their values. |
5. Confirm with OK.
The selected matrix is listed in the Reference object(s) column.
6. Make sure the added procedure is highlighted. Then, in the Operations section, click the Edit button.
The Select matrix window opens.
7. In the list box, click the zone matrix with the data you want to aggregate. Here, two methods are provided.
| Element | Description |
|---|---|
|
Select matrix directly |
From the list of all matrices, select the desired matrix by its number. |
|
Select matrix by properties |
Select a matrix by certain attributes and their values. |
8. Select the desired calculation function according to which the matrix values are to be aggregated.
| Element | Description |
|---|---|
|
Function |
Minimum The displayed value is the lowest of the aggregated matrix values. Maximum The displayed value is the highest of the aggregated matrix values. Average value (arithmetic) The displayed value is the average of the aggregated matrix values. Sum The displayed value is the total of the aggregated matrix values. Average value (weighted) The displayed value is a mean value of the aggregated matrix values, with the matrix values weighted by an OD pair attribute. |
|
Weighting attribute |
If you have selected the Average value (weighted) option, select the OD pair attribute according to which the values to be included in the calculation are to be weighted. |
9. Confirm with OK.
10. Execute the procedure (Executing procedures in the procedure sequence).
The values of the zone matrix are added together and the result is saved to the main zone matrix selected.
