For attributes calculated by assignment or line costing, the Visum display mode distinguishes between the following types of the attribute value zero:
- Attributes which are undefined, have not been calculated and thus have the attribute value 0: These undefined output attributes are displayed as empty strings.
- Attributes which are defined, have been calculated in the network version and have the attribute value 0 as a result: These defined output attributes (calculated attribute value 0) are output as digit 0.
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Note: In internal calculations (for example in filters), attributes not yet calculated are still regarded as zeros. When setting a filter, you thus always have to enter the digit 0 as upper and lower limit of the value range. |
