Can we apply a rule on filter to that affects the value in parameter?

Parameters and filters are independent objects. A filter can’t directly push a value into a parameter. Parameters are static lists or single values that only change if:

1. The user manually changes them (via a parameter control).
2. A calculated field updates based on the parameter value.
3. An action (like Parameter Action) updates them from a selection in the view.

Thus, we cannot make a filter automatically update a parameter value. But we can simulate this with Parameter Actions or Calculated Fields.

Workarounds

1.Parameter Actions

• Put the dimension you’re filtering on into a sheet.
• Create a parameter with the same domain.
• Add a Parameter Action so when the user clicks a value, it updates the parameter.
• Then use the parameter in calculations or filters.

2.Filter drives Parameter-like behavior

• Create a calculated field that references the filter’s field.
• Use that calculated field wherever you would have used the parameter.
• This way, the filter indirectly controls the result.

3.Dynamic Parameter (Tableau 2020.1+)

• You can set a parameter’s default value to update based on a field (like latest date, max week, etc.) when the workbook opens or refreshes.
• But note: it doesn’t update dynamically as the filter changes, only on data refresh.