I have a simple COUNTIF task in Excel that is proving rather difficult to replicate in Tableau...
This is the data:
ID Metric Scope DynamicCalc
1 A1 TRUE X
1 B1 FALSE X
2 B1 TRUE X
2 A1 FALSE X
2 C1 FALSE X
The column 'DynamicCalc' should have the following values when Metric=A1 is selected: TRUE,TRUE,FALSE,FALSE,FALSE but if say B1 is selected it would be FALSE,FALSE,TRUE,TRUE,TRUE... so basically I want to assign a value of TRUE to the DynamicColumn if there is at least one TRUE in the Scope column to all rows for that ID.

The
LODExpression can be used to retrieve your desired result try using acalculated fieldlike below :When the Selection is B1 :