I have a Deneb visual in PowerBI, with vega-lite. I want to aggregate in a new column the text values from the data rows the user have selected (or all if no data row is selected).
For a better understanding of what I want to achieve, here is the data table in its primary state, with no data points selected:
| Key | Value to concatenate | Concatenation (new column) |
|---|---|---|
| A | valueA | valueA, valueB, valueC |
| B | valueB | valueA, valueB, valueC |
| C | valueC | valueA, valueB, valueC |