If you don't need the selections, you can also use formula / summary (or many other options)

```
Names Default To Here(1);
dt = Open("$SAMPLE_DATA/Big Class.jmp");
// Option1
new_col = dt << New Column("R1", Numeric, Continuous, Formula(
If(Row() == Col Min(Row(), :age), :age, .)
));
dt << Run Formulas;
new_col << Delete Formula;
// Option2
dt << New Column("Row", Numeric, "Continuous", Formula(Row()));
dt_summary = dt << Summary(
Group(:age),
Min(:Row),
Freq("None"),
Weight("None"),
statistics column name format("column"),
Link to original data table(0)
);
dt_summary << Delete Columns("N Rows");
Column(dt_summary, 1) << Set Name("R2");
dt << Update(With(dt_summary), Match Columns(:Row = :Row));
Close(dt_summary, no save);
```

-Jarmo