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Having done this ... how can you update a column in a DataFrame ?

I was able to load a CSV into a TabularData based SwiftUI app -- loading and displaying was no issue ... but, HOW to update a value in a column. I created a bindable textfield for the columns in the table, and it displays the value for the rows/columns, and while the code to update the column compiles, it never updates the value in the DataFrame. Is a DataFrame read only ?

Thanks Eskimo for this ... I will apply the changes as you outlined !

Did not work .... the data table, is creating a dynamic field, based on the contents it is loading: @ViewBuilder func createKeyField(row :DataFrame.Rows.Element, columnName :String) -> some View { let binding = Binding( get: { dbModel.getColumnValue(row :row, columnName :columnName) }, set: { dbModel.setColumnValue(row :row, columnName :columnName, value :$0) } ) TextField("", text: binding) } func setColumnValue(row :DataFrame.Rows.Element, columnName :String, value :String) { data[columnName][row.id] = value } but the value does not get changed

That's correct - and while using Observables for the model, when I key in the text field, you see the value, but immediately the entire table refreshes.