Hello.
I´m working with some data to correlate year, population and city, as shown in the sketch attached below.
But, after retrieving my DB, selected the "Line" type and selected the values for X and Y, but the option "color group" is not available for me.
How can I solve this?


Strange....
Have you got the last RapidMiner release (RM 9.3.1) ?
If not, can you update RapidMiner to this last version ?
Regards,
Lionel