You can enter customized coloring for data within a group. To do this, add a sixth entry to each data point row that contains a number reflecting the relative color scaling within the group.
Some possibilities are:
- All points have the same color, in which case they would all have the same number entered in the color slot.
- All points have the same color (same number value) except one point that is colored differently (a different number value).
- The points in a group have gradated colors. This means this sixth entry in each data row would contain spaced numbers as calculated by you in a separate program like a spreadsheet.
Note that to use customized colors, you must still place an entry for the “Group” slot in each data row. If all your data is in one group, you can just enter the same value — for instance “1” or “A” — in this position.
Customized color entries only are applied in the 3D scatter plot. In a linear regression, groups are still colored separately, but the color of each data point reflects its distance from the regression plane (i.e., the residual).