I have an accuracy measure, given as a percentage, for each customer, and I want to be able to show (in a matrix) what that percentage would be if I remove a particular item from the calculation.
For example, suppose the measure for Customer A is 75% across all items, but if Customer A bought none of Item 1, it would be 78%, and if they bought none of Item 2, it would be 64%. I want this:
| Item | Total Accuracy | Accuracy with Item Removed |
| Item 1 | 75% | 78% |
| Item 2 | 75% | 64% |
