I have a dataset and I want to skip the first row and subtract the one which is above
Example:
Output:
| value | new value |
| 12 | 12 |
| 13 | 1 |
| 23 | 10 |
| 56 | 33 |
So skip the first row and put the value which is in the value column, for the rest of the row subtract the value above ex 13 -12 = 1 and 56-23 = 33