# onetick.py.Operation._\_neg_\_

#### Operation.\_\_neg_\_()

Return the negative value of float or int column.

### Examples

```pycon
>>> t = otp.Tick(A=1, B=2.3)
>>> t['A'] = -t['A']
>>> t['B'] = -t['B']
>>> otp.run(t)[['A', 'B']]
   A    B
0 -1 -2.3
```