Let’s say that you have a dataset that is one hot encoded like the following observation:

```
import numpy as np
obs = np.array([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0])
```

The easiest way to reverse one-hot encode the structure, is to take the `argmax`

of the observation.

```
reverse_encoding = np.argmax(obs)
# 13
```