---
file_format: mystnb
kernelspec:
  name: python3
---

(identity_func)=
# Identity

The identity "detrending" simply returns the input time series without any modification. It should only be used for testing or if the data is already detrended.

```python
from delaynet.detrending_methods import identity

# Apply identity detrending (no change)
detrended_ts = identity(time_series)
```

```{warning}
The identity function is not a true detrending method. It simply returns the input time series unchanged.
```

(link_to_method)=
```{eval-rst}
.. automethod:: delaynet.detrending_methods.identity
    :noindex:
```