# {py:mod}`elasticai.preprocessor.transformation.transformation`

```{py:module} elasticai.preprocessor.transformation.transformation
```

```{autodoc2-docstring} elasticai.preprocessor.transformation.transformation
:allowtitles:
```

## Module Contents

### Functions

````{list-table}
:class: autosummary longtable
:align: left

* - {py:obj}`do_fft <elasticai.preprocessor.transformation.transformation.do_fft>`
  - ```{autodoc2-docstring} elasticai.preprocessor.transformation.transformation.do_fft
    :summary:
    ```
* - {py:obj}`do_fft_withimag <elasticai.preprocessor.transformation.transformation.do_fft_withimag>`
  - ```{autodoc2-docstring} elasticai.preprocessor.transformation.transformation.do_fft_withimag
    :summary:
    ```
* - {py:obj}`do_fft_inverse <elasticai.preprocessor.transformation.transformation.do_fft_inverse>`
  - ```{autodoc2-docstring} elasticai.preprocessor.transformation.transformation.do_fft_inverse
    :summary:
    ```
````

### API

````{py:function} do_fft(y: numpy.ndarray, fs: float, method_window: str = 'hamming') -> tuple[numpy.ndarray, numpy.ndarray]
:canonical: elasticai.preprocessor.transformation.transformation.do_fft

```{autodoc2-docstring} elasticai.preprocessor.transformation.transformation.do_fft
```
````

````{py:function} do_fft_withimag(y: numpy.ndarray, fs: float, method_window: str = '') -> tuple[numpy.ndarray, numpy.ndarray]
:canonical: elasticai.preprocessor.transformation.transformation.do_fft_withimag

```{autodoc2-docstring} elasticai.preprocessor.transformation.transformation.do_fft_withimag
```
````

````{py:function} do_fft_inverse(y: numpy.ndarray, len_original: int) -> numpy.ndarray
:canonical: elasticai.preprocessor.transformation.transformation.do_fft_inverse

```{autodoc2-docstring} elasticai.preprocessor.transformation.transformation.do_fft_inverse
```
````