# Distance Transformation¶

Transforms distances in a data set.

## Description¶

The **Distances Transformation** widget is used for the normalization and inversion of distance matrices. The normalization of data is necessary to bring all the variables into proportion with one another.

- Choose the type of Normalization:
**No normalization****To interval [0, 1]****To interval [-1, 1]**- Sigmoid function: 1/(1+exp(-X))

- Choose the type of Inversion:
**No inversion****-X****1 - X****max(X) - X****1/X**

- Produce a report.
- After changing the settings, you need to click
*Apply*to commit changes to other widgets. Alternatively, tick*Apply automatically*.

## Example¶

In the snapshot below, you can see how transformation affects the distance matrix. We loaded the *Iris* data set and calculated the distances between rows with the help of the Distances widget. In order to demonstrate how **Distance Transformation** affects the Distance Matrix, we created the worflow below and compared the transformed distance matrix with the “original” one.