# Release 9.0

April 27, 2021

The main improvement of the HUGIN software in version 9.0 is a new Look & Feel experience of the HUGIN Graphical User Interface and associated updates. In addition, users may experience a smoother installation experience on the Windows and macOS operating systems.

## HUGIN Graphical User Interface v9.0

The HUGIN Graphical User Interface has been improved with various new features. These include:

- New Look & Feel implemented across all supported platforms (Linux, macOS, and Windows)

    - Drag & Drop to open a file

    - Improved PDF export

    - The layout of the menus and the toolbar has been refactored

    - Dark and white themes are now available for the GUI. Themes can be swapped in the preferences menu.

    - Node edges are significantly more smooth

    - New modern icons that are bigger and transparent to support the new themes and larger resolutions

- Improvements to the Data Frame functionality

    - Menu item to create a new empty DataFrame

    - Double-click on a row also takes values of function nodes in the corresponding case into consideration

    - New Moment Statistics Dialog

    - New Statistical Measures of Error Dialog

    - The implementation of the batch propagation functionality of the Data Frame has been improved. This includes the addition of a set of new measures that can be computed after the propagation of a case, e.g., variance and standard deviation of a numeric node.

- Store size of instance nodes and relative positions of interface nodes

- Feature Selection Analyzer now supports continuous nodes as target

- Tables are not created for chance nodes when leaving the Structure Learning Wizard

- macOS: The Hugin GUI application is now provided in two separate packages — with native support for M1 and Intel Macs, respectively.

- Other minor improvements

Finally, work has been done to improve the performance of the HUGIN Graphical User Interface.

## HUGIN Decision Engine v9.0

The HUGIN Decision Engine has been extended with the following features:

- CSV representations of data sets can now be generated as text strings. These strings can be parsed by the usual functions for parsing DataSet specifications.

- A new “variance” operator is available for use in expressions in models for function nodes

- The Hugin Web Service API now supports OpenJDK

- The HDE for macOS is now universal — with native support for the ARM64 and x86_64 architectures.