This webpage contains updates for various beta and development versions of the Hugin GUI. Please note that these updates are unofficial. Downloading and installing any of these updates is at the user's own risk. HUGIN Expert A/S does not provide any support for these updates.

HUGIN HiTS/ISAC
HiTS/ISAC is an research & development project funded by the European Commission. HUGIN plays the role of technology provider in this project.

The current list of implemented functionality includes:

• JDBC interface for loading and storing data
• Parameter sensitivity analysis

Change log for Hugin HiTS-ISAC
The updates from build 6800 are the following:

Changes from Build 7000 to Build 7001:

• An effort has been made to improve the speed of the database connectivity.
• Improved the Analysis Wizard. For instance, added functionality to view data for columns not represented in the model as variables in the Analysis Wizard.
• Bug fixes and Other small improvements

Changes from Build 6909 to Build 7000:

• Views added to list of tables in database connections
• Bug fixes
• Other small improvements
• Included functionality from the official release 6.9

Changes from Build 6906 to Build 6909:

• Bug fixes
• Other small improvements

Changes from Build 6904 to Build 6906:

• The analysis is now only performed for nodes in the sensitivity set. This has corrected some rounding errors
• Other small improvements

Changes from Build 6800 to Build 6904:

• Color map included in the CPT shown in the parameter sensitivity analysis dialog
• Preliminary version of a sensitivity set graph dialog included
• Multiple adjustments and improvements to the parameter sensitivity dialog have been made
• Corrected an error in the API implementation of parameter sensitivity analysis

HUGIN BIOTRACER
BIOTRACER is an research & development project funded by the European Commission. HUGIN plays the role of technology provider in this project. As part of providing technology new functionality will be developed for the HUGIN software.

The current list of new functionality implemented includes:

• New distributions in the Table Generator including the LogNormal, PERT and Triangular distributions
• Support for automatic discretization of continuous variables
• Density view mode in monitor windows for IntervalDCNodes
• Parameter sensitivity analysis

Change log for Hugin BIOTRACER
The updates from build 6800 are the following:

• VOI analysis now supports CG nodes as indicators
• What-if Analysis with continuous evidence (compute posterior beliefs with mu + minus some number of standard deviations )
• Analysis Wizard: enabled "Accuracy" pane in CG networks
• Fixed: bug related to the use of case counts in data files
• Status Bar now displays the size of the policy for a selected decision node
• Status Bar now displays the size of the utility function associated with a selected utility node
• Flip network layout upside down: Network->Flip network
• Introducing OOBN EM: EM Learning wizard now enabled for OOBNs as well (feature is working, but still under development).

• Corrected bug in the States Generator Panel. A Class Cast exception was throws while launching the States generator panel for a node that has two parents and at least one of them is a Discrete Decision Node.
• corrected bug! Log files where locked by windows even after the corresponding project frame was closed in the gui.
  
• Bug in the DataAcquisition panel in the Learning Wizard when trying to open a file with invalid format. Corrected!
• Bug correction! Closing all frames by selecting in the menu "Windows --> Close All" would throw a null pointer exception.
  
• Data preprocessing panel (Learning wizard, Em wizard, etc) : The user can now choose between UTF-8 and iso-8859-1 encoding when opening a .dat file.
  
• Corrected a Null Pointer Exception bug that occured occationally in the Node States Generator Panel.
• Conflict analysis - reporting resolution hypothesis and partial conflict to usage log
• Corrected bug in the States Generator Panel. A Class Cast exception was throws while launching the States generator panel for a node that has two parents and at least one of them is a Discrete Decision Node.

• Parameter Sensitivity Analysis with two inputs from one CPT.
• Parameter Sensitivity Analysis with two inputs from two different CPTs.
• Computing Sensitivity on multiple cases from a case file in Parameter Sensitivity Wizard.
• Support for computing the k-most probable configurations has been included in the Joint Analysis Dialog using a Monte Carlo based algorithm.

• Learning Wizard: Discretization using Information Entropy Minimization (U. M. Fayyad and K. B. Irani. 'Multi-Interval discretization of continuous valued attributes')
  
• Allowing the creation and parsing of invalid Expressions in the Expression Builder Wizard.
• Computing Senssitivity on multiple cases from a case file in Parameter Sensitivity Wizard.

Changes from Build 7001 to Build 7002:

• Min - Max Sensitivity value color maps in Parameter Sensitivity Analysis.
• Support for selecting a sensitivity line to display in the graph when performing Parameter Sensitivity analysis for all states.
• The hypothesis variable combo box is rendered to visually show nodes with evidence (Parameter Sensitivity Wizard).
• Displaying the upper and lower bounds of the sensitivity lines (Parameter Sensitivity Wizard).
• Allowing the Parameter Sensitivity Analysis for influence diagrams with instantiated decision nodes.
• A new Tab in the Parameter Sensitivity Wizard (Constraints) for supporting user specified constraints. Supports a one event constraint, a two event difference constraint and a two event ratio constraint and allows the user to manually implement the changes or automatically adopt them. It supports the specification of one or two constraints.
• When inserting parent nodes in an expression their types (Boolean, Labelled etc.) are displayed (Expression Builder Wizard).
• Fixed bug inserting parents in an expression when building a Distribution or a NoisyOr expression (Expression Builder Wizard).
• Parsing an expression written in edit mode when returning to build mode so the tool can use its arguments in the argument fields (Expression Builder Wizard).
• Added help pages to Expression Builder and Parameter Sensitivity Wizards.

Changes from Build 7000 to Build 7001:

Build date: 24 January 2008

• Correlation analysis dialog
• Joint Dialog with relaxed requirement on network to allow analysis when all decisions are instantiated
• Color map in parameter sensitivity analysis display parameter sensitivities instead of parameter values.
• When opening a file with unknown extension, the file may optionally be probed for a net,oobn or hkb description

Changes from Build 6906 to Build 7000:

• Parameter sensitivity analysis added
• Monitor windows now display mean and variance for numerical nodes
• Included functionality from the official release 6.9

Changes from Build 6905 to Build 6906:

• Expression builder now supports bar mode and pure bar mode display of table content
• Bug related to displaying the "table" of a decision node fixed
• Bug related to reordering parents of utility nodes fixed
• "show as table" always enabled

Changes from Build 6904 to Build 6905:

• The analysis wizard will display state labels or state values depending on the node settings
• Other small improvements

Changes from Build 6803 to Build 6904:

• "truncate" operator for distributions taking the form truncate ([lower value], <Distribution>, [upper value]). An example is "truncate (-4, Normal (0,1), 4)" which truncates the normal distribution at -4 and 4, respectively. Either the lower or upper value may be left unspecified
• Improved discretization dialogs (both edit and run mode)
• Bitmap view of a CPT. A white pixel is a zero value.
• Preliminary version of a revised Table Generator implementation. The revised Table Generator eases the specification of expressions and is more intuitive

Changes from Build 6802 to Build 6803:

• Calculation of mean and variance of numerical nodes when selected
  
• Belief bar resizing in Node List
• Equi distant discretization in run mode
• Show mean calculation in User Log
• It is now possible to have a mixture of type in "if"-expression, e.g., it is possible to specify the following expression
  "if (X>0, Normal (160,100), 0)"
  
• It is possible to discretize an interval node with evidence where the evidence has been entered as a value (as opposed to selecting a state)

Changes from Build 6800 to Build 6802:

• Restore original discretization