list of changes

there is also an (incomplete) list of planned features for the next releases

released 2010-06-28. Error fixes:

• [IO] resolved a problem when loading/saving graphs.
• [IO] resolved a problem that caused image exports to be too large.
• [GUI] Templates now incorporate label font and font-size.

released 2010-06-17. New features:

• [GUI] Templates: Added legend functionality. For any node or link templates one may now specify to show them in a draggable legend. Moreover, templates are stored now with each network in the .graphml file (checkbox 'local'), and/or stored globally in visone configurations file (checkbox 'global').
• [GUI] Network collections: Network collections provide the possibility to semantically encapsualte a (sub)set ot the currently opened networks. Currently, this needs to be done for dynamic layouts or RSiena functionality. Network collections are administrated via the network collection manager button in the visone toolbar. Please note that while a network is part of a collection it may not be edited anymore (node/link insertion/deletion).
• [IO] RSiena session files may now be loaded via the open dialog. A network collection is automatically created with a name given by the user.
• [Analysis - RSiena] RSiena integration: Interface for analyzing network collections with RSiena directly from within visone. Options for R-connection have to be properly set in file → options → R - connection.
• [Visualization - Layout] Dynamic layout: Networks in a collection may be laid out together by an dynamic layout approach using anchored stress minimization. The reference network to anchor with may be selected as either one of the collection, a newly created aggregation network, or the previous network in sequence of the collection.
• [Visualization - Geometry] Procrustes analysis: A procrustes transformation can be applied to the networks of a network collection. This operation tries to translate and optionally rotate/dilate a network layout such that it best fits the given reference network.
• [GUI] Animation player: The networks of the currently active network collection may be interactively animated. Accessible via the animation player button in the toolbar.
• [GUI] Zoom: Fit all networks button zooms each open network such that all networks have a common viewport.

Error Fixes:

• [GUI] Undo/Redo: Disabled for now due to unpredictable behavior. We hope to bring a stable Undo/Redo back as soon as possible.

released 2009-08-25. New features:

• [Attributes] It is now possible to import edge attributes into the network by an adjacency matrix in csv format, similar to graph import by adjacency matrix. See Attribute Manager → Edges → Export & Import. Row/Column-labels may be used to match rows/columns to the ids of the nodes in the network.

Error Fixes:

• [Visualization - Layout] Centrality Layout now keeps the size of the nodes when applied more than once.
• [Visualizaation - Layout] Status Layout now optionally provides drawing of status niveaus.
• [IO] Background information, i.e., radial/status niveaus are now exported with the graph.

released 2009-06-30. New features:

• [Analysis] Integration of SIENA. Available through the analysis tab in section modelling. Does work for Windows and Linux.
• [Attributes] Enhanced attribute inspector to attribute manager. Includes all operations for inspecting, configuring, manipulating, importing and exporting attributes (some of the functionality was previously accessed through the nodes and links menu). Can be started by the button in the toolbar or by the button in the selections tab.
• [Data] Basic support of hierarchical networks: Nodes may be grouped/ungrouped together by right-clicking a selection and applying 'group'/'ungroup'. I/O supported when graphML is used. Nodes may be grouped by attribute values automatically in the transformations tab with the section 'nodes → group by attribute'. Note: Analysis algorithms are applied to the current state of a hierarchical graph, i.e. if a group node is in collapsed state, centralities, for example, will be calculated for the group node and not its children.
• [Transformation] Bibliographic operations in the network section, i.e. squaring the adjacency matrix A, bibliographic coupling (A x A^T) and co-citation (A^T x A).
• [GUI] Number of decimal places in any visual representation of all decimal attribute values in visone may now be configured in the 'File → Options' dialog.

Error Fixes:

• [IO] Fixed a problem with jpeg-export.
• [GUI] Draw multi-links option in the view menu now works properly.
• [GUI] Networks are now properly marked as changed when attributes change.
• [GUI] Resolved several smaller gui problems, like wrong update of overview window.

released 2009-03-06. This is a major release. Most noticeable changes:

• [Analysis] added link betweenness and centralities based on link graph. Also the link graph is now available through the transformations tab.
• [Analysis] added clustering algorithms
• [Analysis] added node distances - distance from selected sources to compute the graph theoretic distances from selected nodes. If more than one node is selected the resulting attribute is the minimal distance to one of the selected nodes.
• [Visualization - Layout] added a quick-layout, i.e. MDS and Stress-majorization, available through the quick-layout-button in the toolbar. The quick-layout is applied to all graphs generated with the random graph generators.
• [Visualization - Layout] centrality layout: a radial layout based on attribute values, e.g. centralities; previously called radial visualization
• [Visualization - Layout] added status layout: a Sugiyama-style layered layout where the layering is determined by attribute values
• [Visualization - Mapping] mapping to Coordinates - Cartesian: either y- or x-axis positions are assigned according to a given node attribute
• [Attributes] added the attribute inspector, a tool to inspect all attributes of (the current selections on) the active network
• [Attribute] new attribute operation rank computes the ranking of the elements according to attribute values

There are also a number of changes to the user interface:

• new common visualization tab contains all methods from the layout menu, the geometry tab, and the old visualization tab
  • layout: all graph layout algorithms from the layout menu, e.g. random, MDS, stress, link routing, and label placement. Options are initially hidden from the user since most likely there is no need to specify them.
  • mapping: all visualizations of attribute values, e.g. coloring, size, position
  • geometry: translation, rotation, and scaling operations
• transformation tab: contains link transformations and link graph
  • link transformation: the transformations previously found in the links menu, e.g. simplification, merging of edges
  • link graph: creates a graph with a node for each link. This graph is internally used for some of the link centralities.
• attributes tab: previously called selections, contains a new button to start the attribute inspector
• templates: template functionality is now found in the nodes and links menus

released 2008-06-25. Error fix:

• [IO] on Windows systems saving to already existing files did not work

released 2008-04-22. Error fixes:

• [Analysis] fixed an error in the algorithm for strongly connected components (thanks to Ivan Ricotti for reporting)
• [IO] added all missing export formats (EMF, EPS, and SWF) to the Web Start version

released 2008-03-03. Error fix:

• [IO] on Windows systems saving erroneously appended the date to the filename

released 2008-02-13. Error fixes:

• [GUI] attribute dialog: change the type of an attribute properly
• [GUI] color chooser button: works now in the selection dialog and in the visualization panel
• [GUI] selection dialog: decimal attributes can now be used

released 2008-02-11. Error fixes:

• changed requirements from Java 6 back to Java 5
• [IO] export: some export formats were missing in the Web Start version
• [IO] cra import: corrected some errors
• [GUI] dialog windows: fixed some problems of open dialog windows without an open network

released 2008-01-25. This is major release. Important changes include:

• [Analysis] added current flow betweenness and current flow closeness
• [Analysis] centrality values for unweighted networks can be standardized
• [Analysis] allow edge weights for more centralities
• [Analysis] fixed some issues with centralities of weighted and non-connected networks
• [Visualization] simplified the interface and added some more basic visualizations, e.g. label size, label color
• [Visualization] improved the visualization of groups
• [Layout] added stress minimization and improved classical MDS
• [IO] export to other formats is more reliable
• … and many other fixed errors

released 2007-10-15. Error fixes:

• [IO] Attribute import and export: fixed dialog window
• [IO] Network export: added missing export formats, e.g. dl, csv

released 2007-04-27. New Feature:

• [GUI] Template panel: added controls for default direction and confirmation of links
• [Layout] Colored link: added a visualization for colored links similar to colored nodes
• [Layout] Visualization 'Color': allow color gradients to tint nodes and links

Error fixes:

• [IO] CSV files: ignore first cell if option 'merge delimiters' is not set
• [Layout] Link width: scale width according to values assigns very similar widths

released 2007-03-16. New Feature:

• [IO] Added new image export formats: EPS, EMF (WMF), and Flash SWF

Error fixes:

• [IO] csv files: import of some csv files failed
• [GUI] templates: create link templates was broken

released 2007-03-06. Error fixes:

• [IO] DL files: reading dl files created by UCINET does not work

released 2007-01-26. Error fixes:

• [Analysis] Degree centrality: in- and out-degree centrality analysis always compute degree centrality

released 2007-01-15. New features:

• [Layout] new layout algorithm Metric MDS
• [Analysis] an analysis can be performed on multiple networks simultaneously

Error fixes:

• [GUI] Properties dialog: the attribute tab shows no entries
• [GUI] Selection dialog: the dialog is not correctly updated on network changes
• [Layout] Radial layout: computing a radial layout breaks visone

released 2006-11-27. Error fixes:

• [IO] CSV import: add a file preview tab to the options dialog
• [IO] CSV files: export adds [ and ] around each line
• [IO] CSV files: import of files without row labels does not work
• [IO] CSV files: a NullPointerException is thrown
• [IO] CSV files: add presets for the most used programs
• [IO] Open Network: a new network tab appears before the open process is finished
• [GUI] Groups tab: the selected nodes/links do not match the selected lines in the groups table

released 2006-11-16. New Features:

• [Analysis] consider only confirmed or selected links for degree centrality
• [Analysis] consider only confirmed or selected links for clustering coefficient
• [Analysis] [Layout] allow the selection of an arbitrary attribute there a partition is needed, e.g. for node coloring
• [Layout] use arbitrary link width in link width visualization
• [IO] csv files: new import option 'merge empty cells' (useful for files generated by UCINET)
• [IO] csv files: sort exported matrix according to node labels
• [GUI] improved the panel for the selection of analysis algorithms
• [GUI] improved the panel for the selection of visualization methods
• [GUI] improved the panel for the selection of geometric transformations

Error fixes:

• [IO] csv files: the options dialog was not displayed
• [IO] dl files: the parser was too strict and rejected some files generated by UCINET
• [GUI] fixed some errors then no network is displayed
• [SELECTION] fixed error in substring selection

released 2006-10-27. Error fixes:

• [Layout] improved edge length in uniform layouts
• [Layout] layouts no longer insert bends
• [MISC] fixed error with Java Webstart
• [IO] fixed error in export to images

released 2006-10-26. New features and error fixes:

• [Layout] added edges of arbitrary width
• [Layout] added geometric layout transformers: scale, rotate, translate
• [IO] fixed error loading some UCINET files
• [IO] fixed error loading and saving attribute data to/from csv files
• [GUI] fixed error displaying some texts
• [GUI] fixed error in invert selection commands
• and many other small changes

released 2006-08-07. Bug fix:

• [IO] image export: paint nodes over links

released 2006-07-31. Details will follow.

released 2006-05-18. Added more analysis methods and visualization techniques.

released 2006-01-18. Bug fixes:

• [Other] all configuration files are now stored to the separate directory ”.visone”
• [Analysis] improved the clique and clan analysis algorithms
• [GUI] Templates: corrected many problems with the template lists
• [GUI] fixed an exception in “New Network” then attributes existed

released 2006-01-04. Bug fixes:

• [Other] added missing libraries
• [IO] GraphML files: fixed loading of GraphML files
• [IO] vsn files: fixed loading of vsn files saved with visone 1.1

released 2005-12-24. New features:

• [Analysis] Group analysis: added algorithms for cliques, k-cliques, k-clans
• [Other] Simplify command: combines parallel links
• [Data] Integer data type: added integer as forth data type for attributes
• [GUI] Edge confirmation: unconfirmed links are displayed with hollow arrows

Bug fixes:

• [GUI] Multi-links: draw multi-links as parallel line, not on top of each other
• [GUI] Selection dialog: improved selection by attribute values
• [GUI] Undo: now handles complex commands (i.e. layout algorithms)
• [GUI] The view should scroll then creating an edge across the windows borders
• and many more

released 2005-11-22. New features:

• [Layout] Organic layout: set good parameters for organic layout automatically
• [Layout] Circular layout: split algo in two parts, radius assignment and crossing
• [GUI] New network: use default node and link templates for displaying a new network
• [GUI] General Options Dialog: improve appearance
• [GUI] Status bar: add a status bar to the main window
• [GUI] Selection dialog: add incidence selection criteria and other improvements

Bug fixes:

• [Layout] Circular layout: the algo does not terminate
• [IO] UCINET: in some networks each node appears twice
• [GUI] Node properties: many improvements and fixes
• [GUI] Selection dialog: selection dialog does not select correct elements
• [GUI] Mouse edge selection: mouse selection box selects wrong edges
• [GUI] Zoom: the toolbar zoom box shows a wrong value

released 2005-09-20. Fixed some errors.

• [IO] UCINET: allow uppercase key words
• [IO] VSN: fixed loading/saving of .gw and .vsn files
• [Layout] Node width/height visualization: add automatic scaling (like in visone 1.1)
• [Other] fixed 'missing programText resource' exception

released 2005-09-08. Initial release.