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jti 0.8.4 (2022-04-11)

• A vignette is now included

jti 0.8.3 (2022-02-07)

• A bug fix in jt_nbinary_ops and new triangulation methods.

jti 0.8.2 (2022-01-27)

• Unity smoothing and unity propagation is now implemented.
• jt_binary_ops breaking api slightly. The algorithm is now much faster though.

jti 0.8.1 (2021-09-28)

• compile gets a new argumen initialize_cpts in order to speed up computations when insertion of evidence at CPT level are of interest.
• New function initialize to initialize an object from compile if initialize_cpts was set to FALSE
• pot_list deprecated. Use cpt_list for both BNs and MRFs

jti 0.8.0 (2021-07-05)

• jt_nbinary_ops more than twice as fast.
• New constructor pot_list for markov random fields which is more efficient and idiomatic
• If joint_vars is specified, the root node is automatically set to the clique where these variables are located. Hence, one only needs to collect to query probabilies about these variables
• If the entered evidence implies inconsistencies, the jt algorithm now proceeds assuming a uniform prior distribution on the affected tables. In this regard, one can not query the evidence since it has no meaning. The print method flags if there are inconsistencies and it can be obtained by has_inconsistencies. This new feature means, that jti can now also be seen as a “machine-learning” algorithm that can be very useful in connection with class-prediction e.g.
• Because of the many big changes, the version number has bumped from 0.7.1 to 0.8.0

jti 0.7.1 (2021-05-21)

• A small bug fixed for working with undirected graphs
• new_mpd renamed to mpd. Works on cpt_list objects now.
• triangulate method for cpt_list objects.
• A new heuristic, evidence, for triangulation.
• Better performance when inserting evidence in general since redundant information is now removed.
• New function jt_binary_ops for calculating the number of binary operations to perform a full message passing

jti 0.7.0 (2021-04-03)

• Evidence can now be entered in the compilation process.
• Optimized propagation by avoiding all those unity tables. That is, when a message is sent to a unity table no multiplication is performed; the updated potential just becomes the message.
• A procedure, mpd for finding maximal prime decompositions is now include included
• It is now possible to triangulate a graph before compilation in order to investigate the size of the cliques etc.
• Triangulation is orders of magnitudes faster now.

jti v0.6.0 (2020-12-16)

• There was a bug in the creation of the junction tree when calling Kruskals algorithm.

• It is now possible to specify variables of interest in advance, such that we are guaranteed to be able to query the joint pmf of these variables.

• Some refactoring making compilation much faster. When potentials is assigned to a clique we no longer start by creating a unity table and then multiply. This was killing the advantage of the sparsity.

jti v0.5.2 (2020-11-24)

• A new way of entering evidence that is much more robust

jti v0.5.1 (2020-11-13)

• A more optimal triangulation method has been implemented, which in general leads to faster run time of the jt function.
• Some mis-spelled words fixed

jti v0.5.0 (2020-11-09)

• Initial version

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.