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--- a +++ b/NEWS @@ -0,0 +1,519 @@ +0.97.1 + +Various bug fixes from 0.97 + +0.97 + +USER VISIBLE CHANGES +* When a model is dumped to jags.dump, all named nodes in the model are + written. + + +INTERNAL CHANGES +* Major code reorganization with the functions, distributions and samplers + now in loadable modules. This has implications for ownership of dynamically + allocated objects, as objects created in a loadable module must also + delete them. The FuncTab and DistTab classes no longer take ownership + of functions/distributions they contain. +* The Compiler class uses static tables of distributions and functions (as + these must be accessible to loadable modules). The Model class uses + a static vector of sampler factories (for the same reason). +* When reading values from NodeArray or SymTab, a boolean function is + used to select the required nodes. The functions to read all values are + redundant - since you can supply a trival function that always returns + true - and have been removed. The Console::dumpState function takes + three different flags: DUMP_PARAMETERS, DUMP_DATA, and DUMP_ALL. The + last flag is used after an error. +* The function Node::isStochastic has been renamed Node::isVariable. + +CONFIGURATION CHANGES +* The lex/flex library is no longer linked. This was unnecessary, and + caused problems on IRIX building a shared library. + +0.90 + +BUG FIXES +* All aspects of the log normal distribution (density, distribution + function, quantile function, random samples) were incorrect due to a + mis-specification of the standard deviation, which was calculated as + the *square* of 1/tau (where tau is the scale parameter) instead of + the *square root* . +* The Chi-squared distribution is referred to as "dchisqr" in the BUGS + language and not "dchisq" as I previously assumed. +* The quantile function for the negative binomial function was incorrect. + +USER-VISIBLE CHANGES +* The following distributions have new restrictions on valid parameters + dbin(p,n) n must be discrete-valued. + +CONFIGURATION CHANGES +* Removed redundant test for lm in configure.ac, which was causing + warnings on IRIX and failures on Solaris. +* Fixed test for sunperf in acx_blas.m4 to use -xlic_lib=sunperf. + +INTERNAL CHANGES +* LeftRangeIterator and RightRangeIterator have been replaced + with a single class (RangeIterator) with member functions + nextLeft and nextRight. Counter is now a scalar RangeIterator. +* SubSetIndex is now obsolete and has been removed. +* Fixed bugs revealed by the SGI CC compiler. Unfortunately, the MipsPro + compiler refuses to do dynamic casting to an incomplete type, a + technique which was used a lot in the JAGS source. In fact + this not covered by the C++ standard (although it is supported by the + GNU compiler) so I have been forced to rewrite some of the Distribution + and Sampler code. + + +0.81 + +BUG FIXES +* Fixed out-of-range error when dumping CODA output from a subset + of a multivariate node. + +INTERNAL CHANGES +* New member functions Range::(left/right)Index which invert + Range::(left/right)Offset. +* Samplers are now created in the context of a given graph. So + many of the functions now take an extra Graph argument. +* Model::initialize is now much more efficient. It calculates + a sampling graph that excludes all uninformative nodes (i.e. nodes + with no observed descendants), so the Sampler constructors do not + have to repeatedly do the same calculation. (Thanks to Geoff Evans, + who supplied an example where JAGS was extremely inefficient) +* Node::hasDescendant has been removed as it is no longer used and + there are no bounds on its complexity. +* MixtureNode has been remodelled so that it no longer requires a + separate OffsetNode. Hence the OffsetNode and OffsetFactory classes + have been removed. SubSetIndex has been moved from the graph + directory to the compiler directory. +* SymTab now calculates the names of MixtureNodes dynamically instead + of storing them at compile time. This was very inefficient in models + with a large number of mixture nodes. +* A new sampler - Censored - samples interval-censored observations. + It is created by the ConjugateFactory. + +0.80 +BUG FIXES +* The log likelihood was not correctly calculated for unobserved stochastic + nodes with a binomial distribution. This affected the PIGS example. +* The default method for checking the parameter dimensions for real-valued + distributions (DistReal::checkParameterDim) only checked that the + _first_ parameter was scalar, e.g. in the expression "x ~ dnorm(mu, tau)", + tau could have been a vector. + +USER VISIBLE CHANGES +* New distribution "dsum" - the sum of two discrete-valued stochastic nodes. + This is another observable function, like dinterval. +* New function "rank" for calculating the ranks of the elements of a vector. + This behaves like the R function rank, rather than the BUGS version, + returning a vector of ranks. +* A deviance node is now created automatically, unless the user has + already defined a variable called "deviance". +* Unbounded discrete-valued distributions (e.g. Poisson) can be sampled + with the new Discrete Slice Sampler. + +INTERNAL CHANGES +* Nodes no longer store their name. Names are generated dynamically when + needed. +* Identical Range objects now share their memory. Range is now a wrapper + class around a new class RangeImp which implements the member functions. +* The NodeArray class is more memory efficient as it no longer uses an + internal map between Ranges and Nodes. +* Changed names of NodeArray::get and NodeArray::set to "insert" and "find", + following STL conventions more closely. +* Unused class SubSetNode removed. +* UnaryMinus function renamed to NEG +* The BUGSModel class is now used by the Compiler. It has overloaded methods + for setting and clearing monitors based on name and range. +* The parameters of a LogicalNode are set in the constructor. +* OffsetNodes are no longer constructed for 1-dimensional mixture models, + since they are redundant. +* A new Sampler class Slicer implements both the the "doubling" method + and "stepping" method for slice sampling. The previous class SliceSampler + is replaced with RealSliceSampler, which is a subclass of Slicer. + DiscreteSliceSampler and DSumSampler are both subclasses. +* Improved performance of BUGSModel::coda by avoiding unneccesary buffer + flushing from the std::endl manipulater: using '\n' instead. +* Improved performance of ConjugateNormalSampler and ConjugateGammaSampler + by reducing the number of calls to Sampler::setValue from 3 to 2. + +0.75 + +BUG FIXES +* Constant nodes can no longer be initialized. +* The command PARAMETERS IN no longer ignores initial values for nodes + that have been declared but not defined. It will give an error message + instead. +* MixtureNodes were sometimes being unnecessarily created when fixed subsets + were being taken. + +USER VISIBLE CHANGES +* Variable declaration is now optional. If you omit a variable declaration, + then JAGS will attempt to determine its dimension from the data table, + and failing this from the LHS of the relations. +* Data transformations can now be defined inside a separate data block. + See the manual for details +* In data and parameter files, attributes of R structures are now correctly + parsed. You can now dump, for example, matrices with dimnames and use + them as data or initial values. +* A new function "sort" for sorting the elements of a vector (untested). +* C-style block quotes are now allowed in model files. +* The progress bar printed during updating is longer (40 stars), and a + guide bar shows you how long it will be. The UPDATE command has a BY option + so that you can alter the refresh rate during updates. + +INTERNAL CHANGES +* Compiler changes + - The compiler classes have been split off into a new directory. + - All deterministic node subclasses, along with Constant Nodes, have their + own factory object, which is used to maximize reuse of existing nodes + when compiling the model. + These changes have led to modest speed increases, but there is a dramatic + improvement for the LEUK example which now runs 2.5 times faster. +* More file input/output moved from the JAGS library into the terminal + program +* Compiler::fillConstants is now gone. This role is taken over by + Symtab::setValue. +* The above change means that there is no need for a default constructor + for ConstantNodes, so this is now gone. All ConstantNodes have their + value set when they are constructed. +* A new BUGSModel class, which is currently unused. +* The Fortran linking fix for MacOs X has been improved. We no longer + redifine the official autoconf macros. Thanks to Bill Northcott. + +0.65 +* Modified parser and scanner in the terminal front-end to use C++ + strings instead of C character arrays. This solves a problem on + SuSE with variable and file names being mangled. +* Attempting to initialize the model before compiling it no longer leads + to a crash. +* Parse errors occuring in data and parameter files are now more clearly + indicated. +* Sampling order has been changed so that a node is always sampled before + its parents. This appears to help in problems where there is a large + transient after initialization (birats, kidney). +* Three configuration fixes for Mac Os X: We now have a modified version + of AC_F77_LIBRARY_LDFLAGS that strips lcrt1.o and lcrt2.o. We link to + -lcc_dynamic on Mac Os X. We check for BLAS and LAPACK in vecLib + using a modified version of acx_blas.m4 from Octave. Thanks to Chris + Jackson. +* The class ScalarArgScalarFunc was not necessary and has been removed. +* Samplers may now have a "burnin" mode to adapt their behaviour at the + beginning of the chain. Burnin mode is turned off when the first monitor + is set. +* The distribution of a StochasticNode is now set in the constructor. + The setDistribution member function is removed. +* The function of a LogicalNode is set in the constructor. + The setFunction member function is removed. +* The compiler has been changed so that expressions "a <- b" are handled + more efficiently. The identity function is no longer required and has + been removed. The _fast flag is no longer required in conjugate samplers. +* The algorithm in classifyNode (Sampler.cc) is more efficient as it + avoids repeat testing of the same node. +* Rmath.h is now systematically included last. This prevents problems with + symbols being redefined using the C preprocessor. +* R-style comments can now be embedded in data files. + +0.25 -> 0.50 +* Fixed a bug in DMNorm::randomsample that affected multivariate normal + variables of length 3 or more, and another bug that gave a length + mismatch error when forward sampling multivariate normal nodes. +* Fixed a bug in ConjugateMNormal sampler that affected nodes with + multivariate normal children. +* The SCHOOLS example now runs correctly. +* Created a new class SamplerFactory for creating samplers. The process + of choosing samplers is now more general and this paves the way for + samplers that update several nodes at once. +* Version number bumped up to 0.50 to celebrate beta status. + +0.24 +* Replaced the ARM sampler with a slice sampler. +* Fixed a bug in the Conjugate Normal sampler which prevented it from + recognizing cases where it could sample. This bug had also been copied + to the multivariate normal sampler. +* The two changes above give some important speed improvements. +* LICENCE CHANGE. The license is now pure GPL, with no exception for linking + with the arms software by Wally Gilks. +* ConstantNodes are now a distinct class from DeterministicNodes. +* There are now restrictions on Data and Parameter (initial value) files. + It is illegal to set the value of a logical node, as doing so may leave + the graph in an inconsistent state (which, incidentally, may put the + slice sampler in an infinite loop). The values of deterministic nodes + are now calculated internally, but you may set the values of constant + nodes in the data file, and stochastic nodes in either file. +* Distribution::checkParameterDim now checks the value as well as the + parameters, like Function::checkParameterDim. +* The abstract class DistScalar has been removed. It was not necessary. +* Fixed a bug in DMulti that only allowed the parameter p to be scalar. + DInterval should also now work with vector cutpoints. +* Fixed the ConjugateMNormal sampler, which now runs the BIRATS example + correctly + +0.23 +* The matrix exponential is now calculated by the standard method of Pade + approximation with scaling and squaring. +* The ConjugateGamma sampler now works with mixture models. Thanks to + Bettina Gruen <gruen@ci.tuwien.ac.at> for the patch. +* The "Inits" statement is deprecated, and is replaced by the "parameters in" + statement, which can be used at any time to set the value of unobserved + nodes. New statements "data to" and "parameters to" can be used to + write the data values, or current parameter values, to file. +* Fixed a bug in Model::checkGraph which prevented forward sampling of + non-informative Poisson. Thanks to Greg Ridgeway <gregr@rand.org>. +* The ParseTree class has been rewritten, with consequent changes to + the parser and compiler. +* Some minor optimizations, e.g. SArray::value is inlined. +* Functions with a variable number of arguments are now possible. + The functions min and max, and the inline functions '*' and '+' + now have variable arguments. This leads to a reduction in the number + of nodes in the graph and a consequent increase in speed (along with + the optimizations). The EPIL example now runs about 25% faster. +* Min and Max now act like the equivalent functions in R: they + take a variable number of array arguments, and will return the + maximum of all the values present in those arguments. This means + that the incompatibility with BUGS introduced in version 0.21 is + gone. +* Fixed a bug in forward sampling of truncated discrete distributions + and truncated binomial distributions, in which the lower limit + was never sampled. Thanks to Greg Ridgeway <gregr@rand.org> + +0.22 +* Fixed the ConjugateMNormal sampler so that it now handles more cases. + +0.21 +* max() and min() functions now take a single vector argument, like mean() +* Seed setting fixed in the JAGS terminal. Previously the seed command + did nothing. Thanks to Bettina Gruen <gruen@ci.tuwien.ac.at> +* JAGS can now be built in a separate directory from the source directory. + In particular, "make distcheck" now works. +* Fixed error introduced in 0.20 when calculating upper bounds. +* Responsibility for updating noninformative nodes has + shifted from the Sampler to the Model. This means that these nodes are + updated only once per iteration, with consequent gains in efficiency. +* The ForwardSampler class is no longer necessary. +* Graph::getSortedNodes has more built-in checks, and will throw an + exception if they fail. +* There was a serious bug in DistDiscrete::randomSample leading to + incorrect samples being drawn. This has been fixed. +* Conjugate samplers now work correctly with truncated variables. +* The dump format has changed. It now uses the same R dump format as + initial value and data files. +* MATHLIB_STANDALONE is now defined in the header file config.h +* ARMSampler now sticks at the current value if the loglikelihood is + infinite. This occurs in the LITTERS example. +* Model::initialize no longer enters an infinite loop if an uninitialized + constant node is used in the model. +* The inverse link functions ILogit and Phi could return a value + of exactly 1 due to rounding error, which would lead to some nodes being + apparently inconsistent with the data. These functions now return 1 - + DBL_EPSILON instead. Similarly they return DBL_EPSILON instead of 0. + +0.20 +* Changes required to build JAGS with gcc 2.95-4 and 3.0.4 + Thanks to Chris Jackson <chris.jackson@imperial.ac.uk>. +* Installation of the shared library has been disabled by + default. You can re-enable it with ./configure --enable-shared. +* Rearranged headers to minimize dependencies in the JAGS library. +* DMulti is no longer (and should never have been) a subclass of DistScalar. +* Try to speed up calculation of binomial likelihood when size parameter + is constant. +* Corrected random samplers for Dirichlet and Discrete distributions. +* ForwardSampler now updates all deterministic children of sampled node. +* Fixed constructor for Model (_cansample is now initialized to false). + +0.19 +* Bugfix release. Scalar nodes were causing a compiler error. + +0.18 +* Separate installation of terminal and library. + +0.17 +* Corrected CODA output with thinning interval != 1 +* Added Bernoulli distribution to DistTab (It had been forgotten) +* Allow negative numbers as parameters to distributions and the + truncation construct T(,). +* Added separate initialize command to scripting language (this is + required to handle multiple chains, which we can't do yet, but + it is better to put this in place now) +* Fixed bug in CODA output which claimed that whole nodes were + not being monitored + +0.16 +* Allow C-style block comments in script files +* Use config.h +* Use T(,) syntax for truncation to avoid confusion with I(,) + in WinBUGS. + +0.15 +* Changes to the console, now renamed the terminal. Now uses a Stata + style scripting language. +* Distribution class names and file names have been changed to + correspond with the names in the BUGS language +* DistTab is a proper class. You can now add new distributions to + the DistTab. +* FuncTab is a proper class, like DistTab +* More extensive use of Standard Template Library +* Lots of documentation +* Lots of cruft removal + +0.14 +* SubSetNodes with variable indices have been removed completely + (were deprecated in release 0.12) +* NodeArray has been taken out of the graph directory and put in + the compiler directory + +0.13 +No major changes in functionality. Some architecture changes instead +* GraphNode is renamed to Node +* Parameter is renamed to SArray (a more sensible name, given that it + is based on arrays in S) +* Node is no longer a subclass of SArray. Instead, Node contains an + SArray as a public data member. +* Major changes in the directory structure. Source for the console is + now in a separate directory from the JAGS library, which is in turn + divided into several subdirectories. Currently, the JAGS library + is a "convenience library" created with libtool, so is not installed. + This will change when the class interfaces are nailed down. + +0.12 + +* ConjugateGamma sampler now works with Weibull children + and Double exponential children. +* GraphNode::hasDescendant fixed (would incorrectly return false + under certain circumstances). +* FiniteSampler fixed (would always sample from the prior). +* Conjugate Normal sampler now works correctly with bounded nodes. +* New distribution "dinterval" (class DistInterval) for handling + interval censored observations. +* Conjugate Normal sampler now works correctly with mixture models. +* Added matrix functions inverse and logdet. +* Added Wishart and Multivariate Normal distributions. +* Added Conjugate samplers for Wishart and Multivariate Normal +* SubSetNodes with variable indices are now deprecated: Mixture + models are now represented with a new class "MixtureNode", + and related class "OffsetNode". + +0.11 + +* Added conjugate samplers for normal, gamma (including exponential and + chi square) and beta distributions. +* Fixed important bug that led to likelihood being evaluated twice (!) +* ATTENTION: The dump format has changed for Trace Monitors. + +0.10 + +* New experimental distribution dmstate for transitions in multi-state + Markov models. +* BLAS and LAPACK libraries now required (for the above, but they + will be needed for multivariate normal and Wishart distributions later) +* Parameter class is no longer a virtual class. Takes some functionality + from GraphNode and avoids a lot of code repetition. However, there + may be a performance hit. +* Parameter checking added for functions and distributions. +* addParent and removeParent are no longer virtual functions (a preliminary + for removing graphical computations to a separate library) + +0.9 + +* Further speed improvements. The parser tries to interpret index + expressions on the right hand side of a relation in order to avoid + creating unnecessary nodes and - in particular - SubSet nodes, which + are computationally very expensive. There is a corresponding increase + in speed for the BONES example. + +0.8 + +* The ArrayNode class is abolished and is replaced with two different + classes: + NodeArray: A container for nodes. Also a factory object that will + create aggregate nodes or subset nodes to represent + fixed/stochastic subsets respectively. + AggNode: Aggregate nodes. Simply copies its values from other + nodes. Several different nodes can be aggregated together + to create an AggNode. + + This leads to an enormous improvement in speed for the LSAT example. +* Runs the KIDNEY example + + +0.7 + +* Updating of deterministic nodes no longer takes place automatically, + but is the responsibility of the sampler. This was done in response + to profiling of the LSAT example. + +0.6 + +* Nested indexing now works + +0.5 + +* Fixed segfault when quitting before defining a model. +* User may now choose the thinning interval for monitors +* Runs the LITTERS example +* funclib remodelled to use the new Parameter base class. + FuncTrees are now obsolete. The compiler creates additional + logical nodes for complex expressions. + NOTE: This change creates an enormous performance hit in the + EPIL example, which has a rather complex linear expression. This + suggests that a special function for bi-linear expressions + may be useful in a future version. +* Added regression test suite based on the classic BUGS examples, vol1. + Since this is based on copyright material, it is not included in + the distribution. + +0.4 + +* Major rewrite of libdist with corresponding changes to Stochastic nodes +* Introduced a new base class Parameter +* Some examples broken: + - epil2.bug crashes with a hard-to-trace bug that is overwriting memory + - blockert.bug crashes with error from arms sampler + Remember this is still alpha software + +0.3 + +* License conditions on ARMS software clarified in file AUTHORS +* Runs the PUMP example +* Bug in logDensity for the Gamma distribution fixed +* Monitoring of whole multivariate nodes now works correctly +* Names of nodes in dumped output from TraceMonitor are now correct + (when monitoring the whole node) +* Runs the SEEDS example (seeds.bug, seedssig.bug seedsuni.bug, seedspar.bug) +* Fixed updating of array nodes by adding the contents as parents +* Runs the SURGICAL example (surgical.bug, surgfix.bug, surgrnk.bug) +* Changed ARMSsampler so that it starts with extremely conservative + bounds around the current value. +* Runs the SALM example (with gamma and pareto prior) +* Runs the DYES example +* Runs the STACKS example (with normal, logistic, double exponential, and + t_4 errors) +* Runs the EPIL example (epil2.bug, epil3.bug) +* Runs the BLOCKER example (blocker.bug, blockert.bug, but NOT blockht.bug) +* Runs the OXFORD example (but with poor agreement for sigma due to + poor mixing of this parameter) +* Runs the LITTERS example + +0.2 + +* Fixed bugs in TraceMonitor + - Last monitored value correctly recorded + - mcpar attributes now correct +* Added initialize method for Model +* Nodes now sampled in forward-sampling order (but is this efficient?) +* Initialize includes check that graph is complete +* Can now monitor (some) multivariate nodes +* Dump format changed. It is no longer compatible with the mcmc + class used in the coda library, so the class attribute is now + "mcarray". This is a provisional name +* Runs the first real example: RATS, including the version + with missing values (data in "ratsmiss.dat"), but + - very slow because there is no conjugate sampler, and + - higher autocorrelation than BUGS. This may be due to the + choice of sampling order. + +0.1 + +First public release (18/12/2002). Runs the "line" example, but does +little else. +