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RELEASE-NOTES.txt
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STAN C++ RELEASE NOTES
======================================================================
Note: these are the release notes for the stan-dev/stan repository.
Further changes may arise at the interface level (stan-dev/{rstan,
pystan, cmdstan}) and math library level (stan-dev/math).
v2.26.1 (15 February 2021)
======================================================================
- Updated Math to v4.0.1
v.2.26.0 (26 January 2021)
======================================================================
- Improved performance for assigning to slices of matrices and vectors and vector-style indexing (#2962, #2964, #2965, #2973).
- Improved error messages on range checks. (#2978)
- Allowed Stan CSV files to have first column be any Stan variable name, not just "lp__".
- Removed .eval() in rvalue() where applicable. (#2974)
- Allowed reader to accept Eigen vector and use Eigen Map to access inputs. (#2955)
- Allowed functions in reader to output a `var_value<Eigen::Matrix<T, R, C>>`.
- Added assignment to `var_value<Eigen::Matrix<T, R, C>>`.
- Added rvalue overloads for `var_value<Eigen::Matrix<T, R, C>>`.
v.2.25.0 (26 October 2020)
======================================================================
- added a const accessor to _z in base_hmc.hpp
- bugfixed validate_dims in array_var_context
- cleaned up includes of Eigen
v.2.24.0 (28 July 2020)
======================================================================
- `std::chrono` is now used for all timing purposes
- fixed a bug with generated quantities for vectors of length 1
- added `recover_memory` for normal exit of `log_prob_grad`
- replaced the use of `boost::` functions/metaprograms in favor of `std::` where applicable
v.2.23.0 (22 April 2020)
======================================================================
- updated Stan Math to 3.2
- `rvalue` and `assign` now accept generic Eigen expressions
v.2.22.0 (24 January 2020)
======================================================================
New Features
------------
- validate_dims in stan::io::var_context vas made a virtual function which allows its implementation for JSON data which is needed to accepts arrays where any dimension is size 0
- replaced Eigen vectors of strings with std::vector<std::string>
- replaced stan::math::domain_error with throw_domain_error
- added const noexcept accessors to the stepsize adaptation class which allows developers to query the adaptation parameters in contexts where it's natural to have a const sampler (logging, serialization, ...)
v.2.21.0 (18 October 2019)
======================================================================
New Features
------------
- Add Intel TBB (#2769)
- Add automated maintanence and cleanup via clang-tools to makefile (#2805)
- Use Welford's algorithm for Variance Estimates in src/stan/analyze (#2819)
- Adds additional no-u-turn checks across subtrees to avoid missing u-turns for approximately iid normal models (#2800)
- Add gp kernels to language (#2739)
- Update rhat and ess (#2794)
Bug Fixes
---------
- Fix const logic and size check (#2822)
- Add ifdef for R new_model (#2798)
- Add g_ to name of g vector name in ps_point (#2832)
v.2.20.0 (18 July 2019)
======================================================================
New Features
------------
- Update effective sample size calculations, with a small change to the autocovariance function, to use split chains (#2774)
- Add stan::model::model_base base class and and stan::model::model_crtp static adapter class for constructing models. (#2785)
- Allow ts and t0 to be parameters, complete ode_test, and extend the integrate_ode_* stan models (#2791)
- Add the GP covariance functions to the language (primitives of some popular materns, a dot product, and the periodic) (#2758)
- Update Eigen includes to allow compilation with new plugin methods (#2754)
- Add gp kernels to language (#2739)
Bug Fixes
---------
- Multi-unit compilation of base_xhmc.hpp. (#2775)
- Declaring a size zero simplex in a Stan program will halt the program. (#2773)
Other
-----
- Defer to Eigen's copy constructor now for assignment ( faster matrix assign ) (#2784)
- Rethrow_located also takes in a string to specify the location. (#2770)
- Faster indexing (#2766)
- Fixed generator so that matrix indexing uses most efficient access strategy (#2749)
v.2.19.1 (18 Apr 2019)
======================================================================
This is a release out of cycle to address a performance bug in v.2.19 (stan-dev/stan#2748)
Bug Fixes
--------------------------------------------------
* #2749 - Fixed generator so that matrix indexing uses most efficient access strategy - generated code should call stan::math::get_base1() on matrix using 5-arg function which specifies matrix row, column.
v.2.19.0 (20 March 2019)
======================================================================
Stan now comes with GPU support for certain functions; see the Math library
release notes for more details: https://github.com/stan-dev/math/releases/tag/v2.19.0
The manual is now online in HTML format!
New Features
--------------------------------------------------
* #2618 - Add a new Variational Inference diagnostic
* #2627 - 1d integrator
* #2725 - standalone generated quantities
* #2717, #2669 - offset/multiplier transformations for easier non-centering, etc
* #2652 - Allow CSV reader to read max_depth from CmdStan CSV file
* #2620 - expose beta_proportion distribution, cdf, rng functions
* #2635 - allow paths to be passed to stanc
* #2441 - Add specialized functions for GLMs
* #2358 - enchanced include syntax
* #2575 - Analysis API for computing effective sample size
* #2467 - expose bernoulli logit rng
Bug Fixes
--------------------------------------------------
* #2730 - make read_stan_csv more robust; affects CmdStan.
* #2714 - fix bug in generated code for strange constraint expressions
* #2704 - fix json nan and inf handling
* #2677 - fix copying for compound assignments
* #2672 - fix sampling from multivariate normal specified by precision matrix
* #2643 - fix segfault in optimizing an exponential model
* #2636 - fix return of generated quantities when client only asked for params
* #2614 - fix "unknown variable" messages for function calls on LHS
* #2609 - use the word "info" instead of "warning" for many messages
v.2.18.1 (24 December 2018)
======================================================================
Bugfix release - major bug in threading where certain thread count and
job size combinations could result in incorrect output. See
https://discourse.mc-stan.org/t/bug-in-map-rect-with-threading-in-stan-2-18-0/7056
for more details.
Bug Fixes
--------------------------------------------------
* Fix threading batch size bug (stan-dev/math#1075)
v2.18.0 (13 July 2018)
======================================================================
This is our first release with parallelism (threading and MPI)!
New Features
--------------------------------------------------
* New functions from Math library:
- map_rect
- multi_normal_rng
- multi_normal_cholesky_rng
- multi_student_t_rng
- many vectorized RNGs
- multi_normal_rng
- multi_normal_cholesky_rng
- multi_student_t_rng
- bernoulli_rng
- beta_binomial_rng
- binomial_rng
- neg_binomial_2_rng
- neg_binomial_2_log_rng
- neg_binomial_rng
- poisson_rng
- poisson_log_rng
- uniform_rng
- von_mises_rng
- qr_thin_Q
- qr_thin_R
- matrix_exp_multiply
- scale_matrix_exp_multiply
- integrate_ode_adams
- log_mix
- std_normal
- ordered_logistic_log
- ordered_probit_log
* Manual now available in HTML (#2558)
* other vectorized RNGs (#2467)
* Easier-to-use algebra_solver
* Changes to effective sample size calculation (#2451)
* Foreach loops (#2438)
* Standalone generated quantities (#2434)
* Allow users to qualify function parameters as data (#2430)
Bug Fixes
--------------------------------------------------
* Better error messages (#2508, #2554)
* Fixes the behavior in mcmc_writer so that when there's an exception thrown in the model's generated quantities block, it writes out the parameter values and NaN for any generated quantity (#2571)
* Allow initialization of a Stan program to continue when there's a violation of constraints in transformed parameters (#2570)
* Fixed `+=` #(2482)
* rising_factorial and falling_factorial type checking (#2413)
* have parser check return type of integrate_ode_bdf functional (#2411)
* increase precision in output of ELBO values (#2406)
* ternary op fixes (#2101)
v2.17.1 (11 December 2017)
======================================================================
This is a bugfix release fixing a performance regression in the math repo. See
https://github.com/stan-dev/math/issues/667 for more details.
v2.17.0 (05 September 2017)
======================================================================
Bug Fixes
--------------------------------------------------
* Call the correct unconstrain function for covariance matrices from writer
method (#2386)
* Better error messages (#2280, #2359)
* Deal better with 0-length simplexes (#2365)
* undefined behavior with uninitialized bool (#2344)
New User-Facing Features
--------------------------------------------------
* append_array function (#481)
* "data" type prefix qualifier for function arguments (#2369, #2376)
* new algebraic solver (#2380, #2300, #2339)
* standalone functions (#2310)
New Internal Features
--------------------------------------------------
* C++11 support (#2364)
* Boost 1.64.0
* Inline many functions to allow use in multiple translation units (#2082)
Documentation
--------------------------------------------------
* Updates to the Gaussian Processes chapter in the manual (#2372)
v2.16.0 (15 June 2017)
======================================================================
Bug Fixes
--------------------------------------------------
* Fix typo in cumulative_sum definition (#2288)
* Check input/output streams and give better errors when files are not found (#2227)
* Flush print outputs even in the face of a reject (#2311)
New User-Facing Features
--------------------------------------------------
* New categorical_logit_rng function (#517)
* New include mechanism for including stan code from other files (#2224)
* New mechanism for compiling standalone Stan functions (#2267)
New Internal Features
--------------------------------------------------
* New logging framework (#512)
* Resolve hessian() to call O(N) reverse-mode version (#2321)
* Change model to take in int seed for RNG instead of full RNG object (#2241)
Documentation
--------------------------------------------------
* Updates to the Gaussian Processes chapter in the manual (#2240)
* User manual updates for this release (#2265)
v2.15.0 (14 April 2017)
======================================================================
New Team Members
--------------------------------------------------
* Sean Talts (Columbia University) -- Stan and Math libraries
* Imad Ali (Columbia University) -- Bayesian Statistician
Bug Fixes
--------------------------------------------------
* Added runtime checks for container variable dimensions (#1194)
* Fixed compiler errors for certain variants of nuts_classic (#2268)
* Fixed compound declaration definition in local blocks (#2145)
New User-Facing Features
--------------------------------------------------
* Row-vector and matrix expressions (#1489)
* Better warning message for windowed adaptation (#2064)
* Stan language - model block is optional in a Stan program (#1427)
New Internal Features
--------------------------------------------------
* Code cleanup for parser grammars (#2223)
* Exposed new function signatures for to_matrix (#1452)
* Remove initial state from the calculation of the average Metropolis acceptance probability (#2182)
* Refactor stan/lang/generator.hpp (#2204)
* Add informational message to `std::domain_error` exception (#2203)
* Tweaked windowed adaptation warning to be more readable (#2064)
Documentation
--------------------------------------------------
* User manual updates for this release (#2122)
v2.14.0 (26 December 2016)
======================================================================
Bug Fixes
--------------------------------------------------
* NUTS sampler broken (#2179)
* seralization issues with RStan v2.13.1 (#2179)
* printing result of a void function parses, but doesnt' compile (#2168)
* compound declare/define not working for all types (#2163)
Other
--------------------------------------------------
* Update Stan Math Library to v2.14.0
* make use of const references consistent (#2186)
v2.13.1 (3 December 2016)
======================================================================
Bug Fixes
--------------------------------------------------
* fixed compound declare and define (#2156, #2153, #2146)
v2.13.0 (25 November 2016)
======================================================================
New Team Members
--------------------------------------------------
* Thel Seraphim (Columbia University) -- Stan and Math libraries
* Vincent Picaud (CEA, France) -- MathematicaStan
Bug Fixes
--------------------------------------------------
* generated code for lower truncation fixed for discrete variables (#2054)
* typo in error messages for RNGs only allowed in transformed data
block (#2124)
* variables ending in _lpdf are now allowed (#2123)
* cov_exp_quad() not compiling in C++ (#2113)
* conditional operator in functions not compiling in C++ (#2101)
* off-by-one error in error message for integrate_ode_bdf() fixed (#2073)
New User-Facing Features
--------------------------------------------------
* vectorization of unary functions (#2119, #2037)
* bernoulli_logit_rng() added to language (#2084)
* Jacobian warning now suggests `target +=` (#2066)
* matrix_exp() function now available (#2043)
* compound declaration / definition statements (#1951)
New Internal Features
--------------------------------------------------
* user-defined functions can be declared and not defined (#2068)
Documentation
--------------------------------------------------
* manaul reorganization (#1599)
* line too long (#2121)
* added integer % operator documentation (#2065)
* lots more (#2051)
v2.12.0 (6 September 2016)
======================================================================
New Team Members
--------------------------------------------------
* Charles Margossian (Metrum Research Group, LLC) -- diff eq models
Known, outstanding bugs
--------------------------------------------------
* Normalization for lower truncated discrete distributions is off
by one (#2054)
Bug Fixes
--------------------------------------------------
* updated the math library to deal with g++6 errors
(math#348, math#345, math#327)
* fixed issue with 1:0 indexing in array slicing producing
huge size (#1960)
* allow variables to be named the same as unary functions
(#1459)
* distributions without cumulative distribution functions are now
prevented from being used in truncation (#2052)
* allow user-defined lpdf functions to be used in `target += `
expressions (#1944)
* fixed duplicate function warning message (#1946)
* fixed ternary operator generating C++ code that doesn't compile
(#2044)
New User-Facing Features
--------------------------------------------------
* added mdivide_left_spd() and mdivide_right_spd() to the language
(#2016)
* added cov_exp_quad() to the language (#1957)
* added break and continue statements to the language (#1756)
* added append_row() and append_col() to the language (#1347)
* updated error message for missing `|` when using probability functions
(#2003)
* updated parser/warning errors for new syntax (#1940)
New Internal Features
--------------------------------------------------
* updated Travis CI config (#2033)
* fixed segfault in lang test with g++-5.4 (#2030)
* `make clean-all` cleans CVODES binaries (#2012)
v2.11.0 (27 July 2016)
======================================================================
Bug Fixes
--------------------------------------------------
* fixed sampling bug introduced in v2.10.0 (#1979)
* fixed compilation issue under clang++3.8 for rethrow_located and
ios_base::failure (#1937)
* print() now prints when there is a rejection/exception in the model
block (#1936)
* integer division by zero throws exception (#1974, math#321)
v2.10.0 (15 June 2016)
======================================================================
New Team Members
--------------------------------------------------
* Aki Vehtari (Aalto Uni) --- GPs, LOO, statistical modeling,
MATLAB
* Rayleigh Lei (U. Michigan) --- vectorizing functions
* Sebastian Weber (Novartis) --- diff eq models
New User-Facing Features
--------------------------------------------------
* introduction of = for assignment; deprecating <- (#1819)
* _lpdf, _lpmf, _lcdf, _lccdf and vertical bar notation
for probability mass, density, and cumulative distribution
functions; update user-defined function syntax;
deprecate older forms (#1811)
* target += lp to replace increment_log_prob(lp); target() to rpelace
log_prob() function; remove lp__ variable access (#1800)
* conditional (ternary) operator (#1125)
* stiff diff eq solver CVODES from Sundials
* add control parameters (tolerance, max iteraitons) to ODE solvers
* rename ODE solvers based on algorithm, integrate_ode_rk45
for existing non-stiff Runge-Kutta solver and integrate_ode_bdf
for the stiff backward differentiation form; deprecate
the unmarked integrate_ode function (#1886)
* limiting diff eq iterations in solvers (Boost/CVODES)
* unit_vector as parameter (#1713) [it never worked in the past]
* rename multiply_log and log_binomial_coefficient
to lmultiply and lchoose (also part of #1811)
* incomplete beta function as inc_beta (#1540)
New Internal Features
--------------------------------------------------
* exhaustive HMC (XHMC)
* multinomial variant of NUTS (#1846)
* simplified NUTS criterion (#1852)
* uniform static HMC (#1849)
* Riemannian HMC with SoftAbs (#304)
* refactor semantic actions to header/implementation (#1795)
* writer callback interface for algorithms (#1739)
* error writer callbacks (#1836)
* cleaner HMC diagnostic ouptut (#1790)
* pull-request template on GitHub (#1794)
* remove unused filename argument in parser (#1752)
* remove unused lp_no_jacobian function (now controlled with
template params)
* writer callback interface for HMC (#1680)
Bug Fixes
--------------------------------------------------
* index slicing not compiling for matrices (#1754, #1810)
* parsing too eager for reserved words (#1077)
* CSV reader whitespace sensitivity (#1907)
* delayed reject multinomial NUTS (#1906)
* PYTHON2 variable for cpplint (#1912)
* size zero vectors, row vectors, matrices (#1909)
* overflowing transition probs in multinomial NUTS (#1904)
* all the manual bug fixes (#1431, #1709, #1734, #1753,
#1826, #1874, #1879, #1890)
* compiler fix for vector /. real to compile (#1883)
* terminate infinite loops in optimization (#1896)
* ADVI argument config failure (#1731)
* double struct creation removed for forward-declaration
of user-defined functions bug (#1079)
* clarify deprecation of <- is only in Stan, not R (#1819)
* memory leaking with command getting in way of debug (#1293)
* makefile dependencies for stanc (#1682)
* remove NaN init for integers in place of min (negative)
value (#1766)
* namespace pollution from log_mix removed (#1707)
* message buffering reduced in ADVI
* add pstream to user-defined CDFs supporting truncation (#1628)
* initialization failure message clarification (#1736)
v2.9.0 (3 Dec 2015)
======================================================================
New Team Members
--------------------------------------------------
* Krzysztof Sakrejda, adding functions in Stan Math and Stan
New Features
--------------------------------------------------
* General R-like indexing for arrays and vectors! (#1057)
* Automatic differentation paper: http://arxiv.org/abs/1509.07164
* Changed unit_vector transformation (#1720)
* Automatically detect bitness for Windows 32-bit (#1614)
* Better adaptation for ADVI (#1550, #1559, #1587, #1591, #1593, #1710)
Bug Fixes
--------------------------------------------------
* Allows unit_vector to be used in parameters block (#1720)
* Fixed NaN bug in ADVI (#1610)
Maintenance
--------------------------------------------------
* Reduced Cpplint warnings to 0! (#1651, #1656, #1701)
* Better ADVI output (#1588)
* Updated logo for doxygen (#1631)
* Refactoring the use of output streams (#1602, 1653, #1662,
#1670, #1676, #1696, #1601)
* Moved src/stan/services files and namespaces (#1616)
* Updated clang++ compiler options for Mac OS X (#1668)
* Additional testing on Travis CI (#1708)
* Removed unused python script (#1611)
* Updated makefile (#1618, #1655, #1659)
Manual
--------------------------------------------------
* Improved Wiener distribution documentation (#1576)
* Corrected bugs and typos (#1617)
* Thanks to Julain King, Ashley Ford, Evelyn Mitchell,
José Rojas Echenique, Miguel de Val-Borro, Bruno Jacobs,
Ryan Batt, David Manheim
v2.8.0 (8 Sep 2015)
======================================================================
New Team Members
--------------------------------------------------
* Dustin Tran, helps make variational inference a reality
New Features
--------------------------------------------------
* Inverse CDF for normal distribution (#1157)
* Compiler error messages are friendlier
- operator[] (#1517)
- assignment (#1543, stan-dev/math#146)
* Sparse matrix by dense vector multiplication (#1565)
Bug Fixes
--------------------------------------------------
* Disallow user-defiend function overloading (#1547)
* Better behaved beta cdf (#1561, stan-dev/math#124)
Manual
--------------------------------------------------
* Corrected all known bug reports and typos; details in
issues #1526, #1548, #1577
* Thanks to @jonathan-g (Github handle), Damjan Vukcevic,
Daniel Chen, Guido Biele, Takahiro Kubo, Andy Choi
v2.7.0 (9 July 2015)
======================================================================
New Team Members
--------------------------------------------------
* Alp Kucukelbir, who brings you variational inference
* Robert L. Grant, who brings you the StataStan interface
Major New Feature
--------------------------------------------------
* Black-box variational inference, mean field and full
rank (#1505)
New Features
--------------------------------------------------
* Line numbers reported for runtime errors (#1195)
* Wiener first passage time density (#765) (thanks to
Michael Schvartsman)
* Partial initialization (#1069)
* NegBinomial2 RNG (#1471) and PoissonLog RNG (#1458) and extended
range for Dirichlet RNG (#1474) and fixed Poisson RNG for older
Mac compilers (#1472)
* Error messages now use operator notation (#1401)
* More specific error messages for illegal assignments (#1100)
* More specific error messages for illegal sampling statement
signatures (#1425)
* Extended range on ibeta derivatives with wide impact on CDFs (#1426)
* Display initialization error messages (#1403)
* Works with Intel compilers and GCC 4.4 (#1506, #1514, #1519)
Bug Fixes
--------------------------------------------------
* Allow functions ending in _lp to call functions ending in _lp (#1500)
* Update warnings to catch uses of illegal sampling functions like
CDFs and updated declared signatures (#1152)
* Disallow constraints on local variables (#1295)
* Allow min() and max() in variable declaration bounds and remove
unnecessary use of math.h and top-level :: namespace (#1436)
* Updated exponential lower bound check (#1179)
* Extended sum to work with zero size arrays (#1443)
* Positive definiteness checks fixed (were > 1e-8, now > 0) (#1386)
Code Reorganization and Back End Upgrades
--------------------------------------------------
* New static constants (#469, #765)
* Added major/minor/patch versions as properties (#1383)
* Pulled all math-like functionality into stan::math namespace
* Pulled the Stan Math Library out into its own repository (#1520)
* Included in Stan C++ repository as submodule
* Removed final usage of std::cout and std::cerr (#699) and
updated tests for null streams (#1239)
* Removed over 1000 CppLint warnings
* Remove model write CSV methods (#445)
* Reduced generality of operators in fvar (#1198)
* Removed folder-level includes due to order issues (part of Math
reorg) and include math.hpp include (#1438)
* Updated to Boost 1.58 (#1457)
* Travis continuous integration for Linux (#607)
* Add grad() method to math::var for autodiff to encapsulate math::vari
* Added finite diff functionals for testing (#1271)
* More configurable distribution unit tests (#1268)
* Clean up directory-level includes (#1511)
* Removed all lint from new math lib and add cpplint to build lib
(#1412)
* Split out derivative functionals (#1389)
Manual and Dcoumentation
--------------------------------------------------
* New Logo in Manual; remove old logos (#1023)
* Corrected all known bug reports and typos; details in
issues #1420, #1508, #1496
* Thanks to Sunil Nandihalli, Andy Choi, Sebastian Weber,
Heraa Hu, @jonathan-g (GitHub handle), M. B. Joseph, Damjan
Vukcevic, @tosh1ki (GitHub handle), Juan S. Casallas
* Fix some parsing issues for index (#1498)
* Added chapter on variational inference
* Added strangely unrelated regressions and multivariate probit
examples
* Discussion from Ben Goodrich about reject() and sampling
* Start to reorganize code with fast examples first, then
explanations
* Added CONTRIBUTING.md file (#1408)
v2.6.3 (17 March 2015)
======================================================================
Bug Fixes
----------------------------------------
* removed extra semicolons in code; they are techinically a C++11
extension [#1379]
* removed use of variable length array; this is a C99 feature
[#1381]
Features
----------------------------------------
* error messages in initialization during sampling get printed out
to the message stream [#1326]
Test Enhancements
----------------------------------------
* added tests for is_vector_like [#1360]
v2.6.2 (14 March 2015)
======================================================================
Bug Fixes
----------------------------------------
* fixed append_row and append_col to return the corect types [#1297]
* documentation fix: fixed generation of stan-functions.txt [#1327]
* changed constructor of stan::agrad::var so it can compile without
C++11 [#1337, 1364]
* fixed bug in matrix double-indexing [#1342]
* fixed calculation of derivative in normal_cdf_log, normal_ccdf_log
[#1357]
API Enhancements
----------------------------------------
* refactored math / autodiff library [#1222, #1349, #1353]
* fixed capitalization in tests [#1355]
* updated Eigen to 3.2.4 [#1173]
v2.6.1 (3 March 2015)
======================================================================
Language Enhancements
----------------------------------------
* improved warning messages from the parser [#1244]
API/Build/Test Enhancements
----------------------------------------
* the C++ API now throws 3 types of exceptions [#685]
* parts of the C++ API were rearranged (gm, common) [#942]
* replace promote_args
* allow reading from a local makefile outside of the code repository [#1277]
* added gradient of hessian functional in C++ [#1272]
* supressed printing of adjoints when printing stan::agrad::var [#330]
* removed some cpplint warnings [#1282]
* removed doxygen warnings [#1290]
* reimplemented fmix and fmax [#1311]
Bug Fixes
----------------------------------------
* allow nested indexes to compile with integrate_ode [#1317]
Documentation
----------------------------------------
* fixed typos in MCMC sampling
v2.6.0 (5 February 2015)
======================================================================
New Features
----------------------------------------
* log_mix function for binary mixtures [half of #970]
* neg_binomial_2 CDF function [#1129]
Language Enhancements
----------------------------------------
* allow local-variable integers to be treated as constants,
allowing, among other things, more general ODE functions [#1131]
* initialize transformed data and generated quantities the
same way as transformed parameters [#1099]
* libstan.a removed and model compilation is 100% header-only [#1095]
* check for infinite/nan inits from boundary initializations
with warning [#537]
API/Build/Test Enhancements
----------------------------------------
* removed extra variables being generated by validation [#1248]
* generalize OperandsAndPartials to second order [#676]
* rationalize error handling, using const char* args for efficiency [#1234]
* upgrade to Boost version 1.55 library [#1206]
* generate .hpp instead of .cpp for models [#803]
* value_of_rec recursive metaprogram to pull values out of higher-order
autodiff structures; removes order dependency on fwd/rev includes
[#1232]
* tests now run more efficiently with Python script [#1110]
* add performance tests to continuous integration to perform
end-to-end regression testing on speed [#708, #1245]
* manual index parser for tool automation in interfaces (such as
auto-complete suggestions) and emacs mode
* refactor log determinant and fix return type cast in vector arena
alloc [#1187]
* update makefile dependencies for auto-generated cpp test files [#1108]
* move test models into clearly labeled directories (good/bad) [#1016]
* removing policies from math error checking [#1122]
* remove usage of Boost's formatting (which can cause runtime
errors like printf) [#1103]
* rearrange directory structure of err_handling [#1102]
* clean up math includes to proper location in source tree [#778]
* remove Windows newline and write script to catch in future [#1233]
* remove extra copy of Eigen (3.2.0), leaving just Eigen 3.2.2 [#1206]
* remove example-models dependency from Git [#1105]
Bug Fixes
----------------------------------------
* allow identifiers with prefixes matching keywords [#1177]
* allow functions to be used in variable declaration constriants [#1151]
* fix segfault resulting from multivariate normal in optimizer (root
cause wasn't in optimizer, but in autodiff nesting cleanup) [#1200]
* fixed return type in language and C++ for append_row of two
column vectors and append_col of two row vectors [#1241]
* fixed derivative error for pareto_type_2_log() [#1223]
* remove unused models from stan distribution (they're now in
the stan-dev/example-models repo on GitHub) [#1249]
* squash compiler warnings and fix windows tests (mostly
signed vs. unsigned, as usual) [#1257]
* fix memory leak in ODE solver [#1160]
* fix overflow in gamma_p function to throw instead [#674]
* make sure multiply_lower_tri_self_transpose returns a symmetric
matrix [#1121]
* fix overflow in Poisson RNG to throw instead [#1053]
Documentation
----------------------------------------
* manual updated for 2.6 [#1081]
- new chapter on software process (thanks to Sebastian Weber
and Tony Rossini for help)
- new chapter on sparse and ragged arrays
- pointers to Julia and MATLAB interfaces (yay!)
- vectorization of CDFs described
- fix priors on IRT models
- added discussion of multiple change points
- remove range-contstrained scale priors
- clarified fixed parameter call
- remove references to "std::vector" in favor of "array"
- corrected signs for lasso and ridge and discuss truncated gradient
and absolute zero results
- extended discussion of Gaussian process priors (thanks
to Aki Vehtari, Jon Zelner, and Herra Huu)
- remove bogus paths to models and replace with pointers to
example-models repo
- clarified Wishart/inverse Wishart parameterizations w.r.t. BDA3
- fixed exp_mod_normal definition
- fix student-t reparameterization
- fix hurdle distribution definition
Thanks!
----------------------------------------
Thanks to all the users who contributed code and doc corrections
and comments: Alex Zvoleff, Juan Sebastián Casallas, Gökçen
Eraslan, seldomworks [GitHub handle], Avraham Adler, Sebastian
Weber, Amos Waterland, David Hallvig, Howard Zail, Andre Pfeuffer,
Bobby Jacob, Cody Ross, Krzysztof Sakrejda, Andrew Ellis, John Sutton
v2.5.0 (20 October 2014)
======================================================================
New Features
----------------------------------------
* ordinary differential equation solver, implemented by coupling
the user-specified system with its sensitivities (#771)
* add reject() statement for user-defined rejections/exceptions (#458)
* new num_elements() functions that applies to all containers (#1026)
* added is_nan() and is_inf() function (#592)
* nested reverse-mode autodiff, primarily for ode solver (#1031)
* added get_lp() function to remove any need for bar lp__ (#470)
* new functions append_col() and append_row() like cbind and rbind
in R (#787)
* added modulus function in a way tht is consistent with integer
division across platforms (#577)
* exposed pareto_type_2_rng (#580)
* added Frechet distribution and multi_gp_cholesky distribution
(thanks to Alexey Stukalov for both)
Enhancements
----------------------------------------
* removed Eigen code insertion for numeric traits and replaced
with order-independent metaprogram (#1065)
* cleaned up error messages to provide clearer error context
and more informative messages (#640)
* extensive tests for higher order autodiff in densities (#823)
* added context factory
* deprecated lkj_cov density (#865)
* trying again with informational/rejection message (#223)
* more code moved from interfaces into Stan common libraries,
including a var_context factory for configuration
* moved example models to own repo (stan-dev/example-models) and
included as submodule for stan-dev/stan (#314)
* added per-iteration interrupt handler to BFGS optimizer (#768)
* worked around unused function warnings from gcc (#796)
* fixed error messages in vector to array conversion (#579, thanks
Kevin S. Van Horn)
* fixed gp-fit.stan example to be as efficient as manual
version (#782)
* update to Eigen version 3.2.2 (#1087)
Builds
----------------------------------------
* pull out testing into Python script for developers to simplify
makes
* libstan dependencies handled properly and regenerate
dependencies, including working around bug in GNU
make 3.8.1 (#1058, #1061, #1062)
Bug Fixes
----------------------------------------
* deal with covariant return structure in functions (allows
data-only variables to alternate with parameter version); involved
adding new traits metaprograms promote_scalar and
promote_scalar_type (#849)
* fixed error message on check_nonzero_size (#1066)
* fix arg config printing after random seed generation (#1049)
* logical conjunction and disjunction operators short circuit (#593)
* clean up parser bug preventing variables starting with reserved
names (#866)
* fma() function calls underlying platform fma (#667)
* remove upper bound on number of function arguments (#867)
* cleaned up code to remove compiler warnings (#1034)
* share likely() and unlikely() macros to avoid redundancy warnings (#1002)
* complete review of function library for NaN behavior and consistency
of calls for double and autodiff values, with extensive
documentation and extensive new unit tests for this and other,
ehances NaN testing in built-in test functions (several dozen issues
in the #800 to #902 range)
* fixing Eigen assert bugs with NO_DEBUG in tests (#904)
* fix to makefile to allow builds in g++ 4.4 (thanks to Ewan Dunbar)
* fix precedence of exponentiation in language (#835)
* allow size zero inputs in data and initialization (#683)
Documentation
----------------------------------------
* new chapter on differential equation solver
* new sections on default priors for regression coefficients and
scales, including hierarchical and multivariate based on
full Cholesky parameterization
* new part on algorithms, which chapters on HMC/NUTS, optimization,
and diagnostics
* new chapter on models with latent discrete parameters
* using latexmk through make for LaTeX compilation
* changed page numbers to beg contiguous throughout so page numbers
match PDF viewer page number
* all user-supplied corrections applied from next-manual issue
* section on identifiability with priors, including discussion of K-1
parameterization of softmax and IRT
* new section on convergence monitoring
* extensive corrections from Andrew Gelman on regression models
and notation
* added discussion of hurdle model in zero inflation section
* update built-in function doc to clarify several behaviors (#1025)
v2.4.0 (20 July 2014)
======================================================================
New Features
------------
* L-BFGS optimization (now the default)
* completed higher-order autodiff (added all probability functions,
matrix functions, and matrix operators); tested up to 3rd order
* enhanced effective range of normal_cdf to prevent underflow/overflow
* added von Mises RNG
* added ability to use scalars in all element-wise operations
* allow matrix division for mixing scalars and matrices
* vectorization of outcome variates in multivariate normal with efficiency boosts
* generalization of multivariate normal to allow rwo vectors as means
and
Reorganization
--------------
* move bin/print and bin/stanc to CmdStan; no longer generating main
when compiling model from Stan C++
New Developer
-------------
* Added Jeffrey Arnold as core Stan developer
Bug Fixes
---------
* modified error messages so that they're all 1-indexed instead of 0-indexed
* fixed double print out of times in commands
* const added to iterators to allow VS2008 compiles
* fix boundary conditions on ordered tests
* fix for pow as ^ syntax to catch illegal use of vectors (which
aren't supported)
* allow zero-length inputs to multi_normal and multi_student_t
with appropriate log prob (i.e., 0)
* fixed bug in inverse-Wishart RNG to match MCMCPack results
with slightly asymmetric inputs
* fixed problem with compiling user-defined function twice
* fixed problem with int-only parameters for user-defined functions
* fixed NaN init problems for user-defined functions
* added check that user variable doesn't conflict with user function + doc
* disallow void argument types in user-defined functions
Code Cleanup and Efficiency Improvements
----------------------------------------
* removed main() from models generated from C++ Stan (they are
now available only in CmdStan); removed no_main command options
* reserve vector sizes for saving for sample recorder
* removing many instances of std::cout from API (more still to go)
* removed non-functional Nesterov optimization option
* optimization code refactoring for testing ease
* better constant handling in von Mises distribution
* removed tabs from all source files
* massive re-org of testing to remove redundant files and allow
traits-based specializations, plus fixed for 1-indexing
Testing
-------
* added tests for log_softmax, multiply_lower_tri_self_transpose, tcrossprod
* break out function signature tests into individual files, add many
more
* enhanced cholesky factor tests for round trip transforms and
derivatives
* extensive unit testing added for optimization
* remove use of std::cout in all tests
Example Models
--------------
* lots of cleanup in links and models in ARM examples
* added BUGS litter example with more stable priors than in the
BUGS version (the original model doesn't fit well in BUGS as is,
either)
Documentation
-------------
* add infix operators to manual
* categorical_logit sampling statement
* Cholesky factor with unit diagonal transform example
* example of using linear regression for prediction/forecasting with
notes
* clarified some relations of naive Bayes to clustering
vs. classification and relation to non-identifiability
* new advice on multivariate priors for quad_form_diag