For the full log of gretl changes since January 2000, see
<@url="http://gretl.sourceforge.net/ChangeLog.html">.

2026-04-30 version 2026b
- new function which() to determine which elements of a
  given matrix satisfy a specified condition
- new function fols() for factorized least squares
- new function tsolvepd() for solving Toeplitz linear
  systems when the Toeplitz matrix is known to be symmetric
  and positive definite
- probability distribution functions: add support for the
  truncated normal distribution
- "join" command: fix possible crash on joining data from
  two binary gdtb data files in succession
- correlation matrix plot: use graph-names as set by the
  "setinfo" command if available
- "add" and "omit" commands with --auto option: attach to
  the augmented or reduced $model bundle a list giving the
  order in which regressors were added ("add_order") or
  omitted ("omit_order")
- "var" command with --lagselect option: show the LR test
  P-value for the null of lag order 0
- "vecm" command: in the vecm_info bundle in the $system
  accessor we now provide new matrices: "long_run"
  (Johansen's C), "cov_long_run" (the covariance of vec(C))
  and "se_long_run" (standard errors of the elements of C),
  along with additional documentation in the User's Guide
- "foreign" command block: support the --send-data option
  when executing a Python script, via Pandas
- "panplot" command: correct suport for the --font option
- matrix "slicing": correct handling of an empty selection
  vector, and sypport use of row and column names when
  indexing into matrices
- script editor: handle "doc strings" in hansl functions
  via "question mark-click"
- geoplot addon: document the cbrange option
- User's Guide: improve documentation of string literals
- GUI: /View/Correlations now shows nonparametric option
- GUI: Augment tooltips for model selection dialog buttons
- GUI: "View code" for function packages: preserve inline
  comments
- GUI: fix broken display of complex matrices
- GUI: enhance searching of gretl-curated data files
- GUI: fix handling of scalar arguments in the dialog box
  for calling function packages
- GUI: "ui-maker" for functions packages: support setting
  a run-time default for a boolean argument
- GUI: fix breakage in Command Log on Windows and macOS
- GUI: fix breakage in string argument selector for
  function packages on 32-bit Windows (GTK2)
- launching of gnuplot via gretl: respect the GNUTERM
  environment variable on Linux, if present
- Windows ARM64 build: include MPI and make available an
  ARM64 build of X-13ARIMA-SEATS (x13as)
- Mac builds: update GTK3 to version 3.24.52
