---
layout: post
title:  "GNU Octave 4.2.2 Released"
date:   2018-03-13
categories: news release
---

Octave Version 4.2.2 has been released and is now available for [download][1].
An official [Windows binary installer][2] is also available.

This version is a bug fixing release:

- make leftdiv work for scalar \ int-matrix ([bug #51682](https://savannah.gnu.org/bugs/?51682))

- inputdlg.m: Avoid crash when prompt and defaults sizes differ ([bug #53209](https://savannah.gnu.org/bugs/?53209))

- tie `octave_classdef::numel` method to "numel" user override method ([bug #46571](https://savannah.gnu.org/bugs/?46571))

- Fix performance of Sparse `fsolve` for complex sparse matrices ([bug #53140](https://savannah.gnu.org/bugs/?53140))

- Fix performance of Sparse `fsolve` ([bug #53140](https://savannah.gnu.org/bugs/?53140))

- octave.desktop.in: No repetition of Name in Comment field and start I10n ([bug #53078](https://savannah.gnu.org/bugs/?53078))

- Don't create partially invalid graphic objects ([bug #52904](https://savannah.gnu.org/bugs/?52904))

- Test for incorrect regexprep on ARM platforms ([bug #52810](https://savannah.gnu.org/bugs/?52810))

- Fix incorrect regexprep on ARM platforms ([bug #52810](https://savannah.gnu.org/bugs/?52810))

- Correctly handle reading of characters >127 in `scanf` family ([bug #52681](https://savannah.gnu.org/bugs/?52681))

- Fix addpath for UNC paths on Windows ([bug #51268](https://savannah.gnu.org/bugs/?51268))

- Protect being-deleted objects on figure list from second deletion ([bug #52666](https://savannah.gnu.org/bugs/?52666))

- dlmwrite.m: Close `fid` if filename is only one char long ([bug #52679](https://savannah.gnu.org/bugs/?52679))

- Set gnuplot color data to half output range when autoscaling zero input
    range ([bug #52624](https://savannah.gnu.org/bugs/?52624))

- Add `polarplot()` to the list of unimplemented functions ([bug #52643](https://savannah.gnu.org/bugs/?52643))

- configure.ac: Fix test for Java version ([bug #52617](https://savannah.gnu.org/bugs/?52617))

- For gnuplot toolkit, do not map TrueColor data to colormap size ([bug #52599](https://savannah.gnu.org/bugs/?52599))

- Make wheel scroll behave more consistently in pan mode ([bug #52588](https://savannah.gnu.org/bugs/?52588))

- Make gnuplot color have three components for interpolated edge color ([bug #52595](https://savannah.gnu.org/bugs/?52595))

- Simplify gnuplot toolkit scripts for image/non-image data plots ([bug #52589](https://savannah.gnu.org/bugs/?52589))

- Fix concatenation of empty char matrices with other strings ([bug #52542](https://savannah.gnu.org/bugs/?52542))

- build: Fix compiling `OCTAVE_ARPACK_OK_2` Fortran code ([bug #52425](https://savannah.gnu.org/bugs/?52425))

- trisurf.m, trimesh.m: Fix input validation ([bug #48109](https://savannah.gnu.org/bugs/?48109))

- allow uncommenting in editor when line begins with whitespace ([bug #52406](https://savannah.gnu.org/bugs/?52406))

- do not extend selection when indenting/commenting in editor ([bug #45610](https://savannah.gnu.org/bugs/?45610))

- Remove all delimiters from whitespace list in `textscan` function ([bug #52479](https://savannah.gnu.org/bugs/?52479))

- Calculate 1-norm of matrices to assess whether `NaN` or `Inf` are present ([bug #39000](https://savannah.gnu.org/bugs/?39000))

- prevent extra ampersand under KDE in `cd-or-add-to-path` dialog ([bug #52423](https://savannah.gnu.org/bugs/?52423))

- plotyy.m: Fix error when using `FUN2` argument ([bug #48115](https://savannah.gnu.org/bugs/?48115))

- Check ARPACK library for buggy behavior in configure ([bug #52425](https://savannah.gnu.org/bugs/?52425))

- Fix printing integer type images ([bug #51558](https://savannah.gnu.org/bugs/?51558))

- Fix segfault in `delaunayn` when Qhull memory is not properly cleared ([bug #52410](https://savannah.gnu.org/bugs/?52410))

- Fix segfault with CHOLMOD library and empty matrices ([bug #52365](https://savannah.gnu.org/bugs/?52365))

- tag global and persistent symbols as variables when parsing ([bug #52363](https://savannah.gnu.org/bugs/?52363))

- Properly restore the input stream pointer at end of `textscan` ([bug #52116](https://savannah.gnu.org/bugs/?52116) et al.)

- Fix building with Qt4 for Windows ([bug #52237](https://savannah.gnu.org/bugs/?52237))

- Ensure numeric values are passed for the axes `"clim"` property ([bug #52053](https://savannah.gnu.org/bugs/?52053))

- avoid abort on exit from GUI ([bug #50664](https://savannah.gnu.org/bugs/?50664))

- Correct auto limits on log axes with negative and zero values ([bug #51861](https://savannah.gnu.org/bugs/?51861))

- Fix warning in `quadgk` with zero size interval ([bug #51867](https://savannah.gnu.org/bugs/?51867))

- sparse: correctly handle scalar column index ([bug #51880](https://savannah.gnu.org/bugs/?51880))

- Fix segfault in `ichol` under certain conditions ([bug #51736](https://savannah.gnu.org/bugs/?51736))

- configure: ensure empty pkg-config results are actually empty ([bug #51680](https://savannah.gnu.org/bugs/?51680))

- Fix 'legend hide' for gnuplot ([bug #50483](https://savannah.gnu.org/bugs/?50483))

- qqplot.m: Fix typo in input validation ([bug #51458](https://savannah.gnu.org/bugs/?51458))

- Add possible `'\r'` to smartindent regex exprepression ([bug #51279](https://savannah.gnu.org/bugs/?51279))

- make `strncmp` case sensitive again ([bug #51384](https://savannah.gnu.org/bugs/?51384))

- Fix possible infinite loop in normest1.m ([bug #51241](https://savannah.gnu.org/bugs/?51241))

- also run unwind protect cleanup code on interrupt exceptions ([bug #51209](https://savannah.gnu.org/bugs/?51209))

- Fix crash when inverting complex matrices with `NaNs` ([bug #51198](https://savannah.gnu.org/bugs/?51198))

- Improve accuracy of residue for inputs with very different magnitudes ([bug #51148](https://savannah.gnu.org/bugs/?51148))

- publish.m: Fix corruption of results for some code inputs ([bug #51178](https://savannah.gnu.org/bugs/?51178))

- residue.m: Remove code that filters out small return values ([bug #34266](https://savannah.gnu.org/bugs/?34266), [bug #49291](https://savannah.gnu.org/bugs/?34266))

- avoid possible double free at interpreter exit ([bug #51088](https://savannah.gnu.org/bugs/?51088))

- show stack trace for errors in command line and startup files ([bug #49346](https://savannah.gnu.org/bugs/?49346))

- interp1.m: Return `NA` for all columns which are out of bounds ([bug #51030](https://savannah.gnu.org/bugs/?51030))

- use `idx_type` for dimensions instead of `int` ([bug #50934](https://savannah.gnu.org/bugs/?50934))

- show stack trace for wrong type arg errors ([bug #50894](https://savannah.gnu.org/bugs/?50894))

- Let mouse selection of Qt figures update `"currentfigure"` ([bug #50666](https://savannah.gnu.org/bugs/?50666))

- disable qscintilla editor drag and drop so parent will handle it ([bug #50559](https://savannah.gnu.org/bugs/?50559))

- quadgk.m: Correct error messages which point to `quadv` ([bug #50604](https://savannah.gnu.org/bugs/?50604))

- Set version on `AppUserModelId` ([bug #50428](https://savannah.gnu.org/bugs/?50428))

- version-rcfile: Don't try to execute startup directory, only startup.m ([bug #50593](https://savannah.gnu.org/bugs/?50593))

- dlmread: Return empty matrix when requested range is outside data ([bug #50102](https://savannah.gnu.org/bugs/?50102))

- Fix `eigs` for generalized nonsymmetric and shift-invert problems ([bug #39573](https://savannah.gnu.org/bugs/?39573))

- Fix `eigs` for the generalized eigenvalue problem ([bug #50546](https://savannah.gnu.org/bugs/?50546))

- datetick.m: Fix uneven range bugs ([bug #50493](https://savannah.gnu.org/bugs/?50493))

- datenum.m: Correct calculation for fractional leap years ([bug #50508](https://savannah.gnu.org/bugs/?50508))

- datenum.m: Allow horizontal vectors of dates with fractional months
    ([bug #50508](https://savannah.gnu.org/bugs/?50508))

- datenum.m: Accept legal input of vectors with fractional months ([bug #50508](https://savannah.gnu.org/bugs/?50508))

- fix the anchor position in the info text of the doc browser ([bug #50422](https://savannah.gnu.org/bugs/?50422))

- Fix order of legend labels with `plotyy` axes ([bug #50497](https://savannah.gnu.org/bugs/?50497))

- Correct hggroup plot legends for gnuplot toolkit, add legend demo 17 items
    ([bug #49341](https://savannah.gnu.org/bugs/?49341))

- For gnuplot graphics toolkit, show only one key entry for errorbars
    ([bug #49260](https://savannah.gnu.org/bugs/?49260))

- Fix compilation of jit caused by cset d0562b3159c7 ([bug #50398](https://savannah.gnu.org/bugs/?50398))

- Remove inline keyword on file_stat destructor which breaks MacOS compilation
    ([bug #50234](https://savannah.gnu.org/bugs/?50234))

Documentation bugs fixed:

- playblocking.m: Correct documentation about start and limits inputs ([bug #51217](https://savannah.gnu.org/bugs/?51217))

- Fix eig output argument description ([bug #50524](https://savannah.gnu.org/bugs/?50524))

- Remove backslashes before double quotes in m-file docstrings ([bug #52870](https://savannah.gnu.org/bugs/?52870))

- Tweaks to use single quotes instead of double quotes ([bug #52870](https://savannah.gnu.org/bugs/?52870))

- Correct `fieldname` of returned struct in `ver` ([bug #52845](https://savannah.gnu.org/bugs/?52845))

- Cleanup `@code` example in Appendix on test functions ([bug #52852](https://savannah.gnu.org/bugs/?52852))

- Fixes for signal, image, audio, and OOP chapters ([bug #52844](https://savannah.gnu.org/bugs/?52844))

- Fix issues in geometry, polynomial, and interpolation chapters ([bug #52835](https://savannah.gnu.org/bugs/?52835))

- Fix TeX documentation for `qp` and clarify size of inputs ([bug #52829](https://savannah.gnu.org/bugs/?52829))

- Correct errors in Diagonal matrix chapter of manual ([bug #52814](https://savannah.gnu.org/bugs/?52814))

- Replace `@math{1e^{XXX}}` sequences with raw `1eXXX` ([bug #52827](https://savannah.gnu.org/bugs/?52827))

- Use `'...'` rather than deprecated `'\'` for line continuation ([bug #52828](https://savannah.gnu.org/bugs/?52828))

- Make documentation Sec 26.1 more consistent and Sec 25.4 clearer ([bug #52685](https://savannah.gnu.org/bugs/?52685))

- Documentation fixes for linspace, logspace, lookup ([bug #52785](https://savannah.gnu.org/bugs/?52785))

- atan2d.m: Correct documentation to match `atan` docstring ([bug #52786](https://savannah.gnu.org/bugs/?52786))

- Small tweaks to `fplot` and surfnorm docstrings ([bug #52761](https://savannah.gnu.org/bugs/?52761))

- Rewrite documentation for Advanced Indexing ([bug #52723](https://savannah.gnu.org/bugs/?52723))

- Delete extra `']'` in `scanf` docstring ([bug #52742](https://savannah.gnu.org/bugs/?52742))

- Fix mistaken use of space between function and `'('` in documentation ([bug #52723](https://savannah.gnu.org/bugs/?52723))

- Fix various inconsistencies in manual ([bug #52712](https://savannah.gnu.org/bugs/?52712))

- Fix typo in cset 8354b505ad6b ([bug #52702](https://savannah.gnu.org/bugs/?52702))

- Fix inconsistencies with `char`, `strvcat`, `strread` docstrings ([bug #52702](https://savannah.gnu.org/bugs/?52702).

- Explain Matlab compatibility of `fopen` modes ([bug #52644](https://savannah.gnu.org/bugs/?52644))

- Update documentation for keywords to include `classdef` statements ([bug #52591](https://savannah.gnu.org/bugs/?52591))

- Fix documentation of third input to `lsode()` ([bug #52664](https://savannah.gnu.org/bugs/?52664))

- Clarify quiver/quiver3 documentation when a linestyle is given ([bug #52608](https://savannah.gnu.org/bugs/?52608))

- new section about classdef classes with example ([bug #44590](https://savannah.gnu.org/bugs/?44590))

- Correct surface plot explanation of  meshgridded results of 1 input ([bug #52536](https://savannah.gnu.org/bugs/?52536))

- Fix definition of Delaunay triangulation in docstrings ([bug #52416](https://savannah.gnu.org/bugs/?52416))

- accumarray.m: Add `'@'` to function handles in docstring ([bug #52418](https://savannah.gnu.org/bugs/?52418))

- Update manual to explain `\deg` and `\circ` symbols ([bug #52287](https://savannah.gnu.org/bugs/?52287))

- Correct documentation for `randg` ([bug #52118](https://savannah.gnu.org/bugs/?52118))

- Add documentation about PCRE library regexp stack overflow ([bug #51589](https://savannah.gnu.org/bugs/?51589))

- play.m: Correct documentation about start and limits inputs ([bug #51217](https://savannah.gnu.org/bugs/?51217))

- Redo docstring for `qz` ([bug #50846](https://savannah.gnu.org/bugs/?50846))

- describe optional install dependencies PortAudio and SUNDIALS ([bug #50513](https://savannah.gnu.org/bugs/?50513))

- update `CITATION` date, version, and permalink to manual ([bug #47058](https://savannah.gnu.org/bugs/?47058))

 [1]: {{ "download.html" | absolute_url }}
 [2]: https://ftp.gnu.org/gnu/octave/windows