Summary of important uservisible changes
April 06, 2022
News for version7 6 5 4.4 4.2 4 3.8 3.6 3.4 3.2 3 2 1 (Release History)
 Summary of important uservisible changes
 General improvements
 Graphical User Interface
 Graphics backend
 Matlab compatibility
 Deprecated functions and operators
 Removed functions, properties, and features
 Alphabetical list of new functions added in Octave 7
General improvements

Many functions in Octave can be called in a command form—noparentheses for invocation and no return argument assignment—or in afunctional form—parentheses and ‘=’ for assignment of return values.
Command Form Example
mkdir new_directory
Function Form Example
status = mkdir ("new_directory")
Octave now handles errors that occur in a consistent manner. If called in command form and there is a failure, an error is thrown and a message printed. If called in functional form, no error or message is printed and the failure is communicated to the programmer via the output status variable.
The following list of functions have been modified.
copyfile
fcntl
fileattrib
kill
link
mkfifo
movefile
rename
rmdir
symlink
unlink

Calling a userdefined function with too many inputs or outputs is nowan error. The interpreter makes this check automatically. If afunction uses
varargin
then the check is skipped for function inputs,and if a function usesvarargout
then the check is skipped for functionoutputs. Input validation for functions typically begins with checkingthat the number of inputs and outputs match expectations. Existing codecan be simplified by removing these checks which are now done by theinterpreter. Typically, code blocks like the following can simply bedeleted.## Checking number of inputsif (nargin > 2) print_usage ();endif## Checking number of outputsif (nargout > 1) print_usage ();endif
(Video) Como instalar o GNU Octave no Windows  Computação Científica 
Binary and hexadecimal constants like
0b101
and0xDEADBEEF
nowcreate integers (unsigned by default) with sizes determined from thenumber of digits present. For example,0xff
creates auint8
valueand0xDEADBEEF
creates auint64
value. You may also use a suffix ofthe formu8
,u16
,u32
,u64
,s8
,s16
,s32
, ors64
toexplicitly specify the data type to use (u
ors
to indicate unsignedor signed and the number to indicate the integer size).Binary constants are limited to 64 binary digits and hexadecimalconstants are limited to 16 hexadecimal digits with no automaticrounding or conversion to floating point values. Note that this maycause problems in existing code. For example, an expression like
[0x1; 0x100; 0x10000]
will be uint8 (because of the rules ofconcatenating integers of different sizes) with the larger valuestruncated (because of the saturation semantics of integer values). Toavoid these kinds of problems either: 1) declare the first integer to beof the desired size such as[0x1u32; 0x100; 0x10000]
, or 2) padconstants in array expressions with leading zeros so that they use thesame number of digits for each value such as[0x00_00_01; 0x00_01_00; 0x01_00_00]
. 
The colon operator now works for integer (int8, int16, …, uint64)and single data types. However, only double ranges use amemoryefficient storage scheme internally. Other data types arestored as ordinary arrays.

The increment and decrement operators
++
and
must “hug” theircorresponding variables. In previous versions of Octave, whitespacesbetween these operators and the variable they affect were allowed. Thatis no longer the case.See AlsoTraditional bingo calls and their meanings: all the number nicknames and sayings 190Encontrar a alguien usando su número de teléfono (método gratis y fácil)ᐅ SPSS Free Download for Windows 10Aprendizaje Por Observación , Según La Teoría De Albert Bandura En Albert Bandura Y Psicopedagogia En Mp3  Tecnicas de aprendizaje 
The
mldivide
function (i.e., the\
operator) now uses an LUdecomposition to solve nearly singular full square matrices. This isMatlabcompatible and yields results which more nearly minimizenorm(A*x  b)
. Previously, Octave computed a minimumnorm solution. 
The
factor
function has been overhauled for speed. For largeinputs > 1e14, it can be up to 10,000 times faster. 
The
isprime
function uses a new primality testing algorithmthat is up to 50,000 times faster for inputs > 1e14. 
The
betainc
function now calculates an exact output for theimportant special cases where a or b are 1. 
The
whos
function now displays an additional attribute ‘s’ whenthe variable is a sparse type. 
As part of GSoC 2020, Abdallah K. Elshamy implemented the
jsondecode
andjsonencode
functions to read and write JSON data. 
As part of GSoC 2021, Abdallah K. Elshamy implemented the
jupyter_notebook
classdef class. This class supports running andfilling Jupyter Notebooks using the Octave language kernel from Octaveitself. Making the evaluation of longrunning Jupyter Notebooks on acomputing server without permanent browser connection possible. 
By default, the history file is now located at
$DATA/octave/history
,where$DATA
is a platform dependent location for (roaming) user datafiles (e.g.,${XDG_DATA_HOME}
or, if that is not set,~/.local/share
onUnixlike operating systems or%APPDATA%
on Windows). 
For Octave on Windows OS, the minimum required version of the WindowsAPI is now 6.1 (Windows 7 or newer).

The nonreentrant version of the QHull library “libqhull” wasdeprecated upstream. Octave now (optionally) requires the reentrantversion of that library “libqhull_r” instead.

Octave’s build system no longer appends “++” to the end of the“magick++” library name (set with the
withmagick=
configure flag).The real name of the “magick++” library (including any potentiallytrailing “++”) needs to be set in that option now.(Video) Minicurso Octave  Aula 7: Funções Matemáticas 
The
pkg update
command now accepts options that are passed topkg install
for each updated package. Specifyinglocal
orglobal
will restrict update checks to local or globalinstalled packages, respectively.
Graphical User Interface

The graphical user interface is now available in Hungarian andTurkish.

In debug mode, symbol values are now shown in tooltips when hoveringvariables in the editor panel.

The “Disable global shortcuts when Command Window has focus” GUIpreference under the Shortcuts tab is now disabled by default. Thisoption disables keyboard shortcuts to avoid interference with readlinekey strokes in the Command Window. Unlike versions prior to Octave 7,this preference now also affects the CtrlC/V shortcuts for copy/paste.

In command line mode, i.e. when Octave is started without the
gui
option,the doc command now opens the GUI documentation browser as a standalone widget,provided that Octave was compiled with GUI support.
Graphics backend

Support for Qt4 for both graphics and the GUI has been removed.

If a working LaTeX tool chain is found on the path, including
latex
,dvipng
, anddvisvgm
binaries, then text strings can now be renderedproperly when using the"latex"
value for the text objects’"interpreter"
property and axes objects’"ticklabelinterpreter"
.Typedoc "latex interpreter"
for further info. 
The
"Marker"
property for plot objects now accepts
which drawsa vertical line or_
which draws a horizontal line. 
The
FMT
format argument for plot commands now accepts long forms forcolor names which may be more understandable than the existingoneletter codes. For example, the RGB value[0 0 0]
can now bespecified by"black"
in addition to"k"
. 
The color graphics properties, for example
"EdgeColor"
or"FaceColor"
, now accept HTML specifications. An HTML specification isa string that begins with the character ‘#’ and is followed by either 3or 6 hexadecimal digits. For example, magenta which is 100% red andblue values can specified by"#FF00FF"
or"#F0F"
. 
The additional property
"contextmenu"
has been added to all graphicsobjects. It is equivalent to the previously used"uicontextmenu"
property which is hidden now. 
uicontrol
objects now fully implement the"Off"
and"Inactive"
values of the"Enable"
property. When the value is"Off"
, nointeraction with the object occurs and theuicontrol
changes color(typically to gray) to indicate it is disabled. When the value is"Inactive"
, the object appears normally (no change in color), but itis not possible to change the value of the object (such as modifyingtext in anEdit
box or clicking on aRadioButton
). 
The
"ListBoxTop"
property foruicontrol
objects has beenimplemented forset
commands. 
The
Title
property for print formats such as PDF or SVG is now setto the title displayed on the figure window which contains the plot. 
Additional properties have been added to the
axes
graphics object:(Video) Processamento Digital de Imagens com GNU Octave (7/13)"alphamap"
(not yet implemented)"alphascale"
(not yet implemented)"colorscale"
(not yet implemented)"fontsizemode"
(not yet implemented)"innerposition"
(equivalent to"position"
)"interactions"
(not yet implemented)"layout"
(not yet implemented)"legend"
(not yet implemented)"nextseriesindex"
(readonly, used byscatter
graphics objects)"positionconstraint"
(replacement for"activepositionproperty"
which is now a hidden property. No plans for removal.)"toolbar"
(not yet implemented)"xaxis"
(not yet implemented)"yaxis"
(not yet implemented)"zaxis"
(not yet implemented)
Matlab compatibility

The function
griddata
now implements the"v4"
Biharmonic SplineInterpolation method. In adddition, the function now accepts 3D inputsby passing the data togriddata3
. 
Coordinate transformation functions
cart2sph
,sph2cart
,cart2pol
, andpol2cart
now accept either row or column vectors forcoordinate inputs. A single coordinate matrix with one variable percolumn can still be used as function input, but a single output variablewill now contain just the first output coordinate, and will no longerreturn the full output coordinate matrix. Output size matches the sizeof input vectors, or in the case of an input matrix will be columnvectors with rows corresponding to the input coordinate matrix. 
The function
dec2bin
anddec2hex
now support negative numbers. 
The function
factor
now supports uint64 inputs larger thanflintmax
. 
The function
primes
now supports char inputs. 
The functions
quantile
andprctile
now permit operating ondimensions greater thanndims (x)
. 
The function
iqr
now uses Matlab compatible interpolation forquantile values. The dimension input now allows a vector, “all”, anddimensions greater thanndims (x)
. The function also handlesInf
andNaN
input values in a Matlabcompatible manner. 
The function
importdata
now produces more compatible results whenthe file contains a 2D text matrix. 
The file functions
copyfile
,mkdir
,movefile
,rmdir
now returna logical value (true/false) rather than a numeric value (1/0). 
uimenu
now accepts property"Text"
which is identical to"Label"
. Matlab recommends using"Text"
in new code, although thereis no announced date for deprecating"Label"
. 
The functions
scatter
andscatter3
now return a handle to ascatter graphics object. For compatibility, they return anhggroup
ofpatch graphics objects when the"gnuplot"
graphics toolkit is used. Inprevious versions of Octave, these functions returned anhggroup
ofpatch graphics objects for all graphics toolkits. 
The functions
bar
andbarh
now handle stacked negative bar valuesin a Matlabcompatible manner. Negative values now stack below the zeroaxis independently of a positive value bars in the same stack.Previously the negative bars could overlap positive bars depending ondrawing order. 
The functions
bar
andbarh
now use colors from the"ColorOrder"
axes property rather than the"Colormap"
figure property unless oneof the histogram options (@qcode{“hist”}, @qcode{“histc”} was specified. 
The function
saveas
now defaults to saving in Octave figure format(.ofig) rather than PDF (.pdf). 
A new warning ID (
"Octave:unimplementedmatlabfunctionality"
) hasbeen added which prints a warning when Octave’s parser recognizes validMatlab code, but for which Octave does not yet implement thefunctionality. By default, this warning is enabled.(Video) GNU Octave (GUI) 
When Octave is started with the
traditional
option for maximumcompatibility theprint_struct_array_contents
internal variable is setto true. 
The function
repelem
now produces a row vector output when the input isa scalar. 
The functions
var
andstd
now accept a weight vector as input andcompute the weigthed variance. Dimension input now allows a vector andthe keyword “all”.
Deprecated functions and operators
The following functions and operators have been deprecated in Octave 7and will be removed from Octave 9 (or whatever version is the secondmajor release after 7):

Functions
Function Replacement disable_diagonal_matrix
optimize_diagonal_matrix
disable_permutation_matrix
optimize_permutation_matrix
disable_range
optimize_range

Operators
Operator Replacement Description **
^
Matrix exponent .**
.^
Elementbyelement exponent .+
+
Elementbyelement addition .

Elementbyelement subtraction 
Interpreter

The use of
'...'
for line continuations inside doublequoted strings has been deprecated. Use'\'
for line continuations inside strings instead. 
The use of
'\'
as a line continuation outside of doublequoted strings has been deprecated. Use'...'
for line continuations instead. 
Any trailing whitespace after a
'\'
line continuation has been deprecated. Delete unnecessary trailing whitespace.

The following functions were deprecated in Octave 6 and will be removedfrom Octave 8 (or whatever version is the second major release after 6):

Functions
Function Replacement runtests
oruntests

The environment variable used by
mkoctfile
for linker flags is nowLDFLAGS
rather thanLFLAGS
.LFLAGS
was deprecated in Octave 6,and a warning is now emitted if it is used, but it will continue towork.
Removed functions, properties, and features
The following functions and properties were deprecated in Octave 5and have been removed from Octave 7.

Functions
(Video) Curso de Octave  Transposição e Referência em Arranjos #7Function Replacement output_max_field_width
output_precision
is_keyword
iskeyword

Properties
Object Property Value text
fontangle
"oblique"
uibuttongroup
fontangle
"oblique"
uicontrol
fontangle
"oblique"
uipanel
fontangle
"oblique"
uitable
fontangle
"oblique"

The prototype JIT compiler has been removed from Octave. Since it wasfirst added as part of a Google Summer of Code project in 2012, no onehas ever seriously taken on further development of it and it still doesnothing significant. It is out of date with the default interpreterthat walks the parse tree. Even though we have fixed the configurescript to disable it by default, people still ask questions about how tobuild it, but it doesn’t seem that they are doing that to work on it butbecause they think it will make Octave code run faster (it never did,except for some extremely simple bits of code as examples fordemonstration purposes only). The following functions related to theJIT compiler have also been removed:
debug_jit
,jit_enable
,jit_failcnt
, andjit_startcnt
.
Alphabetical list of new functions added in Octave 7
cospi
getpixelposition
endsWith
fill3
jsondecode
jsonencode
jupyter_notebook
listfonts
matlab.net.base64decode
matlab.net.base64encode
memory
ordqz
rng
sinpi
startsWith
streamribbon
turbo
uniquetol
xtickangle
ytickangle
ztickangle
FAQs
Is GNU Octave as good as Matlab? ›
MATLAB vs Octave are mainly used for the same purpose. The main difference is syntax and other features. Matlab consist of specialized toolboxes which are not part of Octave. They are not fully compatible that is code written in Matlab can crush in octave and vice versa.
What is GNU Octave used for? ›GNU Octave is a highlevel programming language primarily intended for scientific computing and numerical computation. Octave helps in solving linear and nonlinear problems numerically, and for performing other numerical experiments using a language that is mostly compatible with MATLAB.
What is the latest version of Octave? ›Octave Version 7.2. 0 has been released and is now available for download. An official Windows binary installer is also available. For macOS see the installation instructions in the wiki.
Does Octave work Windows 10? ›Octave is not completely compatible with Windows 10 and 8. If you install it on Windows 10 or 8, you will not see the typical “octave>” prompt, and certain functions, such as plotting, will not work. There is a workaround: 1.
Is Octave better than Python? ›The other thing Octave/Matlab has over Python: it's a lot easier and clearer to express numeric algorithms in Matlab than Python, as Python isn't designed as an array language.
Is Octave still used? ›Although Octave was initially meant for scientific computation, many organizations use it for basic data processing and plotting. It can also be used for machine learning, analyzing data, and building ML algorithms.
Is Octave software free? ›Free Matlab alternative
GNU Octave is a free, scientific programming language. It offers a rich mathematical apparatus, concise syntax, and has builtin visualization tools [1]. The whole package is really handy. It has a graphical user interface (GUI) and commandline interface versions.
Syntax Examples
The Octave interpreter can be run in GUI mode, as a console, or invoked as part of a shell script. More Octave examples can be found in the Octave wiki. Solve systems of equations with linear algebra operations on vectors and matrices. Visualize data with highlevel plot commands in 2D and 3D.
GNU stands for GNU's not Unix, which makes the term a recursive acronym, or an acronym in which one of the letters stands for the acronym itself. The GNU Project initially created most of the components and services used in GNU/Linux and later added the Linux kernel to create the GNU/Linux OS.
Can octave run on Windows? ›The Windows toolkit must be installed and then loaded to be used. It can be installed in GNU Octave directly from octaveforge, or can be installed in an offline mode via a downloaded tarball.
Is Python an octave? ›
It is an interpreted language like Python. Since Octave's syntax is mostly compatible with MATLAB, it is often described as a free alternative to MATLAB. Octave is not listed among the most popular programming languages, but MATLAB is, so Octave is rather popular in a sense.
How do I download octave GNU? ›Tutorial  How to Install Octave and using Octave  YouTube
How do I run GNU Octave? › navigate to editor tab at the bottom of command editor.
 Press Ctrl+O or Go to file and open your file.
 Pres F5 or Navigate to Run and Save and Run.
 Step 1: Visit the official website using any web browser.
 Step 2: Click on the Download button.
 Step 3: Next window open now click on MS Windows.
 Step 4: Next screen will open now click on the Octave 6.4.
To install a package, use the pkg command from the Octave prompt by typing: pkg install forge package_name , where package_name is the name of the package you want to install.
Is Octave difficult to learn? ›R, Octave and Python are flexible and easy to use for vectorization and matrix operations; they're not just dataanalysis packages, but also programming languages for creating one's own functions or packages.
Is MATLAB faster than Octave? ›Speed. The difference in performance between the two is very significant and undisputable, with MatLab often being twice or thrice as fast. MatLab which has been developed by a professional team, and which has more investment behind it, performs better than Octave.
Can Python replace MATLAB? ›For all of these reasons, and many more, Python is an excellent choice to replace MATLAB as your programming language of choice. Now that you're convinced to try out Python, read on to find out how to get it on your computer and how to switch from MATLAB! Note: GNU Octave is a free and opensource clone of MATLAB.
Can octave replace MATLAB? ›If you're looking for a project that is as close to the actual MATLAB language as possible, Octave may be a good fit for you; it strives for exact compatibility, so many of your projects developed for MATLAB may run in Octave with no modification necessary.
Is MATLAB better than Python? ›MATLAB has very strong mathematical calculation ability, Python is difficult to do. Python has no matrix support, but the NumPy library can be achieved. MATLAB is particularly good at signal processing, image processing, in which Python is not strong, and performance is also much worse.
How popular is octave? ›
Coming to the popularity standards, Octave is not that prominent in the public. The other programming languages are highly popular in the market and have massive community support. Also, the adaptability rate of the all these three is quite high as compared to octave for machine learning.
How much is an octave? ›Many musical scales encompass an octave; in the diatonic scales (major, minor, and modal) of Western music, the octave is an interval of eight notes. It is the only interval to appear as a constant in the musical scales of nearly every culture.
Is octave open source? ›GNU Octave is a free open source software (FOSS) package which is "mostly compatible" with MATLAB.
Is Matlab a coding? ›MATLAB is a highlevel programming language designed for engineers and scientists that expresses matrix and array mathematics directly.
Who is owner of octave? ›Current board members & directors are HARSH ARORA and SANJANA ARORA . Company is registered in Chandigarh (Punjab) Registrar Office. Octave Apparels Private Limited registered address is B33,325/5 G.T ROAD (WEST) NEW ASHOK NAGAR SIKAND COLD STORE WALI GALI,NEAR JALANDHAR BYEPASS LUDHIANA PB 141008 IN.
Where can I learn octave? › Free. University of Washington. ...
 Robotics: Aerial Robotics. ...
 University of Colorado Boulder. ...
 University of Colorado Boulder. ...
 University of Colorado Boulder. ...
 University of Colorado Boulder. ...
 Free. ...
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Octave comes from the Latin root “octo,” meaning eight. An octave represents the interval from one musical pitch or note to another. It is the distance from one note to the next note of the same name. It takes eight white keys to get to the next latternamed note, hence why we call it an octave.
Is Linux and GNU same? ›Linux is the kernel, one of the essential major components of the system. The system as a whole is basically the GNU system, with Linux added.
Is GNU an OS? ›What is GNU? GNU is an operating system that is free software—that is, it respects users' freedom. The GNU operating system consists of GNU packages (programs specifically released by the GNU Project) as well as free software released by third parties.
Why is it called GNU? ›The name “GNU” was chosen because it met a few requirements; first, it was a recursive acronym for “GNU's Not Unix,” second, because it was a real word, and third, it was fun to say (or sing). The word “free” in “free software” pertains to freedom, not price. You may or may not pay a price to get GNU software.
Can Octave replace MATLAB? ›
If you're looking for a project that is as close to the actual MATLAB language as possible, Octave may be a good fit for you; it strives for exact compatibility, so many of your projects developed for MATLAB may run in Octave with no modification necessary.
Which is easy MATLAB or Octave? ›MATLAB is probably a lot more powerful than Octave, and the algorithms run faster, but for most applications, Octave is more than adequate and is, in my opinion' an amazing tool that is completely free, where Octave is completely free.
Is octave online same as MATLAB? ›Welcome to Octave Online
Octave Online is a web UI for GNU Octave, the opensource alternative to MATLAB. Thousands of students, educators, and researchers from around the world use Octave Online each day for studying machine learning, control systems, numerical methods, and more.
Octave uses both the hash symbol # and the percent sign % interchangeably. For exponentiation, Octave can use ^ or ** ; MATLAB requires ^ . To end blocks, Octave can use end or specify the block with endif, endfor, ... ; MATLAB requires end .
What is better than MATLAB? ›GNU Octave
If you are looking for anything closer to Matlab in terms of compatibility and computational ability, then Octave is the best Matlab alternative. Most of the projects developed for Matlab run on Octave too. It runs on any Operating system without any modifications.
GNU Octave is a free, scientific programming language. It offers a rich mathematical apparatus, concise syntax, and has builtin visualization tools [1]. The whole package is really handy. It has a graphical user interface (GUI) and commandline interface versions.
Does Octave have GUI? ›The Octave interpreter can be run in GUI mode, as a console, or invoked as part of a shell script. More Octave examples can be found in the Octave wiki. Solve systems of equations with linear algebra operations on vectors and matrices.
What language is Octave written in? ›Octave is software featuring a highlevel programming language, primarily intended for numerical computations. It was developed by John W. Eaton and written in C, C++, Fortran languages.
How do I learn Octave? ›Octave Tutorial for Absolute Beginners: Learn Octave in 1 hr and 30 min
Is Octave popular? ›Coming to the popularity standards, Octave is not that prominent in the public. The other programming languages are highly popular in the market and have massive community support. Also, the adaptability rate of the all these three is quite high as compared to octave for machine learning.
Is Octave faster than MATLAB? ›
Is Octave as powerful as Matlab? Well, it has been seen that Matlab is more powerful as compared to Octave. Moreover, Matlab's algorithms are much faster than Octave's algorithms.
Is Octave a clone of MATLAB? ›As you've written: "The language [Octave] is almost identical to basic Matlab." When using _advanced_ instead of _basic_ Matlab features, the differences between these platforms become more considerable.
Is MATLAB better than R? ›Scale the code you've already written to large datasets
Out of the box, MATLAB is faster than R for common technical computing tasks, statistics, and machine learning, as described in the R benchmark 2.5 (also known as Urbanek), because MATLAB library calls are optimized, and code is justintime compiled.
Octave is mostly compatible with Matlab. Most matlab functions can be made to run with very little change. With careful coding, you can get your code to run without change in Matlab and Octave.
What is Octave in machine learning? ›Octave is an opensource interactive programming language widely used in machine learning and data analytics courses. Designed primarily for matrix computation, Octave is a powerful tool that enables the development of efficient engineering, data analytics and machine learning programmes.
Is MATLAB free? ›MATLAB Onramp
Learn MATLAB for free with handson, interactive lessons.