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https://www.mathworks.com/matlabcentral/answers/2182045-why-can-t-i-renew-or-purchase-add-ons-for-m…
"As of January 1, 2026, Perpetual Student and Home offerings have been sunset and replaced with new Annual Subscription Student and Home offerings."
So, Perpetual licenses for Student and Home versions are no more. Also, the ability for Student and Home to license just MATLAB by itself has been removed.
The new offering for Students is $US119 per year with no possibility of renewing through a Software Maintenance Service type offering. That $US119 covers the Student Suite of MATLAB and Simulink and 11 other toolboxes. Before, the perpetual license was $US99... and was a perpetual license, so if (for example) you bought it in second year you could use it in third and fourth year for no additional cost. $US99 once, or $US99 + $US35*2 = $US169 (if you took SMS for 2 years) has now been replaced by $US119 * 3 = $US357 (assuming 3 years use.)
The new offering for Home is $US165 per year for the Suite (MATLAB + 12 common toolboxes.) This is a less expensive than the previous $US150 + $US49 per toolbox if you had a use for those toolboxes . Except the previous price was a perpetual license. It seems to me to be more likely that Home users would have a use for the license for extended periods, compared to the Student license (Student licenses were perpetual licenses but were only valid while you were enrolled in degree granting instituations.)
Unfortunately, I do not presently recall the (former) price for SMS for the Home license. It might be the case that by the time you added up SMS for base MATLAB and the 12 toolboxes, that you were pretty much approaching $US165 per year anyhow... if you needed those toolboxes and were willing to pay for SMS.
But any way you look at it, the price for the Student version has effectively gone way up. I think this is a bad move, that will discourage students from purchasing MATLAB in any given year, unless they need it for courses. No (well, not much) more students buying MATLAB with the intent to explore it, knowing that it would still be available to them when it came time for their courses.
Hello - I have a new account and when I click My Channels, I don't get a drop down menu with choices like My Channels, My Image Channels, ect. I only get Public Channels when I click the Channels tab. I can't select My Channels. Could someone please help me?
Thank you
Meta threads have a tendency to grow large. This has happened several times before (the wishlist threads #1 #2 #3 #4 #5, and 'What frustrates you about MATLAB?' #1 and #2).
No wonder that a thread from early 2011 has also kept growing. After just under a decade there are (at time of writing) 119 answers, making the page slow to load and navigate (especially on mobile). So after a friendly nudge; here is a new thread for the things that are missing from Matlab.
Same question: are there things you think should be possible in Matlab, but aren't? What things are possible with software packages similar to Matlab that Matlab would benefit from? (note that you can also submit an enhancement request through support, although I suspect they will be monitoring activity on this thread as well)
What should you post where?
Next Gen threads (#1): features that would break compatibility with previous versions, but would be nice to have
@anyone posting a new thread when the last one gets too large (about 50 answers seems a reasonable limit per thread), please update this list in all last threads. (if you don't have editing privileges, just post a comment asking someone to do the edit)
Let's say MathWorks decides to create a MATLAB X release, which takes a big one-time breaking change that abandons back-compatibility and creates a more modern MATLAB language, ditching the unfortunate stuff that's around for historical reasons. What would you like to see in it?
I'm thinking stuff like syntax and semantics tweaks, changes to function behavior and interfaces in the standard library and Toolboxes, and so on.
(The "X" is for major version 10, like in "OS X". Matlab is still on version 9.x even though we use "R20xxa" release names now.)
What should you post where?
Next Gen threads (#1): features that would break compatibility with previous versions, but would be nice to have
@anyone posting a new thread when the last one gets too large (about 50 answers seems a reasonable limit per thread), please update this list in all last threads. (if you don't have editing privileges, just post a comment asking someone to do the edit)
Summary:
Dynamically accessing variable names can negatively impact the readability of your code and can cause it to run slower by preventing MATLAB from optimizing it as well as it could if you used alternate techniques. The most common alternative is to use simple and efficient indexing.
Explanation:
Sometimes beginners (and some self-taught professors) think it would be a good idea to dynamically create or access variable names, the variables are often named something like these:
- matrix1, matrix2, matrix3, matrix4, ...
- test_20kmh, test_50kmh, test_80kmh, ...
- nameA, nameB, nameC, nameD,...
Good reasons why dynamic variable names should be avoided:
- Slow
- Buggy
- Security Risk
- Difficult to Work With
- Obfuscated Code Intent
- Confuses Data with Code
- Code Helper Tools do not Work
- Magically Making Variables Appear in a Workspace is Risky
There are much better alternatives to accessing dynamic variable names:
- Indexing into Cell Array or ND-Array
- Non-scalar Structures (with Indexing)
- Dynamic Field-Names in a Structure
- load into a Structure, not into the Workspace
- save the Fields of a Scalar Structure
- Use a table or timetable Array
- Use more Efficient Ways to Pass Variables Between Workspaces
Note that avoiding eval (and assignin, etc.) is not some esoteric MATLAB restriction, it also applies to many other programming languages as well:
MATLAB Documentation:
If you are not interested in reading the answers below then at least read MATLAB's own documentation on this topic Alternatives to the eval Function, which states "A frequent use of the eval function is to create sets of variables such as A1, A2, ..., An, but this approach does not use the array processing power of MATLAB and is not recommended. The preferred method is to store related data in a single array." Data in a single array can be accessed very efficiently using indexing.
Note that all of these problems and disadvantages also apply to functions load (without an output variable), assignin, evalin, and evalc, and the MATLAB documentation explicitly recommends to "Avoid functions such as eval, evalc, evalin, and feval(fname)".
The official MATLAB blogs explain why eval should be avoided, the better alternatives to eval, and clearly recommend against magically creating variables. Using eval comes out at position number one on this list of Top 10 MATLAB Code Practices That Make Me Cry. Experienced MATLAB users recommend avoiding using eval for trivial code, and have written extensively on this topic.
💡About
First, I would like to thank everyone who has downloaded my eds-classification repository so far. This post is meant for those who are currently using the repository or may be interested in using the repository in their research.
To keep things short, I have released v2.0 of the eds-classification series on GitHub and the File Exchange. The update comes with significant changes to the repository structure and functions, and so it is worth noting that the update will likely be incompatible with any scripts written using prior releases.
The update provides several key new features that are meant to improve usability and producton. If you are interested in seeing how eds-classification may help you with your mineralogy research, please check out the release notes for v2 and consider giving the repository a try.
Respectfully,
Austin
📝Release Notes
The full release notes for v2 are available here: https://github.com/weber1158/eds-classification/releases/tag/v2.0
⬇️Download Now
AI writes all my code now
18%
Multiple times a day
24%
A few times a week
15%
A few times a month
7%
Only for suggestions
22%
It is not allowed for my work
15%
643 个投票
Hello everyone,
Today, we have a wide range of models available for problem-solving, education, and agentic coding. Picking a model for a task itself is a skill worth learning and exploring. We have a bouquet of closed models from Anthropic, OpenAI, Grok (Cursor), Mistral, and Gemini, as well as open-source models like Kimi and Gemma.
I am wondering whether, as a MathWorks community, we can come up with some benchmarks tailored for MATLAB + AI models by choosing and compiling tasks like plotting (graphing), some matrix problems, signal processing tasks, control system problems and other engineering problems, and then test AI model with Matlab-MCP server and document performance.
Reaching a consensus would really help us choose a certain model for certain tasks. That way, we can save API tokens, be smart with our choices and as a community, we can learn and help by sharing our experiences. I would love to hear your thoughts and see what this conversation could lead to.
@Hans Scharler do you have any initial thoughts to share with us?
Solve coding problems. Improve MATLAB skills. Have fun. See details and register .
We are excited to announce that Adam Danz has accepted our invitation and now is a member of the Community Advisory Board (CAB)!
Adam has been a rising star in Answers, obtaining 4500+ reputation points in the past year! Furthermore, he has contributed high-quality files to File Exchange, with an average rating of 4.8. Adam also demonstrates good communication skills and the ability to work with others. Those characteristics are what we expect to see from a CAB advisor. You can learn more about him and CAB on the CAB page .
On behalf of all the community team, we would like to extend our warmest welcome to Adam!
MATLAB Copilot / Simulink Copilot
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ChatGPT, Claude, MS Copilot, etc.
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AI coding agents with MCP Server
12%
AI coding agents without MCP Server
2%
I am using different tooling
2%
I am not using any AI tooling
25%
199 个投票
I often see the need of argument validation for which the arguments depend on each other.
function result = myFcn(points, attributes, queryIdx)
% INPUT
% points: [Nx3]
% attributes: [Nx1]
% queryIdx: [Mx1]
%
% OUTPUT
% result: [Mx1]
end
points and attributes depend in size, queryIdx and result as well. The current arguments/end block does not allow to formulate such constraints. The best you can do currently is
function result = myFcn(points, attributes, queryIdx)
arguments(Input)
points (:,3)
attributes (:,1)
queryIdx (:,1)
end
arguments(Output)
result (:,1)
end
assert(height(points) == height(attributes), "Argument validation failed")
...
assert(height(queryIdx) == height(result), "Argument validation failed")
end
Reading just the header without additional comments is unclear for a developer and prone to misunderstanding.
What do you think of the following language extension proposal?
function result = myFcn(points, attributes, queryIdx)
arguments(Input)
points (N,3)
attributes (N,1)
queryIdx (M,1)
end
arguments(Output)
result (M,1)
end
end
The intention is clear for the reader at first sight and gives you guarantees about input/output parameters (in contrast to simple comments). Validating the parameter "points" sets the (temporary) variable N, which can be reused in further argument validations. To be discussed if N and M are valid just within the arguments block or also in the whole function.
What is your opinion on such a language improvement?
Annular, sector, triangular, and cluster heatmaps can all be produced by this tool：https://www.mathworks.com/matlabcentral/fileexchange/125520-special-heatmap
Demo: Group Sep with non-square matrix
Data = rand(3, 12);
SHM = SHeatmap(Data, 'Format','sq');
SHM.RowName = {'Off-peak', 'Peak', 'Regular'};
SHM.ColName = {'Beijing', 'Shanghai', 'Guangzhou', 'Shenzhen'};
SHM.ColGroup = [1,1,1,1, 2,2,2,2, 3,3,3,3];
SHM.draw().setFrame()
Demo: Merge two triangle heatmaps
% Made up some data casually (随便捏造了点数据)
X = randn(20,15) + [(linspace(-1,2.5,20)').*ones(1, 6), (linspace(.5,-.7,20)').*ones(1, 5), (linspace(.9,-.2,20)').*ones(1, 4)];
% Get the correlation matrix (求相关系数矩阵)
Data = corr(X);
figure()
SHM_m1 = SHeatmap(Data, 'Format','sq').draw().setType('tril');
SHM_m1.setColLabel('Visible','off').setText()
SHM_m2 = SHeatmap(Data, 'Format','hex').draw().setType('triu0');
SHM_m2.setRowLabel('Visible','off').setColLabel('Visible','on') % Show the hidden Var-1 label (显示隐藏的 Var-1 标签)
Demo: Circular heatmap with Group Block and GroupSep
% Circular heatmap is currently supported only for
% SHeatmap with 'sq' Format and 'full' Type.
rng(1)
Data = randn(100, 5);
rowName = compose('row-%d', 1:100);
colName = compose('col-%d', 1:5);
rowGroup = [ones(1, 25), 2.*ones(1, 15), 3.*ones(1, 20), 4.*ones(1, 20), 5.*ones(1, 20)];
rowColor = [187,207,232; 222,236,247; 253,253,253; 251,225,216; 231,184,192]./255;
rgnames = {'Group-R1','Group-R2','Group-R3','Group-R4','Group-R5'};
% create figure (图窗创建)
fig = figure('Units','normalized', 'Position',[.1,.05,.5,.72]);
ax = axes('Parent',fig, 'Position',[.1,.1,.75,.75]);
% Draw group block (绘制分组方块)
SCB_L = SClusterBlock(ax, rowGroup, 'Orientation','left', 'ColorList',rowColor, 'Group',rowGroup, 'GroupSep',2.5);
SCB_L.draw(); SCB_L.setXYTLim('XLim',[1.65,1.95], 'YLim',[0, 1], 'TLim',[-3*pi/2, pi/3]);
% Draw circular heatmap (绘制环形热图)
SHM = SHeatmap(ax, Data, 'Format','sq', 'RowGroup',rowGroup, 'GroupSep',2.5);
SHM.TickLength = .3;
SHM.draw();
SHM.setRowName(rowName)
SHM.setColName(colName)
SHM.setRowLabelLocation('right')
SHM.setColLabelLocation('top')
% YLim(1) -> TLim(1), YLim(2) -> TLim(2)
SHM.setXYTLim('XLim',[2, 3], 'YLim',[0, 1], 'TLim',[-3*pi/2, pi/3]);
SHM.Colorbar.Position(1) = SHM.Colorbar.Position(1) + .1;
gHdl = text(ax, SCB_L.X, SCB_L.Y, rgnames, 'FontSize',14, 'FontName','Times New Roman');
setTextPerpRadial(gHdl)
colormap(slanCM(97, 32))
More than 50 examples are incorporated into this tool：
Absolutely!
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26 个投票
<80 characters
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80 characters
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100 characters
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120 characters
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>120 characters
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something else (comment below)
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198 个投票
Uniform spacing and the problem of round-off error
The vector [3 4 5 6 7 8 9] is uniformly spaced with a step size of 1. So is [3 2 1 0 -1 -2] but with a step size of -1.
The vector [1 2 4 8] is not uniformly spaced.
A vector v with uniform spacing has the same finite interval or step size between consecutive elements of the vector. But sometimes round-off error poses a problem in calculating uniformity.
Take, for example, the vector produced by
format shortg
v = linspace(1,9,7)
v = 1x7
1 2.3333 3.6667 5 6.3333 7.6667 9
Linspace produces linearly spaced vectors but the intervals between elements of v, computed by diff(v), are not identical.
dv = diff(v)
dv = 1x6
1.3333 1.3333 1.3333 1.3333 1.3333 1.3333
dv == dv(1)
ans = 1×6 logical array
1 0 0 1 0 1
diff(dv)
ans = 1x5
4.4409e-16 0 -4.4409e-16 8.8818e-16 -8.8818e-16
Some extra steps are therefore necessary to set a tolerance that ignores error introduced by floating point arithmetic.
New in R2022b: isuniform
Determining uniformity of a vector became a whole lot easier in MATLAB R2022b with the new isuniform function.
isuniform returns a logical scalar indicating whether vector v is uniformly spaced within a round-off tolerance and returns the step size (or NaN if v is not uniform).
Let's look at the results for our vector v,
[tf,step] = isuniform(v)
tf = logical
1
step =
1.3333
How about non-uniformly spaced vector?
[tf,step] = isuniform(logspace(1,5,4))
tf = logical
0
step =
NaN
Give it a shot in MATLAB R2022b
- What happens when all elements of v are equal?
- Can you produce a vector with uniform spacing without using colons or linspace?
- What additional steps would be needed to use isuniform with circular data?
References
- isuniform - documentation
- Floating point numbers - documentation
- Floating point numbers - Cleve's Corner (blog)
This article is attached as a live script.
How does MATLAB ThingSpeak Work ?
What did you guys do? It's impossible to edit figures on the fly now. Even simple things like removing data series and then removing them from the legend have become impossible without meddling with code. It used to be you could do little touch ups and even copy series from one figure to the next in the most expeditious and simple way, that to me was a big plus of using Matlab over python. Now this is so backwards and unintuitive, what were you guys thinking?
What is it?
SimFunction allows you to perform multiple simulations in a single line of code by providing an interface to execute SimBiology® models like a regular MATLAB function.
Consider the following similarity: If you want to calculate the value of the sine function at multiple times defined in the variable t, you use the following syntax:
y = sin(t)
If mymodel represents a SimFunction, you can simulate your model with multiple parameter sets using the following syntax:
simulationData = mymodel(parameterValues, stopTime, dose)
What is it good for?
Multiple simulations
Because it allows you to perform multiple simulations in a single line of code by providing a matrix of parameter values or variants or a cell array of dosing tables, it is particularly suited for
- parameter and dose scans
- Monte Carlo simulations
- customized analyses that require multiple model simulations such as a customized optimization
Performance
SimFunctions are optimized for performance as they are automatically accelerated at the first function execution, which converts the model into compiled C code. Those simulations can be distributed to multiple cores or to a cluster and run in parallel if Parallel Computing Toolbox™ is available thanks to its built-in parallelization or within a parfor loop.
Simulation deployment
Since SimFunction objects cannot be changed once created, they can be shared with others without the risk of altering the model inadvertently.
Also, you can use SimFunctions to integrate a SimBiology model into a customized MATLAB App and compile it as a web app or standalone executable to share with anyone without the need of a MATLAB license.
How does it work?
- which parameters it should take as inputs
- which targets will be dosed
- which model quantities it should return
- which sensitivities it should return if any
Have a look at the following example from the SimBiology documentation for an executable script to help you get started: Perform a Parameter Scan.
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Discussions is a user-focused forum for the conversations that happen outside of any particular product or project.
Get to know your peers while sharing all the tricks you've learned, ideas you've had, or even your latest vacation photos. Discussions is where MATLAB users connect!
Get to know your peers while sharing all the tricks you've learned, ideas you've had, or even your latest vacation photos. Discussions is where MATLAB users connect!
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