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What is your unusual use of MATLAB?

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I remember reading a blog (maybe by Doug Hull) that someone uses MATLAB to send emails and check local weather. I am just wondering what is your unusual use of MATLAB. Maybe there is something that might surprise every one.
In answering a question today, I found out that I can use MATLAB to listen to online music.
system('C:\WINDOWS\system32\dllcache\wmplayer http://www.satelitemusical.net/mj-akon-hold-my-hand.wma')
Of course not really have to use MATLAB, but, it's cool.
What is your usage?
  2 Comments
madhan ravi
madhan ravi on 15 May 2019
infinite votes!!!!! This is an extraordinary thread . Thank you very much Fangjun. MATLAB at it's best!!!! Long live MATLAB!!!!

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Accepted Answer

Grzegorz Knor
Grzegorz Knor on 15 Sep 2011
My cat likes to chase the laser pointer. Once the battery has run out and I wrote a few lines of code to give him the entertainment :)
Something like that (Lissajous curve):
figure('menubar','none','color','k')
h = plot(sin(sqrt(2)*0+sqrt(3)),cos(sqrt(5)*0),'r.','MarkerSize',20);
xlim([-1 1])
ylim([-1 1])
axis off
for t=0.01:.01:100
set(h,'xdata',sin(sqrt(2)*t+sqrt(3)),...
'ydata',cos(sqrt(5)*t))
drawnow
end
  6 Comments
Walter Roberson
Walter Roberson on 27 Dec 2020
Riley Duffens could you expand on your question? Are you asking how to change the set(h) call into a plot() call? Are you asking how to change the plotting to use animatedline() ?

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More Answers (19)

Daniel
Daniel on 7 Aug 2011
In winter I use MATLAB as a bed warmer. I run a infinite loop with a lot of calculus and huge memory swapping on my laptop while it is in bed.
  1 Comment
Fangjun Jiang
Fangjun Jiang on 7 Aug 2011
That is ..., unbelievable!

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Andreas Goser
Andreas Goser on 9 Jun 2011
I used Simulink and the very first version of the Video and Image Processing Blockset to identify a roaming cat that disturbed our sleep and - err - introduced a smelling front door.
It helped. After 3 days, the cat was identified and I could speak with the owner.
  4 Comments

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Matt Fig
Matt Fig on 8 Jun 2011
This is funny, and kind of embarrassing to admit, but I use my timer function, remindme, to time my kid's corner time. If I am MATLAB-ing and there is a naughty behavior that warrants some corner time, I can simply set the reminder so I know I won't forget...
  11 Comments
K E
K E on 20 Feb 2012
How good is your code during the period when the kids is in the corner yelling? Sterling I bet.

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Aurelien Queffurust
Aurelien Queffurust on 16 Sep 2011
Using an uitable I enter every 2-3 days , the weight of my wife since 3 years ! Data are saved in a MAT-file. I use functions like polyfit to have a forecast of her weight in 1 week / 1 month. I also make some basic statistics like mean , min and max . I have called this utity "MATLAB fit". It worked fine until she was pregnant, the quadratic-polynomial fit became a polynomial of degree 10 ;)
  3 Comments
Walter Roberson
Walter Roberson on 10 May 2013
Sounds like a case of "overfitting" !

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Joachim Schlosser
Joachim Schlosser on 19 Aug 2011
I used MATLAB and sunposition-m to calculate sun position and ray-traced the somewhen expected multi-story buildings around. Based on that I decided which real estate in our city to buy, the left one or the right one.
  1 Comment
Fangjun Jiang
Fangjun Jiang on 19 Aug 2011
Hum, sounds like a complex task! Any interests from any real-estate agents?

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Sean de Wolski
Sean de Wolski on 9 Jun 2011
I originally wrote this function: FEX: imcensor to censor beer cans out of pictures that might appear online.
  2 Comments
Daniel Bryant
Daniel Bryant on 13 Feb 2021
nice, need to use that for the kardasians

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Steve Houghton
Steve Houghton on 21 Nov 2011
I was struggling to identify the fault with an old regulated power supply - as I had no circuit diagram or service information.
I traced out the circuit from the PCB and recreated it in SimElectronics. I then used a real oscilloscope on the real PCB to compare against the signals within the model using the standard Simulink scope. Worked very well and essentially provided me with a 'gold standard' piece of hardware to compare my failed unit against!

Jan
Jan on 8 Jun 2011
I've used Matlab 5.3 on an old (a fanless 486!) laptop as babyphon: Record 10 seconds through the microphon, forward the sound through a 16 m wire to a small speaker, if the activity is over a specific level.
  3 Comments
Jason Ross
Jason Ross on 9 Jun 2011
For #3, get the freeware utility "Toddler Trap". It traps all the keys so that little fingers don't cause harm. I'm sure you could call it with system() or code a similar thing in MATLAB.

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Junior
Junior on 24 Aug 2011
I wrote a utility function taking as inputs the characteristics of a house (such as the location, neighborhood etc) and returning a score. The function was meant to rank houses for me and help decide which house to go for... well, my wife ended up choosing a different house than the one my program had picked. J.
  2 Comments
Jan
Jan on 15 Sep 2011
Which computer language did your wife use to program her decision maker? Anyway, I hope you decided to live in the same house as your wife.

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Sean de Wolski
Sean de Wolski on 8 Jun 2011
I've used MATLAB to prank my coworkers. All of our powerful computers are connected so it's easy to modify anyone's mfiles.
A CSSM thread last year gave a creative and camouflaged way to rick roll someone, that's still the best.
  8 Comments
Paulo Silva
Paulo Silva on 16 Jun 2011
@Sean, just saw your question, never had much fun pranking people with MATLAB but often the code I share goes with small errors on purpose, it's fun to see if someone can repair the problem or not.
I would love to rickroll someone with MATLAB, when I started programming it was with Borland C++ 3.1 (or some version similar, can't remember), my favorite thing was to generate sounds, like buzzing and beeping, many times the computer never stopped doing the sound even after my program was closed, it was very funny to see all the class and teacher annoyed with the sounds.

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Paulo Silva
Paulo Silva on 9 Jun 2011
I used MATLAB to see how bad was the damage on my phone touch screen and to minimize the error, got the alignment values from the device and plotted them in a figure, it was really bad, I couldn't adjust the values and the touch screen had to be replaced.
  2 Comments
Paulo Silva
Paulo Silva on 9 Jun 2011
no big deal, I was working with the phone on my pocket and something sharp hit the screen, later at home I noticed that there was one huge offset on the position I pressed and the phone response.
It's one of those with windows mobile 6, there's one alignment tool that couldn't do the job (bad software) and the last way to change the alignment was to get/set the registry values, the values are points on the corners and center of the screen, so I plotted them with MATLAB to see the screen rectangle and have some idea what to change in order to reduce the offset (error on the position we press and the response), that saved me time because the device must be reboot after every change of the values.

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Titus Edelhofer
Titus Edelhofer on 19 Aug 2011
When we were building our house I used the Virtual Reality Toolbox from within Simulink to "walk" through the 3D model given to us by the architect. Was much easier to navigate then his vrml-viewer ;-).
  2 Comments
Titus Edelhofer
Titus Edelhofer on 24 Aug 2011
It is a VRML (Virtual Reality Modeling Language) file (extension .wrl).

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sreedevi
sreedevi on 21 Jan 2014
I used Matlab to calculate the selling price of clothes for my mother's textile business. I entered the cost price of all the clothes and generated a table of SP corresponding to different profit values. This was easier than using the calculator and helped my mother a lot. I also saved the result in a text file for later references.

Catie McVey
Catie McVey on 2 Sep 2015
Edited: Catie McVey on 2 Sep 2015
In high school I used MatLab's Image Analysis Toolbox to measure structural variations in the facial features of horses, and subsequently used the Statistics toolbox to create models that predict suitability of a given horse to a career in a specific show discipline using these facial biometrics (a new spin on an old cowboy trick). Throughout my undergraduate studies I have research how variability in facial structures of day-old piglets correlate to aggressive behaviors later in life using these same MatLab tools. This summer for my honors thesis research, I used MatLab's Computer Vision Toolbox to continuously track the movements of paint spots on a sow's nose and shoulder while she expressed nesting behaviors in the 10-hour period preceding the birth of her piglets. Currently trying to use the Signal Processing and Neural Network toolboxes to identify patterns in the time-position vectors generated from this algorithm that differentiate between sows with good and bad piglet survival outcomes. The ultimate goal of that project is to identify which nesting behaviors are most effective at priming a pig's maternal instinct so that future enrichment materials (toys) can be designed to stimulate these targeted behaviors, thus improving the welfare and performance of both sows and piglets concurrently.
  2 Comments
Jan
Jan on 24 Jun 2018
Johann Kaspar Lavater tried to classify human properties based on their faces. It was a serious failure.

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Jan
Jan on 9 Jun 2011
Edited: Jan on 24 Jun 2018
I've suggested to use the Matlab installation CD as an animated hardward smiley: CSSM: 25-Oct-2009
[EDITED] The link is dead. Summary: Some asked how to use Matlab to create a smiley. My answer was to use the CD and an Edding.

John D'Errico
John D'Errico on 14 Jun 2014
Long ago, I wrote a bridge hand simulator. Of course, the nice thing about MATLAB is that even after nearly 20 years, it still runs well and continues to answer my questions.
As a bridge player, there are often questions of probability that come up, for example, how often will you see hands with a specific shape and quality, specific high cards, etc. This tool has helped me many times to decide on the best meaning for a bidding sequence, or to help me learn what was the best way to play a bridge hand (after the fact of course.) I've also used it to create sets of hands for my partner and I to use as bidding practice.

Tim Davis
Tim Davis on 2 Sep 2015
I create mathematical artwork, translating music into visual art via MATLAB sparse matrices, FFTs, and an external package (graphviz) for drawing a graph.

Fangjun Jiang
Fangjun Jiang on 9 Jun 2011
This 'Parenting Toolbox' is a great idea. It reminds me that I've made my contributions. I wrote a program to help my kids on their math. It generates some random problems (addition, subtraction, multiplication or division with random numbers in a certain range) and asks for the answer. It is not that hard, right? Well, I added more features such as recording their sessions and tracking their progress. I compiled it into an executable so it can run on kids computer. It all worked but then Mom easily found a FREE website that can do all the above with fancy interface and great animation. It beat my program completely. That was a hard hit on my enthusiasm on Matlab.
  8 Comments
Fangjun Jiang
Fangjun Jiang on 16 Jun 2011
Really hard-to-believe and scary reality. Thanks for sharing!

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Brian Concannon
Brian Concannon on 21 Nov 2011
I use Matlab to execute the C code in our microcontroller's C code.
  2 Comments
Maddila
Maddila on 26 Nov 2012
how do u do that

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