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Image Analyst
Last activity 2023 年 10 月 16 日

MATLAB is the best programming language

MATLAB is the best programming language

Image Analyst
Last activity 2023 年 10 月 16 日

I think this is the beginning of a beautiful friendship.

Casablanca

Image Analyst
Last activity 2023 年 10 月 16 日

MATLABlypse Now

I love the smell of debugged MATLAB code in the morning. Smells like...Victory!

https://thingspeak.com/channels/2278931

Shore
Last activity 2023 年 10 月 16 日

Halloween Analysis using Thingspeak

Halloween Analysis of Many Aspects of Halloween Headquarters and Effects on USA

(Note to Chistopher: I used a simple ESP8266 generating random numbers for fields 1 thru 7, (0 to 100, 4000, 127, 30, 45, 200,000, 50,000) and 0 to 1 for field 8. And a couple of real sensor inputs.

Halloween Analysis

Ideas

Chen Lin
Last activity 2023 年 11 月 3 日

AI + Community: How Can We Embrace Generative AI to Enhance Community Management

In the past year, we've witnessed an exponential growth of ChatGPT and other Generative AI tools. AI has quickly become a transformative force across industries, from tech giants to small startups, and even community sites like ours. For instance, Stack Overflow announced its plan to leverage AI tools to draft a question or tag content; Quora built a ChatGPT bot to answer questions; and GitHub is piloting the AI tool for personalized content.

This trend in the community landscape makes me wonder what MATLAB Central community, especially in MATLAB Answers, can do to integrate AI and enhance the community.

Share with us your ideas in the comment session. Ideally one comment per idea, so that others can vote on a secific idea or have deeper discussions about it.

Ideas

Chen Lin
Last activity 2023 年 10 月 11 日

Do you like the channels we have in Discussions area?

We launched the Discussions area with 6 channels, based on the existing types of content we see today in the MATLAB Central community.

I'm curious which channels you are most interested in participating, or which channels are missing.

Tell us your thoughts here!

channels

https://www.youtube.com/watch?v=h376W93gQq4

Walter Roberson
Last activity 2023 年 10 月 6 日

full body keyboard using flag semaphore

This person used computer version to build a keyboard input, and used standard flag semaphore for the positions.

Flag semaphore is used mostly by sailors to be able to communicate optically over a distance; it does not need anything more than make-shift flags (but binoculars or telescopes can help.) Trained users can go faster than you might guess.

Hans Scharler
Last activity 2024 年 7 月 27 日

What's everyone doing today?

Chen, Rena, and I are at a community management event. It's great to be with others talking about relationships, trust, and co-creation.

community

Chen Lin
Last activity 2023 年 10 月 16 日

The Community Snacks!

I'm in a community conference in Boston today and see what snacks we get! The organizer said it's a coincidence, but it's definitly a good idea to have them in our MathWorks community meetings.

community

https://www.youtube.com/watch?v=UTUnVEiO-TU

Walter Roberson
Last activity 2023 年 12 月 27 日

Tricking AI vision systems

A research team found a way to trick a number of AI systems by injecting carefully placed nonsense -- for example being able able to beat DeepMind's Go game.

https://www.youtube.com/watch?v=SsGEcLwjgEg

Walter Roberson
Last activity 2023 年 10 月 4 日

"Cody" bridge rotates up to move out of the way

This video discusses the "Cody" bridge, which is a pedestrian bridge over a canal that has been designed to move up and out of the way when ships need to travel through. The mathematics of the bridge movement are discussed and diagrammed. It is unique and educational.

https://fb.watch/njjZFdCnC1/

Walter Roberson
Last activity 2023 年 10 月 4 日

touch microscope developed

Recently developed: a "microscope" based on touch and stereo vision.

Using touch removes the possibility of optical confusion -- for example, black on touch is only due to shape, not due to the possibility that the object has a black patch.

Sorry, you might need a Facebook account to watch the video.

Image Analyst
Last activity 2023 年 10 月 3 日

The new release is here!

(Sorry - it should be 2023b by now.)

Mike Croucher
Last activity 2024 年 5 月 10 日

spy easter egg

spy

Rena Berman
Last activity 2023 年 10 月 11 日

PUZZLE: MATLAB-related word scramble

To solve the puzzle, first unscramble each of the words on the left. Then rearrange the letters in the yellow shaded boxes to complete the sentence on the right.

If you enjoyed this puzzle let me know with a like or in the comments below and I'll post more of them. Please don't post your answer, or any hints, and spoil it for those who come across this puzzle after you!! If you want to check your answer, you can messge me your guess through the link on my profile card (click on my name, Rena Berman, above and then on the envelope icon in the top right corner of the profile card that appears).

Mayla
Last activity 2023 年 9 月 19 日

Problem 1899. Convert a Cell Array into an Array

Thats the task:

Given a square cell array:

x = {'01', '56'; '234', '789'};

return a single character array:

y = '0123456789'

I wrote a code that passes Test 1 and 2 and one that passes Test 3 but I'm searching a condition so that the code for Test 3 runs when the cell array only contains letters and the one for Test 1 and 2 in every other case. Can somebody help me?

This is my code:

 y = []
[a,b]=size(x)
%%TEST 3
delimiter=zeros(1,a)
delimiter(end)=1
delimiter=repmat(delimiter,1,b)
delimiter(end)=''
delimiter=string(delimiter)
y=[]
for i=1:a*b
      y = string([y x(i)])
end
y=join(y,delimiter)
y=erase(y,'0')
y=regexprep(y,'1',' ')
%%TEST 1+2
for i=1:a*b
      y = string([y x(i)])
      y=join(y)
  end
  y=erase(y,' ' )

Mayla
Last activity 2023 年 9 月 13 日

Problem 2022. Find a Pythagorean triple

That's the question: Given four different positive numbers, a, b, c and d, provided in increasing order: a < b < c < d, find if any three of them comprise sides of a right-angled triangle. Return true if they do, otherwise return false .

I wrote this code but it doesn't pass test 7. I don't really understand why it isn't working. Can somebody help me?

function flag = isTherePythagoreanTriple(a, b, c, d)
a2=a^2
b2=b^2
c2=c^2
d2=d^2
format shortG
  if a2+b2==c2
      flag=true
  else if a2+b2==d2
          flag=true      
  else if a2+c2==d2
           flag=true
  else if c2+b2==d2
           flag=true
  else flag=false
  end
  end
  end
  end
end

Mayla
Last activity 2023 年 10 月 24 日

Problem 44952. Find MPG of Lightest Cars

That's the question:

The file cars.mat contains a table named cars with variables Model, MPG, Horsepower, Weight, and Acceleration for several classic cars.

Load the MAT-file. Given an integer N, calculate the output variable mpg.

Output mpg should contain the MPG of the top N lightest cars (by Weight) in a column vector.

I wrote this code and the resulting column vector has the right values but it doesn't pass the tests. What's wrong?

function mpg = sort_cars(N)
load cars.mat
sorted=sortrows(cars,4)
mpg = sorted(1:N,2)
end