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pixelgrid

ContentsIntroductionFind the image objectGet the spatial coordinates for drawing the outlineConstruct the x- and y-vectorsDraw the linesIntroductionSome years ago, I blogged about how to overlay a pixel grid on an image, so that you could clearly see pixel boundaries on a zoomed-in view of the image. Something like this: I intended to submit the code to the File Exchange, but...

標簽: Uncategorized

Steve on Image Processing and MATLAB

2019-06-13 12:14:31

File Exchange はツールの寶庫

こんにちは、道家です。今日は File Exchange の紹介。 皆さん、このブログを読まれているという事は MATLAB Central はご存知という事かと思いますが、そこに File Exchange というファイル共有サイトが存在する事ご存知ですか。 File Exchange はユーザーの皆さんが作成された MATLAB プログラムや Simulink モデルを手軽に共有できるサイトです。數行の小さいプログラムもあれば、Toolbox のような規模のアプリケーションもあります。コメントや評価を付けたり、キーワードで検索することもできるので、3萬以上のエントリーの中からご自身が求めているプログラムをお探しできます。大半のエントリーは英語ですが、重要なのはすべて共通言語(MATLAB)で書かれていることです!私は MATLAB を使い始めたころ File Exchange からのプログラムを見ていろいろと勉強していました。 MathWorks の社員も多少は投稿していますが、殆どがコミュニティーからのコードです。 初めての方は、是非興味あるキーワードで検索し、ダウンロードしてみて下さい!コメントはこちら。...

標簽: Uncategorized

MATLAB ユーザーコミュニティー

2019-06-12 10:00:38

AIS Decoder

Idin's pick this week is AIS Decoder by our former colleague Mike Donovan. This example shows how to decode automatic identification system (AIS) signals sent out by commercial ships. The AIS standard was developed in the late 1990s and early 2000s. It is widely in use today for larger ships. See here for details. https://en.wikipedia.org/wiki/Automatic_identification_system Why...

標簽: Picks

File Exchange Pick of the Week

2019-06-10 12:52:56

大盛況! コミュニティイベント@MATLAB EXPO 2019

2019年5月28日に開催された MATLAB EXPO 2019 Japan?でのコミュニティイベントの様子をご紹介します。 MATLAB EXPO は年に1回のユーザーカンファレンスです。 年々參加者が増える中、MATLAB ユーザーが主體となって発信や交流をする場として盛り上げようと今年もコミュニティイベントを実施しました。 本記事ではポスター発表とMATLAB Lightning Talk について取り上げます。 【ポスター発表】 ポスター発表は MATLAB を用いて行った研究やプロジェクトの成果を発表する、學會発表などでお馴染みの企畫です。各大學、民間企業をはじめ、國立研究開発法人からも幅広いテーマで、14名の方からご発表いただきました。 発表いただいたポスターはこちらからご覧いただけます。 EXPO 來場者による人気投票のTop 3をご紹介します。 第1位:「Arduino-MATLABによるセンサ情報の取得 (その2)」- コニカミノルタ株式會社 西垣 森緒様 第2位:「スピーカーの狀態空間モデルと現代制御理論を用いた空間音響再現」- 株式會社 Trigence Semiconductor 巖村 宏様 第3位:「機械學習や 3 次元點群処理技術が切り拓く植物計測の技術革新」- 東京大學 大學院 板倉 健太様 ポスター投票第1位の発表の様子 西垣様は最多得票者の発表の瞬間もポスター前で質問に答えていたほど來場者の関心を集めていました。 【MATLAB Lightning Talk】 來場者によるアンケートに「EXPO で一番盛り上がっていた」とのお聲をいただいたのが MATLAB Lightning Talk です。 各自5分の持ち時間で MATLAB を使った面白ネタを発表する人気企畫なのですが、今年の盛況ぶりはさすがに想定外です。発表內容は殘念ながらご視聴いただけませんが、タイトルはこちら。想像通り?...

標簽: Uncategorized

MATLAB ユーザーコミュニティー

2019-06-06 09:45:55

New on MATLAB Central: Power Electronics and a Japanese Blog

Here are some Estonian phrases that might prove useful some day. Kas ma saan kohvi palun? Can I have some coffee, please? Kuidas sa ütled "eigenvalue" Eesti keeles? How do you say "eigenvalue" in Estonian? On selge et see maatriks ei ole sümmeetriline. This matrix is clearly far from symmetric. I was thinking about translation because I wanted to draw...

標簽: Uncategorized

MATLAB Community

2019-06-05 17:56:40

High School Students Create Fitness Trackers for MATLAB STEM Challenge

This week our guest blogger Jose Avendano is back to talk to us about the MATLAB STEM Challenge which concluded recently. In this challenge students from Franklin and Needham high schools created fitness trackers using MATLAB. MATLAB STEM Challenge As part of the student competitions team at MathWorks, we are involved with many different programming challenges. The MATLAB STEM...

標簽: Education, MATLAB, Skills, Team achievements

Racing Lounge

2019-06-05 09:36:36

Ensemble Learning

Combining Deep Learning networks to increase prediction accuracy. The following post is from Maria Duarte Rosa, who wrote a great post on neural network feature visualization, talking about ways to increase your model prediction accuracy. Have you tried training different architectures from scratch? Have you tried different weight initializations? Have you tried transfer learning using different...

標簽: Uncategorized

Deep Learning

2019-06-03 16:30:07

Memory Info

Sean's pick this week is Memory Info by Sviatoslav Danylenko. Have you ever wanted to get the current memory used by MATLAB? I do this occassionally at the command line and have done this in code to prevent creating an array that would cause me to use more memory than available RAM. A few years...

標簽: Picks

File Exchange Pick of the Week

2019-05-31 09:00:27

Image processing helps solve the age-old mystery of “Why do zebras have stripes?”

Why are zebras striped? The hypotheses are many and varied. Do the stripes work as camouflage, temperature regulation, or a barcode so that individuals are distinguishable in a herd? The most popular theory by far, dating all the way back to the 1870s and Charles Darwin’s theory of natural selection, was that the zebra stripes acted as a form of...

標簽: Uncategorized

Behind the Headlines

2019-05-30 12:01:25

Deep Learning for Student Competitions

In today’s post, Neha Goel is going to share an overview about how you can use MATLAB and Simulink for Developing Artificial Intelligent components in your competitions. Neha joined the team recently and focuses on deep learning and data science competitions. Also find a section in this post where Neha reveals what projects she is currently working on. -- Competitions...

標簽: Education, MATLAB, Skills, Workflow

Racing Lounge

2019-05-29 23:26:31

Welcome to Japan Community Blog!

日本のMATLABユーザーに向けた情報発信のためのブログを開設いたします。 各所で実施されているユーザー會の紹介 MathWorks 主催のユーザーイベント報告 File Exchange や MATLAB Answers の注目エントリー紹介 MATLAB 活用例や技術動向 などなど幅広くご紹介する予定です。 主に以下3人で擔當いたしますので、MATLAB Expo やセミナーなどでお會いしたときはお気軽にお聲がけください。 Megumi Sasaki (佐々木 恩恵、右): Marketing Communication Specialist Michio Inoue (井上 道雄、左): Application Engineer Jiro Doke (道家 治郎、中央): Customer Success Engineer またこんな紹介してほしいなどのご要望も遠慮なくコメント欄に記載ください。どうぞよろしくお願いいたします。...

標簽: Uncategorized

MATLAB ユーザーコミュニティー

2019-05-29 09:00:46

Big Data in MAT Files

Today's guest blogger is Adam Filion, a Senior Product Manager at MathWorks. Adam helps manage and prioritize our development efforts in data science and big data.MAT files are an easy and common way to store MATLAB variables to disk. They support all MATLAB variable types, have good data compression, and can be accessed or created from other applications through an...

標簽: Big Data

Loren on the Art of MATLAB

2019-05-29 08:27:26

Matrix Eigenvalue Dating Service

This is a summary of my talk at the conference Celebrating the Centenary of James H. Wilkinson's Birth at the University of Manchester, May 29.Jim Wilkinson knew that a matrix with badly conditioned simple eigenvalues must be close to a matrix with multiple eigenvalues. How can you find the nearest matrix where some of the eigenvalues have found their mates?Much...

標簽: Eigenvalues, Matrices, Numerical Analysis, People, Singular Values

Cleve’s Corner: Cleve Moler on Mathematics and Computing

2019-05-28 21:17:07

My Web Scraping App: Only Get HTML Content if Page List Changes

Currently, my (small scale) web scraping app reads the HTML content of the list of pages, then searches for pattern matches. I want to change it, so that it only reads the HTML content if the list of pages changes. This will make it quicker for me to iterate on different patterns. Features covered in this code-along style video include:...

標簽: App Designer, Code-Along, Format: Video

Stuart’s MATLAB Videos

2019-05-28 12:16:28

ThingSpeak functionality ships with R2019a

Jiro's Pick this week is ThingSpeak Support Toolbox by MathWorks Internet of Things Team.ThingSpeak is MathWorks' IoT platform. You can use ThingSpeak for free for non-commercial small projects, but you can also purchase a license with enhanced capabilities, such as the ability to send/receive more messages at a higher frequency.This Toolbox allows you to connect to ThingSpeak directly from your...

標簽: Picks

File Exchange Pick of the Week

2019-05-25 12:47:13

An Eigenvalue Sensitivity Example

On May 29-30, I plan to attend a conference, organized by Nick Higham, at the University of Manchester. The title of the conference isCelebrating the Centenary of James H. Wilkinson's BirthI am giving a talk about one of Wilkinson's favorite topics, how can perturbations of a matrix with sensitive eigenvalues produce a defective matrix with a multiple eigenvalue. I uncovered...

標簽: Eigenvalues, History, Matrices, Numerical Analysis

Cleve’s Corner: Cleve Moler on Mathematics and Computing

2019-05-22 12:00:30

How to Suppress Function Output

You may have noticed that we have some functions that return no output if none is requested, and yet some functions always return something, even if not asked. What's a good way to achieve this in MATLAB?I do want to point out that while we used to use this programming pattern more often, we have tended to back away from...

標簽: Coding Style

Loren on the Art of MATLAB

2019-05-21 22:00:28

Winners of eBAJA SAEINDIA 2019 use MATLAB and Simulink for their Vehicle Design

For today’s post, I would like to introduce you to Team Stallions from Nirma University. They recently secured overall 1st rank in eBAJA SAEINDIA 2019, Indore and are here to share their experience of using MATLAB and Simulink for their vehicle design. -- From our previous years’ experience, we learned that simulation is an important part of the design...

標簽: Automotive, Education, Simulink, Team achievements

Racing Lounge

2019-05-20 13:57:40

Multiresolution pyramids part 4: Image blending

Today I want to wrap up (for now) my series on multiresolution pyramids by showing you how to make this strange-looking fruit:This a slightly nontraditional demonstration of a technique called image blending. I first considered writing a blog about image blending when I saw an example recently that was posted inside MathWorks. I asked the engineer who wrote the example,...

標簽: Uncategorized

Steve on Image Processing and MATLAB

2019-05-20 07:00:21

What's Your Color Scheme?

Brett's Pick this week is MATLAB Schemer, by Scott Lowe.ContentsEasy manipulation of your MATLAB color scheme!MATLAB is customizable!Easy manipulation of your MATLAB color scheme!I'm curious: what color scheme do you use when you write code in MATLAB? Do you stick with the default, or have you customized the colors in your editor? And are those of you who use Linux...

標簽: Picks

File Exchange Pick of the Week

2019-05-17 09:00:07

Robot quickly teaches itself to walk using reinforcement learning

A team of researchers from the University of Southern California’s?Valero Lab built a relatively simple robotic limb that accomplished something simply amazing: The 3-tendon, 2-joint robotic leg taught itself how to move. Yes, autonomous learning via trial and error. The team was led by Professor Francisco Valero-Cuevas and doctoral student Ali Marjaninejad. Their research was featured on the cover of...

標簽: Uncategorized

Behind the Headlines

2019-05-16 15:09:12

Projects Export Profile

After my last post on FMU import and export, someone asked me if exporting a Simulink model to an FMU was a good way to hide the model and protect intellectual property. The answer is: No! An FMU is simply a compressed archive. If you try changing the extension of an FMU to .zip and extracting it, you will find...

標簽: Model Reference, Model-Based Design, Simulink Tips

Guy on Simulink

2019-05-16 12:42:43

Deep Learning for Signal Processing Applications

I’d like to introduce Frantz Bouchereau, development manager for Signal Processing Toolbox who is going to dive deep into insights on deep learning for signal processing, including the complete deep learning workflow for signal processing applications. It's a longer post than usual, but jam packed with actionable information. Enjoy! Introduction Today we will highlight signal processing applications using...

標簽: Uncategorized

Deep Learning

2019-05-13 15:45:15

Continued Fractions and Function "rat"

Let me tell you about MATLAB's controversial function rat.ContentsClassic ratAn exampleDon't try to hide itThe controversial algorithmpiLatexratpphiDIYClassic ratThe function rat is older than MathWorks. It was one of the 73 functions in my original Fortran MATLAB. Here is the help entry from 40 years ago. help rat RAT An experimental function which attempts to remove the roundoff error from...

標簽: Fun, History, Numerical Analysis, Precision

Cleve’s Corner: Cleve Moler on Mathematics and Computing

2019-05-13 12:00:03

Handling Multiple Match Tokens in My Web App

Now I want to modify the MATLAB app I recently made to scrape web pages, so that it can handle multiple multi-part patterns. i.e. where there are more than one token in the regular expression match pattern. I'll use this example where I want to find the href attributes and the link text for all the links on a web...

標簽: App Designer, Code-Along, Format: Video

Stuart’s MATLAB Videos

2019-05-08 09:41:37

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