Cleve Moler

MathWorks

Last seen: Today | Active since 2012

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The world's first MATLAB programmer.

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Published

Travel Report, JUIT, India
I was invited recently to give a virtual talk to the student chapter of SIAM at JUIT, the Jaycee Institute of Information...

12 days ago

Solved

Find the maximum number of decimal places in a set of numbers
Given a vector or matrix of values, calculate the maximum number of decimal places within the input. Trailing zeros do not count...

3 months ago

Published

Wordler and I Fail on Puzzle 1497
Like millions of other folks, I play Wordle from the New York Times almost every day. The Times reports that Wordle puzzle...

3 months ago

Published

My Favorite MATLAB Demos
In 1988, while I was with Ardent Computer in Silicon Valley, I gave a talk that previewed MATLAB graphics. The title was...

3 months ago

Published

Trip Report, Householder XXII
The twenty-second Householder Symposium on Numerical Linear Algebra was held June 8 - June 13 at Cornell. The local...

4 months ago

Published

A Million Dollar Matrix
The twenty-second Householder Symposium on Numerical Linear Algebra is this week, June 8 - June 13, 2025 at Cornell. My...

4 months ago

Published

Revolving Century Puzzle and Magic Squares
The Revolving Century puzzle is a beautifully made wooden puzzle from Creative Crafthouse in Hudson, Florida.... read more...

6 months ago

Published

L-systems, Plants, Fractal Curves, Turtles and Dragons
No, this is not the script for an episode of "Game of Thrones". It is a blog post about Lindenmayer grammars, growing...

6 months ago

Published

The Hat, a Tridecagon Aperiordic Monotile
Two years ago, in March of 2023, an unlikely team of mathematical hobbyists announced the discovery of a remarkable...

7 months ago

Published

Matrices at an Exposition
A look at the structure, and the eigenvalues and singular values of interesting test matrices....

8 months ago

Published

Two Flavors of SVD
MATLAB has two different ways to compute singular values. The easiest is to compute the singular values without the...

8 months ago

Published

LUTool, Animation of Gaussian Elimination
LUTool provides an interactive animation of Gaussian elimination, the most important algorithm in technical...

9 months ago

Published

Code for Sonic and Ten Sonic Movies
Two previous blog posts, Dec. 12, 2024 and Nov. 16, 2024, introduced "Sonic", my new tool for incorporating sound in...

10 months ago

Published

Sonic Adds Sound to Logo, Recamán, Chaos
I introduced Sonic in my blog post last month. Today I will use Sonic to add sound to the graphics from three old posts,...

11 months ago

Published

Lights, Camera, Action — and Sound
I am very excited to incorporate sound in animations. This blog post has five examples with links to videos enclosed in '+...

11 months ago

Published

Möbius, Mertens and Redheffer
Recently, I have made a series of blog posts about Redheffer matrices and the Mertens conjecture. After each of the posts,...

1 year ago

Published

Experience With Chatbots Generating MATLAB
A friend is investigating the use of generative AI in his classes. I asked two different popular chatbots to write MATLAB...

1 year ago

Published

Redheffer and Mertens, Accelerated
Shortly after I published the second post about the Mertens conjecture, a reader's comment suggested a new approach to...

1 year ago

Published

Redheffer and Mertens, Continued
Shortly after I posted Redheffer, Mertens and One-Million Dollars a few days ago, Mathworks' Pat Quillen made an important...

1 year ago

Published

Redheffer, Mertens and One-Million Dollars
I didn't know anything about these topics until a couple of weeks ago. Now I can't stop thinking about them.... read more...

1 year ago

Published

NA_Digest and NA_Net
The NA-Digest is an electronic newsletter for the numerical analysis and scientific software community. The NA-Digest is...

1 year ago

Published

A Treacherous SVD
A few days ago, a bug report from our office in Cambridge caught my attention. Computing the singular values and singular...

1 year ago

Published

SuperSum, In Defense of Floating Point Arithmetic
Floating point arithmetic doesn't get the respect it deserves. Many people consider it mysterious, fuzzy, unpredictable....

1 year ago

Published

IBM Hexadecimal Floating Point
Our technical support group recently received a request for a tool that would convert IBM System/360 hexadecimal floating...

1 year ago

Published

A Sixty-Year Old Program for Predicting the Future
The graphics in my post about R^2 were produced by an updated version of a sixty-year old program involving the U.S....

1 year ago

Published

R-squared. Is Bigger Better?
The coefficient of determination, R-squared or R^2, is a popular statistic that describes how well a regression model fits...

1 year ago

Published

Closest Pair of Points Problem
The Closest Pair of Points problem is a standard topic in an algorithms course today, but when I taught such a course fifty...

1 year ago

Published

Twenty Years of Parallel MATLAB
I have just returned from the MathWorks company meeting celebrating our 40th Anniversary. In one of the presentations, Jos...

1 year ago

Published

Chaotic Swinging Sticks
The Swinging Sticks is a kinetic sculpture that exhibits chaotic motion. The device became very popular after it upstaged...

1 year ago

Published

Nick Higham (1961-2024)
Nick Higham passed away last Saturday. Nick was a close friend of mine and a great friend of MATLAB. I will leave it to...

1 year ago