Problem

Generate a melodic contour string matrix
<http://en.wikipedia.org/wiki/Parsons_code Parsons code> is a surprisingly effective way to identify music by its melodic motion...

13 years ago | 5 | 70 solvers

Published

Paul Prints the L-Shaped Membrane
As promised, Paul Kassebaum is back this week with an in-depth discussion of how to get from a mathematical object in...

13 years ago

Solved

Sort (high on middle, low on ends)
Sort the vector of numbers in order low-high-low. Even numbers appear in ascending order on the left and odd numbers appear in d...

13 years ago

Solved

Kurchan Square - Evaluation Function
Evaluate a Kurchan square. An NxN square with values 1:N^2. Given a square matrix determine the products of each row, column,...

13 years ago

Published

Printing Math
What is this shape? Can you guess? It may look like a dirty sock, but I promise that it’s not. Paul Kassebaum, who recently...

13 years ago

Solved

Criss-Cross Verification: NHL
This Challenge is to verify a Criss-Cross matrix has no invalid words,contains all of the word set, and all are simply connected...

13 years ago

Published

Recap of the UK Student Robot Challenge
Robot competitions are in the air these days, what with the recent Battlebots competition in Massachusetts and the earlier...

13 years ago

Answered
regular expressions resources and regular expression problem
Another way to get good at regular expressions is to practice on Cody with <http://www.mathworks.com/matlabcentral/cody/?term=ta...

13 years ago | 1

Published

Data Tips on MATLAB Mobile
It has been a while since we last talked about displaying data tips on MATLAB Mobile. The data cursor feature has since...

13 years ago

Problem

Beads on a Necklace (Convex Hulls)
We may describe a <http://en.wikipedia.org/wiki/Convex_hull convex hull> as a rubber band stretched around a list of points. Som...

13 years ago | 2 | 58 solvers

Solved

Is it an Armstrong number?
An Armstrong number of three digits is an integer such that the sum of the cubes of its digits is equal to the number itself. Fo...

13 years ago

Published

Design Challenge: Autonomous Battlebots with Simulink
This week I welcome Dr. Paul Kassebaum to the blog. Paul is a physicist at MathWorks working to engage the public with...

13 years ago

Problem

Prime Ladders
A <http://en.wikipedia.org/wiki/Word_ladder word ladder> transforms one word to another by means of single-letter mutations. So ...

13 years ago | 10 | 60 solvers

Published

Fun, learning, and drama at the MathWorks Student Robot Challenge
This week I’d like to introduce guest blogger Dr Tanya Morton. Tanya leads the Application Engineering team in the UK,...

13 years ago

Published

Challenge students with MATLAB practice on Cody
I’ve recently been talking with professors eager to use Cody in the classroom.  From these discussions, I’ve learned...

13 years ago

Published

Dancing in the spotlight – The intersection between robotics, video processing and art
This week I’d like to introduce guest blogger Joachim Schlosser. Joachim leads the team of Education Technical Specialists...

13 years ago

Published

Your MATLAB Files on the Cloud. And more.
Happy 2013! 2012 was an eventful year for MATLAB Mobile, with releases for the iPad, the Android platform, and several...

13 years ago

Problem

Balanced Ternary Numbers: Easy as |, |-, |o
This problem concerns the so-called <http://en.wikipedia.org/wiki/Balanced_ternary balanced ternary> system for representing num...

13 years ago | 3 | 85 solvers

Problem

MatCAT - Reconstruct X from Its X-rays
Consider a matrix x x = [ 1 2 0 0 5 0 3 0 8 ] If we sum x along the rows we get row_sums = [3 5 11] ...

13 years ago | 10 | 152 solvers

Solved

THE CALCULATOR OF LOVE
In honor of Valentine's Day, program a love calculator that figures out the percentage of compatibility between two people using...

13 years ago

Published

Visualizing Cody
Because of the amount of traffic that it gets, Cody generates a tremendous amount of interesting data every day. Most of it...

13 years ago

Published

Giving by Taking: File Exchange Acknowledgment Trees
One of the virtues of a good programmer (as observed by Larry Wall) is laziness. Don’t write code that you don’t have to!...

13 years ago

Solved

Sum the Digits of a Number
Given an integer, sum the digits repeatedly until you end up with a single value less than 10. For example, if you add the di...

13 years ago

Solved

Replace multiples of 5 with NaN
It is required to replace all values in a vector that are multiples of 5 with NaN. Example: input: x = [1 2 5 12 10 7] ...

13 years ago

Solved

Insert zeros into vector
Insert zeros after each elements in the vector. Number of zeros is specified as the input parameter. For example: x = [1 ...

13 years ago

Published

Football Squares with MATLAB
h1 { font-size:18pt; } h2.titlebg { font-size:13pt; } h3 { color:#4A4F55; padding:0px; margin:5px 0px 5px;...

13 years ago

Solved

Happy 2013...
Happy 2013, everyone! An interesting tidbit about 2013 is that it is the first year since 1987 to contain four different digits...

13 years ago

Problem

Eliminate Polysyllabics: Long live short words!
Given a string s1, return s2 in which all the words with more than one syllable have been removed. To make things simple, we ...

13 years ago | 4 | 157 solvers

Published

MATLAB Christmas Trees
While online doing some last minute shopping, I found some Christmas trees that were created using MATLAB.  I...

13 years ago

Problem

Property dispute!
Two neighbors have rectangular plots of land A and B. The surveyors give you the coordinates of each. If they overlap, there is ...

13 years ago | 3 | 42 solvers