MATLAB challenges get thrown around the halls of The MathWorks with fair regularity. I thought this most recent one would make a good puzzler.
You have a matrix that has 3xN rows and you want to… 続きを読む >>

6:29

A question came up on the MATLAB newsgroup about debugging a sorting algorithm. I thought this was an excellent opportunity to show how visualization of intermediate results would help to determine… 続きを読む >>

2:50

The MATLAB user has this: clear clc M(:,:,1) = [1,2;3,4]; M(:,:,2) = [21,22;23,24]; J = [1,2; 2,1]; They want this: ans = [1 22 23 4] They tried this: D = M(:,:,J) % This doesn’t… 続きを読む >>

3:53

Talking through your code is an excellent way to find bugs. By discussing the code you have written line by line, you are forced to understand it better. This is a common practice at most software… 続きを読む >>

2:23

Sometimes you will do a calculation where the answer looks like ‘0’ or ‘1’ or some other number like that. The natural thing to do is to do a test like this: if (answer ==… 続きを読む >>

3:37

In this short video, I explore the math behind this joke: An infinite number of mathematicians walk into a bar. The 1st orders a 1 beer. The 2nd orders 1/2 a beer. The 3rd orders … 続きを読む >>

4:48

I love getting well formed question and challenges from fellow MATLAB users. This week I got one that works very well as a video. The problem was trying to index into a vector with a vector of… 続きを読む >>

Well, it was a great contest this season. I was very happy to see that each King of the Hill tended to get arguably better than the prior. I wanted to find out how much better, so I used the actual… 続きを読む >>

6:08

I have been waiting until the daylight portion of the ArmyAnts contest to post this commentary. Jan has done an excellent job with his algorithm. He made only one entry in that time period, and he… 続きを読む >>

I love the MATLAB contest, I am not sure if it is more fun to play the contest or to help design and administer it. Either way, I am looking forward to seeing a lot of really great algorithms from… 続きを読む >>