Stuart’s MATLAB Videos

Watch and Learn

Posts 1 - 10 of 78

結果: 2008

MATLAB example: Don’t reinvent the thermometer

My last post talked about finding MATLAB code from other people so that you do not have to reinvent it yourself. Eric, the author of the code I modified, challenged me to create “a new Matlab… 続きを読む >>

MATLAB example: Don’t reinvent the wheel 1

I love a good visualization of data, and often cringe when I see data in a table that would be much more effective as a graph. As with many people in Boston today, I am trying to decide what to do… 続きを読む >>

Puzzler: Intermediate sums 6

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 >>

Video Tutorial: Using visualization to debug 3

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 >>

Video tutorial: 3d indexing 4

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 >>

Video tutorial: Verbal code review

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 >>

Video tutorial: Tolerances in comparisons 4

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 >>

Video tutorial: Infinite series 3

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 >>

Video tutorial: Debugging a logical indexing problem 4

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 >>

Contest: Final wrap up 2

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 >>

Posts 1 - 10 of 78