Stuart’s MATLAB Videos

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Posts 421 - 430 of 549

Using parent child relationships to find figures 6

This was a question that came across my desk recently: “How do I know what figure numbers are already open?” The way to answer this is to query the “root” (always handle… read more >>

Puzzler: optimize this 17

Often when I post code, there is a discussion of how to optimize it. I tend to subscribe to this maxim:

Rules of Optimization:
Rule 1: Don’t do it.
Rule 2 (for experts only): Don’t do… read more >>

Debugging session 3

clear num = [1 1 1 1 1 1 1]; den = [1 2 3 0 5 6 7]; for i = 1: numel(den) if den(i) == 0 a = 1 else … read more >>

Exploring uitable properties 12

I got a question via e-mail that was asking how to set the data in a uitable. Setting the data in a uitable is as easy as: >> a = uitable >> set(a,’data’,… read more >>

Breaking up compound statements for the profiler 4

A statement like this: a = sin(x) + cos(y) + inv(z); makes it impossible to know which part of the calculation is the bottleneck. This video shows how to determine what is slowing your code… read more >>

Flow chart shows which visualization to use 5

Nathan over at FlowingData.com had a post that explains what visualization to use in different situations. Ultimately he linked to this chart from Andrew Abela of The Extreme Presentation(tm)… read more >>

Binning data in MATLAB 23

I have been reading the MATLAB questions in Stack Overflow for a few weeks, and here was a really good question that came through. With two vectors, x and y, bin the x values as if with a… read more >>

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… read more >>

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… read more >>

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… read more >>

Posts 421 - 430 of 549

These postings are the author's and don't necessarily represent the opinions of MathWorks.