This is a quick technique that came out of the series we have been doing about the cryptography algorithm. If you have NaN (“Not A Number”) in your data, MATLAB will ignore them in a… 続きを読む >>
Today we will look further at the cypher algorithm, specifically the randomness of this algorithm. There are two different distributions to look at: distribution of single numbers (1,2,3,4) and the… 続きを読む >>
This video is more philosophical than about MATLAB syntax. When trying to understand the cycles that occur in the output of a pseudo random number generator, I first approached the problem in… 続きを読む >>
This next video shows how to think about the results from the profiler to speed up your MATLAB code. We do not spend much time on the actual optimization, but more on finding bottlenecks and… 続きを読む >>
This video is about how to debug in MATLAB. This video shows an error that occurs only now and then when using random inputs. A technique for capturing the random inputs, using dBSTOP IF ERROR, the… 続きを読む >>
This video assumes you have watched this video that outlines a simple encryption algorithm. The video shows a quick code review of my algorithm. Warning: this video is part of a longer series, I… 続きを読む >>
I have liked cryptography since I was sending Caesar cipher messages to my fellow 6th graders. The essence of that was to ‘add’ a value to each letter of your message. With Caesar, it… 続きを読む >>
This video shows how to put an individual text label on each of a series of points. This video also shows a simple technique for understanding lines of code where there are many functions… 続きを読む >>
I teach the introduction to MATLAB classes for all new hires in the Technical Support group at MathWorks. One of the attendees wanted to know how to do a moving average in MATLAB. This can be… 続きを読む >>
It is very common to read through all the values in an Excel spreadsheet to process them in MATLAB. Here is a simple example of importing Excel in MATLAB and looping through the values. if… 続きを読む >>