Meeting 25:

Here we implement cos(2πft) where f is the frequency of the sinusoid (note that in CW 10, by using cos(t) the frequency was 1/(2π)), so the time series as generated by the For Loop need to be multiplied by 2πf before the function of cos is evaluated with the Eval-Single-Var. Array.

Notice that in class we used the Waveform graphs instead of the XY graphs as in this illustration, here we just need to bundle the X and Y series for the graphs.

Logbook

Just to remind that the logbook is a very important component of the course and will be evaluated, together with the final exam they count 20% of the course grade.

You should record the logbook on a daily basis, with pages numbered and dated, about two main topics:

-Discussions and findings about projects, collectively or individually

-Answers to questions posted here in the class notes and other learning conclusions you found by doing activities related to this course.

The next logbook due date is Engin 103 Final Exam in May 2006.

Logbook questions:

1- what is the period of a sinusoid or a periodic signal? How to get the period from the frequency?

2- Why did we use two Eval.-Single-Var. Array and not three (there are three graphs)? How did you get the third signal?

3- By just looking at the combined signal, can you determine how many sinusoids it is composed of? Explain how.