Original subtitles

Hello, this tutorial is designed to introduce students to MATLAB Online and

its use in solving the programming assignments for this course.

The goal of these assignments is to help in visualizing the key concepts

taught in this course.

Let's get started.

The first thing that we observe is a problem description,

where details regarding the assignment and its requirements are mentioned.

This section often contains links to download files for your desktop MATLAB.

We recommend using the desktop version frequently when building your solutions,

as it helps to inspect your variables and develop your code.

For function problems, there are two code boxes.

The first code box is where you implement the constants for the assignment and

it'll often contain some code to get you started.

The second code box is for testing.

This box will consist of some code to test your function, but

can be modified to test for different scenarios.

The Run Function button runs the code to call your function box and

displays any output there.

The Submit button tests your function and returns the result.

Let's see how this works.

In this example, we are going to create a location matrix above the z-axis for

a given angle in radians,

which is given by the equation in the problem description.

So our task is to create a matrix according to the formula shown.

Let's go ahead and plug in the formula.

Now that I think my function is done,

let's use the Run Function button to test if my function works as expected.

Always test a function before pressing Submit to make sure there

aren't any syntactical errors.

Great, our function runs and we see the rotated vector.

Remember, we can modify this code to test the function multiple times.

Let's go ahead and change the vector and run this code again.

Now that we think our function's correct, let's hit Submit.

Oops, looks like we made a mistake.

Notice the two levels of feedback.

The feedback in red directly is from creating code.

The feedback in brown is a additional set of hints provided regarding possible

errors.

So in this case, I have the error because of negative sine.

Let me update the code and try again.

Great, now we have all green checks,

implying we have successfully passed the problem.

Don't worry if you get stuck.

Code rarely works the first time and

the problems in this course are quite challenging.

So pat yourselves on the back when you get them right.

When you want to get help in the forum,s include three things in your post.

The assessment descriptions that failed or that you have questions on.

The red error message returned.

Now this can vary from the type of error, description of error probed or

pseudocode outlined in your approach.

Please do not post any actual code in the forums even if it is not working.

Thank you.