MATLAB Script and Function Creation 3

Question 1

What is the purpose of the `end` keyword at the close of a function definition in MATLAB?

Accepted Answer

It marks the boundary of the function so local functions can follow

Answer

Using `end` to close a function is required when the file contains more than one function, to delineate each function's scope.

Question 2

Which of the following correctly calls a function named `calcArea` with input `5` and captures its output?

Accepted Answer

result = calcArea(5)

Answer

Standard MATLAB function call syntax assigns the returned value using the equals sign.

Question 3

Anonymous functions in MATLAB are created using which syntax?

Accepted Answer

f = @(x) x^2

Answer

The `@(args) expression` syntax defines an anonymous function inline without a separate file.

Question 4

What is the difference between a MATLAB script and a function regarding variable scope?

Accepted Answer

Scripts share the base workspace; functions have their own private workspace

Answer

Functions execute in their own workspace, isolating their variables from the base workspace, while scripts do not.

Question 5

How do you add a persistent variable inside a MATLAB function so it retains its value between calls?

Accepted Answer

persistent varName

Answer

`persistent` declares a variable that retains its value between successive calls to the function.

MATLAB - MATLAB Technical Computing Practice Test