0
0
MATLABdata~20 mins

Help system and documentation in MATLAB - Practice Problems & Coding Challenges

Choose your learning style9 modes available
LearnWhyDeepVisualTryChallengeProjectRecallTime
Challenge - 5 Problems
🎖️
MATLAB Help Master
Get all challenges correct to earn this badge!
Test your skills under time pressure!
❓ Predict Output
intermediate
2:00remaining
What is the output of this MATLAB help command?
Consider the following MATLAB command typed in the Command Window:

help plot

What will MATLAB display?
MATLAB
help plot
ADisplays the documentation text describing the 'plot' function usage and examples.
BRuns the 'plot' function with no arguments and shows a blank figure.
CShows an error message: 'Undefined function or variable 'plot''.
DOpens the MATLAB Editor with the source code of 'plot'.
Attempts:
2 left
💡 Hint
The 'help' command shows text documentation for functions.
❓ Predict Output
intermediate
2:00remaining
What does this MATLAB command display?
What is the output of this command?

doc sin

Assume MATLAB is running with GUI.
MATLAB
doc sin
ARuns the sine function on an empty input and returns an empty array.
BOpens the MATLAB Help browser showing detailed documentation for the 'sin' function.
CDisplays an error: 'doc is not recognized'.
DPrints the first 10 values of the sine function in the Command Window.
Attempts:
2 left
💡 Hint
The 'doc' command opens the full documentation in a separate window.
🧠 Conceptual
advanced
2:00remaining
Which statement about MATLAB function documentation is true?
Select the correct statement about how MATLAB function documentation works.
AThe 'doc' command only works for user-defined functions, not built-in ones.
BThe 'help' command executes the function and shows its output as documentation.
CDocumentation comments must be placed at the end of the function file to be recognized.
DThe first contiguous comment block in a function file is shown by the 'help' command.
Attempts:
2 left
💡 Hint
Think about where comments go to be shown by 'help'.
❓ Predict Output
advanced
2:00remaining
What error does this MATLAB command produce?
What error message will this command produce?

help nonExistingFunction
MATLAB
help nonExistingFunction
ANo documentation found for 'nonExistingFunction'.
BDisplays the help text for the closest matching function.
CSyntax error: missing semicolon.
DUndefined function or variable 'nonExistingFunction'.
Attempts:
2 left
💡 Hint
What happens if you ask help for a function that does not exist?
🚀 Application
expert
3:00remaining
How many lines of help text will this function display?
Given this MATLAB function saved as 'myFunc.m':
function y = myFunc(x)
%MYFUNC Multiply input by 2
%   y = myFunc(x) returns x multiplied by 2.
%   This function doubles the input value.

 y = 2 * x;
end

What will be the number of lines displayed when running help myFunc?
MATLAB
function y = myFunc(x)
%MYFUNC Multiply input by 2
%   y = myFunc(x) returns x multiplied by 2.
%   This function doubles the input value.

y = 2 * x;
end
A5 lines
B4 lines
C3 lines
D2 lines
Attempts:
2 left
💡 Hint
Count the contiguous comment lines at the start of the file.