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goc3
Last activity 2024년 10월 21일

Do you have the tab key insert spaces instead of tabs?

Always!

29%

It depends

14%

Never!

21%

I didn't know that was possible

36%

My favorite type of Cody problem is:

quick / easy

21%

themed / in a group

20%

challenge (e.g., banned functions)

13%

puzzle / game

16%

educational

28%

other (comment below)

Which of the following is not a built-in string-checking function?

isstring

11%

ischar

iscellstr

13%

isletter

21%

isspace

ispunctuation

37%

How many code files are typically in your MATLAB Projects (scripts, functions, classes, tests)?

Don't use / What are Projects?

26%

1–10

31%

11–20

15%

21–30

31–50

51+ (comment below)

12%

How many spaces per tab do you prefer?

17%

12%

59%

Other (comment below)

Which of the following does not return the correct length (5) of v = [6,2,9,7,3]?

numel(v)

length(v)

13%

width(v)

14%

nnz(v)

size(v, 1)

27%

sum(v > 0)

31%

Which of the following is not really a missing value? (Or, which option is false?)

ismissing( { [ ] } )

26%

ismissing( NaN )

18%

ismissing( NaT )

11%

ismissing( missing )

21%

ismissing( categorical(missing) )

ismissing( { '' } ) % 2 apostrophes

16%

Which of the following produces a false value?

isempty( [ ] )

10%

isempty( { } )

13%

isempty( '' ) % 2 single quotes

13%

isempty( "" ) % 2 double quotes

24%

c = categorical( [ ] ); isempty(c)

18%

s = struct("a", [ ] ); isempty(s.a)

22%

Which does NOT return sorted output for a vector of unique values (e.g., v = [3,7,2,5,1])?

sort(v)

unique(v)

16%

union(v, [ ])

17%

intersect(v, v)

14%

setdiff(v, [ ])

12%

All return sorted output

33%

Which of the following will not result in MATLAB as the output? (It may be a string or char. array.)

s = ['M','A','T','L','A','B']

char([77,65,84,76,65,66])

"MAT" + "LAB"

21%

upper(char('matlab' - '0' + 48))

17%

fliplr("BALTAM")

17%

rot90(rot90('BALTAM'))

30%

Which of the following will not produce a 3x3 array of zeros in MATLAB?

eye(3) - diag(ones(1,3))

11%

0 ./ ones(3)

cos(repmat(pi/2, [3,3]))

16%

zeros(3)

20%

A(3, 3) = 0

32%

mtimes([1;1;0], [0,0,0])

12%

I use MATLAB on x setups. (work, home; laptop, tablet; local installation, online; etc.)

33%

34%

18%

On the main computer you use for MATLAB, how much RAM is installed?

<= 6 GB

10%

7–12 GB

26%

13–22 GB

34%

23–46 GB

19%

47–90 GB

>= 91 GB

Do you use test-driven development in MATLAB?

Yes, the available tools are great

12%

Yes, the available tools need help

No, but I would like to

14%

No, it is not important to me

What is test-driven development?

61%

For your Simulink work, do you use Projects (.prj files)?

Always

12%

Sometimes

11%

In the past, but not now

Never

20%

What is Simulink Project?

53%

For your MATLAB work, do you use Projects (.prj files)?

Always

Sometimes

In the past, but not now

Never

23%

What is MATLAB Project?

58%

What is your favorite type of Cody Problem Group?

A bunch of quick, simple problems

16%

A structured, educational set

15%

Brain-teasers

16%

Random miscellany

Something else

What are Problem Groups?

49%

Cody - Draw Letters

Cody has a wealth of problem groups that allow users of various skill levels to improve programming skills vis-à-vis MATLAB in an engaging way.

I would like to highlight the Draw Letters group, composed of problems created by Majid Farzaneh.

If you haven't yet visited Cody or solved that problem group, I would recommend that you head over there now. What are you waiting for?

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