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Always!
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It depends
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Never!
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I didn't know that was possible
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quick / easy
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themed / in a group
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challenge (e.g., banned functions)
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puzzle / game
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educational
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other (comment below)
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isstring
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ischar
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iscellstr
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isletter
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isspace
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ispunctuation
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Don't use / What are Projects?
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1–10
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11–20
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21–30
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31–50
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51+ (comment below)
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2
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6
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Other (comment below)
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numel(v)
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length(v)
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width(v)
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nnz(v)
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size(v, 1)
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sum(v > 0)
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ismissing( { [ ] } )
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ismissing( NaN )
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ismissing( NaT )
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ismissing( missing )
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ismissing( categorical(missing) )
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ismissing( { '' } ) % 2 apostrophes
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isempty( [ ] )
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isempty( { } )
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isempty( '' ) % 2 single quotes
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isempty( "" ) % 2 double quotes
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c = categorical( [ ] ); isempty(c)
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s = struct("a", [ ] ); isempty(s.a)
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sort(v)
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unique(v)
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union(v, [ ])
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intersect(v, v)
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setdiff(v, [ ])
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All return sorted output
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s = ['M','A','T','L','A','B']
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char([77,65,84,76,65,66])
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"MAT" + "LAB"
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upper(char('matlab' - '0' + 48))
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fliplr("BALTAM")
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rot90(rot90('BALTAM'))
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eye(3) - diag(ones(1,3))
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0 ./ ones(3)
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cos(repmat(pi/2, [3,3]))
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zeros(3)
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A(3, 3) = 0
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mtimes([1;1;0], [0,0,0])
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goc3
goc3
Last activity am 6 Nov. 2023

Have you ever learned that something you were doing manually in MATLAB was already possible using a built-in feature? Have you ever written a function only to later realize (or be told) that a built-in function already did what you needed?
Two such moments come to mind for me.
1. Did you realize that you can set conditional breakpoints? Neither did I, until someone showed me that feature. To do that, open or create a file in the editor, right click on a line number for any line that contains code, and select Set Conditional Breakpoint... This will bring up a dialog wherein you can type any logical condition for which execution should be paused. Before I learned about this, I would manually insert if-statements during debugging. Then, after fixing each bug, I would have to delete those statements. This built-in feature is so much better.
2. Have you ever needed to plot horizontal or vertical lines in a plot? For the longest time, I would manually code such lines. Then, I learned about xline() and yline(). Not only is less code required, these lines automatically span the entire axes while zooming, panning, or adjusting axis limits!
Share your own Aha! moments below. This will help everyone learn about MATLAB functionality that may not be obvious or front and center.
(Note: While File Exchange contains many great contributions, the intent of this thread is to focus on built-in MATLAB functionality.)
1
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2
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3
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6+
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<= 6 GB
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7–12 GB
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13–22 GB
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23–46 GB
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47–90 GB
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>= 91 GB
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Yes, the available tools are great
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Yes, the available tools need help
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No, but I would like to
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No, it is not important to me
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What is test-driven development?
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1955 Stimmen
Always
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Sometimes
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In the past, but not now
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Never
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What is Simulink Project?
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Always
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Sometimes
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In the past, but not now
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Never
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What is MATLAB Project?
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A bunch of quick, simple problems
16%
A structured, educational set
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Brain-teasers
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Random miscellany
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Something else
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What are Problem Groups?
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1777 Stimmen
goc3
goc3
Last activity am 6 Apr. 2020

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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