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Sean de Wolski


MathWorks

5,516 total contributions since 2004

I like to be outside. But if I'm inside, I like to be using MATLAB.

I'm an Application Engineer at MathWorks and civil/structural engineer by education.

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Answered
How to save alphashape image as STL or CAD?
Get the alphaTriangulation from the alphaShape and then call stlwrite (new in 18b) A = alphaShape(rand(10,2)) [T, P] = alphaT...

10 hours ago | 0

Answered
How do I solve this error: Error using matlab.io.datastore.ImageDatastore/readimage (line 32)?
It looks like the datastore (probably imdsTest) only sees 8 images so you can't read the 10th or 15th one.

1 day ago | 0

Answered
findpeaks alternative - help fixing code
How about: islocalmin and islocalmax?

1 day ago | 0

Answered
Rename a bunch of time files
Look at dir() and movefile()

1 day ago | 1

Answered
Analyze75Read and Readanalyze Difference
which -all readanalyze 'readanalyze' not found. I'm guessing this is a 3rd party function. I'd recommend using analyze75rea...

2 days ago | 0

Answered
How to find table column number by column name?
tidx = find(string(T.Properties.VariableNames) == "Temperature")

3 days ago | 1

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Answered
what's the special symbol in a string
erase(tmp, newline)

4 days ago | 0

Answered
How can I remove double quotes from a string?
Use readtable.

4 days ago | 0

Answered
How to insert a n x m matrix or table, into an existing table?
Sounds like data should be a cell array to which you insert 10x5 matrices. replace: data = cell(4,1); And T.data{i} = data; ...

4 days ago | 0

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Answered
Issue with Simulink Model Simulation inside Parfor ?
Have you looked at parsim? It's the new an improved means for simulating in parallel and takes care of the file management that...

4 days ago | 1

Published


Yankee Swap
Sean‘s pick this week is Yankee Swap by Heather Gorr. As the end of the year approaches, many of you will likely be...

7 days ago

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Answered
Modifying inceptionv3 (pre-trained deep learning network)
You can import the layers from the base workspace of MATLAB into the Deep Network Designer and modify it there.

11 days ago | 0

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Answered
How to get 'type' of a variable in matlab?
To get the data type, or class, of a variable, use the “class” function. x = 100; class(x) To determine if a variable has a s...

17 days ago | 4

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Answered
Remove the slprj folder programmatically
What about with the 's' option rmdir('slprj', 's')

23 days ago | 0

Answered
How to import multiple .csv files to MATLAB?
Something along the lines of the following. You can control what you read in by setting datastore properties. ds = datastore('...

24 days ago | 0

Published


Drawing Shear Force, Bending Moment Diagram
Jiro‘s pick this week is Shear Force Bending Moment by Lateef Adewale Kareem.As an ex-mechanical engineer, I remember my...

24 days ago

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Answered
How to Retrieve Files from Lost/Stolen Computer
<https://www.mathworks.com/products/matlab-drive.html>

1 month ago | 0

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Published


WINNER and WINNER II
Idin‘s pick this week is Winner II Channel Model for Communications Toolbox by MathWorks Communications System Toolbox...

1 month ago

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Answered
any workaround for deploying applications allowing users to define custom functions?
If they want it to be customizable, then they need a MATLAB license and you can just give them the source code for the app so ad...

1 month ago | 0

Answered
neural network hyperparameter tuning
This is nowhere near as easy as it should be. The shallow neural net infrastructure is old and uses row-major variables. This ...

1 month ago | 0

Answered
How to unit test with verifyError?
verifyError(testCase, @()add5('c'), 'add5:InputMustBeNumeric') Pass the function handle into verifyError rather than a res...

1 month ago | 1

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Published


Zombie Outbreak
Sean‘s pick this week is Mathematical modelling of an outbreak of zombie infection by E. Cheynet. In honor of Halloween, E....

1 month ago

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Published


Dynamics of Rigid Bodies – Live Editor Challenge Winner (Faculty Category)
Jiro‘s pick this week is The dynamics of rigid bodies system by Anna Sibilska-Mroziewicz.Continuing from my last Pick,...

2 months ago

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‘Custom Syntax for Formatted Strings with %s’\{SPRINTF}
Greg’s pick this week is Nice sprintf syntax using \ (left divide) by Will Fox. A simple entry that exemplifies the...

2 months ago

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Answered
I'm trying to subtract the day from the datetime
dateshift(dt, 'start', 'month') There will still be a day associated with it but it would be standardized on first day of m...

2 months ago | 0

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Published


EDF Read
Sean‘s pick this week is edfRead by Brett Shoelson. EDF Read A MATLAB user asked me yesterday if we have support for the...

2 months ago

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Answered
How get row index of first and last appearance each unique cell element
Unique is your friend: x = ["MUY09KT00" "TW00.00" "MUY09KT00" "TW00.00" "MUY09KT00" "TW00.00" "MHJ09KT00" "P...

2 months ago | 0

Answered
S Function Builder - To implement existing C code
If you're using 18b, consider using the C Caller block: <https://www.mathworks.com/help/releases/R2018b/simulink/ug/integrate...

2 months ago | 1

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Answered
Parsing varargin for a function called with values only instead of name-value pairs
I like name-value pairs because it makes it easier to extend in the future if you need a new option. With the ability to have a...

2 months ago | 0

| accepted

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