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Sean de Wolski


MathWorks

5,621 total contributions since 2004

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

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

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Answered
How can I insert an image into MATLAB App Designer?
Yes, uiimage was added in a newer release, R2019a. Upgrading should be your best option but if it's not, you can add an axes an...

2 days ago | 0

| accepted

Answered
How to check MATLAB version and choose compatible functions?
Check out verLessThan.

2 days ago | 1

Answered
Undefined function or variable 'profile' in standalone application
It's not supported. What profile information do you want in your deployed application? https://www.mathworks.com/help/compiler...

2 days ago | 1

Answered
Find the number after a string
Something like this: s = string(fileread(your_file)) val = extractBetween(s, "Einstein A Coefficient (1/sec) :", newline) dou...

9 days ago | 0

| accepted

Answered
How can we draw a customizable rectangular ROI on an axes using AppDesigner?
In 19b, this works on a uiaxes as well. drawrectangle(uiaxes)

14 days ago | 0

Answered
Standalone app output to windows cmd?
Call the app from the Windows Command line rather than from double-clicking the icon.

16 days ago | 0

Answered
Extracting values from file names to array
fn = ["file_234.txt" "file_356.txt" "file_567.txt" "file_987.txt"] double(extractBetween(fn, "_", "."))

22 days ago | 1

Published


Leaf Pile!
Sean‘s pick this week is leafpile by Nathaniel Barlow. As we’re finally starting to see cooler temperatures in New England,...

1 month ago

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New with R2019b – Function Argument Validation
Jiro‘s Pick this week is Function Argument Validation, which is a new R2019b feature that I’m really excited about.If...

2 months ago

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Answered
MATLAB crash and i dont know why
You should send the report when this happens. It will create a tech support case for you if the workaround isn't already known....

2 months ago | 0

Answered
How to delete default excel sheets when using writetable function (mac)?
Starting in R2019b, specifying the sheet will cause "Sheet"+(1:3) to not be created. This is a new feature of 19b. writetable(...

2 months ago | 1

Answered
Add timetable with many months to another timetable with few months
Look at synchronize it does exactly this: tt = timetable(dateshift(datetime,'start','day'), 42, 'VariableNames',"Cars") tt2 = ...

2 months ago | 2

| accepted

Published


Tiled Layout
Sean‘s pick this week is tiledlayout by MathWorks’s development team. R2019b shipped on September 12th and is now available...

2 months ago

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Winner of Machine Learning Hackathon
Jiro‘s Pick this week is Deep Learning Hackathon with Transfer Learning by Paola Jaramillo.Deep learning is becoming more...

2 months ago

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How Old Do I Look?
Brett‘s Pick this week is Age and Gender Estimation from Face, by Masayuki Tanaka. Back in 2014, I “co-selected” one of...

3 months ago

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Answered
Is it possible to change PATH temporarily?
You really should look into using actual "Projects" in R2019a. They do exactly what you want. https://www.mathworks.com/help/r...

3 months ago | 0

| accepted

Answered
Duplicate points evaluated in Bayesian Optimization
You may want to look at the memoize function to cache the initial call so subsequent ones can just use the cached value. https:...

3 months ago | 0

Published


Polygon2Voxel
Sean‘s pick this week is polygon2voxel by Dirk-Jan Kroon. I was recently asked: “How can you find the intersecting volume...

3 months ago

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Answered
How to Compile an Application with the "pspectrum" function?
The signalAnalyzer app is not compilable. You shouldn't have to do anything to compile pspectrum, it should just work. Do you ...

3 months ago | 0

Answered
Findpeaks - excluding peaks within certain x axis values
findpeaks(y(x>10)) ?

3 months ago | 1

| accepted

Answered
SimEvent entity life time for total cycletime calculation
Pull in the Simulink Sources / Clock Block as an input to stamp an entity with the clock time at initialization and termination....

3 months ago | 0

Answered
Reducing jagged appearance of head CT mesh
Look at using smooth3 on the volume first before calling isosurface().

3 months ago | 0

| accepted

Published


Maze
Will‘s pick this week is Maze by Rodney Meyer. This simple submission is surprisingly effective at providing hours of...

3 months ago

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Answered
Add Customized Elements in Component Library in Matlab App Designer
You should strongly consider using SimEvents for this.

3 months ago | 1

Answered
drawfreehand in App Designer ?
It's kind of silently supported but you can programmatically (>=R2018b) add an axes to a uifigure and then draw* will work. ax ...

3 months ago | 2

Answered
Find non unique string in a table
n = groupcounts(T.Alpha) [~, last] = unique(T.Alpha, 'last') T.Ticket(last(n>1)) Using the "new and shiny" groupcounts.

3 months ago | 1

Published


When was the function introduced?
Jiro‘s Pick this week is when by Reza Ahmadzadeh.Working at MathWorks, I have become spoiled and have become used to...

4 months ago

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Answered
Get a property from a class
You can set the SetAccess attribute of the properties block including it to make it read-only. No reason to deal with get(), ac...

4 months ago | 0

| accepted

Published


Generate Code for All the Things?
Greg’s pick this week is A short introduction on using model based design approach in Embedded System by TAB. Imagine a...

4 months ago

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Struct2Vars
Sean‘s pick this week is struct2vars by Matthew Eicholtz. I was recently asked by a colleague: “How do I get all of the...

4 months ago

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