Sean de Wolski

MathWorks

5.636 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.

Sean de Wolski's Badges

Answered
Unable to save 1024 x 1280 cell array of cfit objects.
If I were you, I'd just store a,b,c,and d, as matrices directly then when necessary construct the cfit object on the fly with th...

5 Tage ago | 0

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Answered
How can I switch programatically that my model uses base workspace instead of data dicitonary?
I think you just set "DataDictionary" to {''}. https://www.mathworks.com/help/releases/R2019b/simulink/slref/model-parameters....

5 Tage ago | 0

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Answered
How to detect start points and end points of plateaus in graph plotted from a data set?
Maybe look at ischange or the change point detection live task in 19b? https://www.mathworks.com/help/matlab/ref/findchangepo...

6 Tage ago | 0

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how to make a heatmap for a monthly time serie?
Convert your x values to datetime. Then heatmap will just work: dt = datetime('now'):hours(1):datetime('tomorrow'); v = rand(...

6 Tage ago | 1

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Is there an easy way to build a test suite from all tests in a folder containing multiple packages?
Have you considered adopting projects? I'd recommend it (for most things and especially for this use case) then you can just cr...

7 Tage ago | 0

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How do i create a prototype pulse using zeros and ones?
This ought to do part 1: pulse = rem(ones(1,14).*(1:14),13)+zeros(1,14)>2

7 Tage ago | 0

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First Col to Rep Date in Double Array
Use a timetable and stackedplot.

7 Tage ago | 0

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Question: How to Read multiple CSV tables?
ds = datastore('sess*') % Manipulate properties of datastore as necessary (variable names, types, selected) T = readall(ds)

7 Tage ago | 1

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Define start and end dates when selecting from file
Look at creating a timetable and then using timerange to index into it. doc timetable doc timerange

7 Tage ago | 0

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date into double then back to date in loop
You should really look at creating a datetime and using its various properties and methods instead of datenum or datestr. Can y...

14 Tage ago | 0

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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...

28 Tage ago | 0

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

28 Tage 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...

28 Tage ago | 1

Published

Animating mathematical functions
Jiro‘s Pick this week is Plot Gui 2d by Silas Henderson.This entry is one of many interactive apps that Silas has created,...

29 Tage ago

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...

etwa ein Monat ago | 0

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Published

Execute My MATLAB Algorithm in a Web Application
Greg’s pick this week is Generate JavaScript Using MATLAB Coder by Geoff McVittie. You are building a game where you want...

etwa ein Monat ago

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)

etwa ein Monat ago | 0

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

etwa ein Monat ago | 0

Published

Minimal Bounding Box
Sean‘s pick this week is Minimal Bounding Box by Johannes Korsawe. I was recently asked by a customer “How can I replicate...

etwa 2 Monate ago

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

etwa 2 Monate ago | 1

Published

Spider plots and more argument validation
Jiro‘s Pick this week is spider_plot by Moses.There are quite a few “spider plots” on the File Exchange, but this one by...

etwa 2 Monate ago

Published

Programmatically adding data tips
Richard is Consulting Engineer at MathWorks focused on the Embedded Coder product for code generation, primarily in the...

etwa 2 Monate ago

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,...

2 Monate ago

Published

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 Monate ago

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....

3 Monate 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(...

3 Monate 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 = ...

3 Monate ago | 2

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Published

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

3 Monate ago

Published

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...

3 Monate ago

Published

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 Monate ago