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Sean de Wolski


MathWorks

5,590 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 define a homogeneous cell array with elements of a fixed size?
Why bother using a cell array v. a 3d array of size [dims1 dims2 N]?

13 days ago | 0

Published


Beer Me!
Sean‘s pick this week is beerme by bheinle7. Have you ever looked at your MATLAB Apps tab and been sad? Even though the...

1 month ago

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Alluvial flow diagram
Jiro‘s Pick this week is Alluvial flow diagram by Alexander Carmeli.I give credit to Yair for bringing this entry to my...

1 month ago

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AIS Decoder
Idin‘s pick this week is AIS Decoder by our former colleague Mike Donovan. This example shows how to decode automatic...

1 month ago

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Answered
How to call external C++ function from Matlab
Starting in 19a, you can call C++ libraries directly in MATLAB: https://www.mathworks.com/help/releases/R2019a/matlab/call-cpp-l...

2 months ago | 1

Answered
How to convert cell array of characters to a datetime array without looping through each cell individually?
Converting the cellstr to a string makes this much easier: cellDates = {' " 8 / 2 4 / 2 0 1 8 8 : 5 9 : 1 8 A M " ';... ...

2 months ago | 1

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Answered
How can I upload files to the App Designer? Can files be uploaded in a web application?
Support for uigetfile() to upload local files to a web app was added in R2018b.

2 months ago | 1

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Memory Info
Sean‘s pick this week is Memory Info by Sviatoslav Danylenko. Have you ever wanted to get the current memory used by MATLAB?...

2 months ago

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Answered
Sending SIMULINK cache files to another folder
In the Simulink Preferences (from home tab>preferences)

2 months ago | 0

Answered
Unhide code in Live Script
Install Update 2 (should appear in upper right hand corner of desktop if online), it fixes this bug.

2 months ago | 0

Published


ThingSpeak functionality ships with R2019a
Jiro‘s Pick this week is ThingSpeak Support Toolbox by MathWorks Internet of Things Team.ThingSpeak is MathWorks’ IoT...

2 months ago

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Answered
Generate searchable documentation for MATLAB Packages(Namespaces) and Classes
I've always exported the html from the autogenerated doc page: doc mypack.myclass Or written a Live Script that documents the ...

2 months ago | 0

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What’s Your Color Scheme?
Brett‘s Pick this week is MATLAB Schemer, by Scott Lowe. Contents Easy manipulation of your MATLAB color scheme! MATLAB is...

2 months ago

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Answered
How to replace arbitrary groups of matrix entries in a vectorized way?
<edited> A simple for-loop will likely be the fastest and most comprehensible way to do this. For-loops are plenty fast in MAT...

2 months ago | 0

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Answered
MATLAB start up option -batch no recognized
The -batch option was added in R2019a.

2 months ago | 1

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Answered
Error using Classificationlearner model in Simulink
Unfortunately this workflow is more painful than it should be. I've found the best set of steps is to: Generate the code for t...

2 months ago | 0

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Answered
timetables stored within a 1x1 cell array within a .mat file
No. Timetable shipped in R2016b; you'll need to upgrade.

3 months ago | 0

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Published


Getting Started with MATLAB examples
Jiro‘s Pick this week is the example files used in the “Getting Started with MATLAB” video by one of my colleagues, Matt...

3 months ago

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Answered
Problem with "datenum" and "datetime" functions
I was able to reproduce this by copying your code from above. It appears the opening ( is bad (right where the arrow is) datet...

3 months ago | 0

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Convert between RGB and Color Names
Will‘s pick this week is Convert between RGB and Color Names by Stephen Cobeldick. A fairly common challenge I encounter is...

3 months ago

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How to show an image using the stored vector (matrix) as a variable in the report generator
You could use: imshow(loadedimage) add(R, Figure()) In general I'd stick with Image even if though requires imwriting your im...

3 months ago | 1

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Answered
Is it possible to organize parfor outputs based on the "thread" number?
parfor ii = 1:10 t = getCurrentTask disp(t.ID) end

3 months ago | 0

Answered
How to make a graph with nodes and edges
What version of MATLAB are you using? graph() was introduced in R2015b

3 months ago | 0

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Answered
turning legend off in xline function
myxline = xline(10,'r',"Hello") myxline.Label = "" myxline.DisplayName = "" Disable the label and/or DisplayName.

3 months ago | 1

Published


MATLAB Projects
Sean‘s pick this week is MATLAB Project File by Dmitry Ratner and the new Projects functionality in base MATLAB added to...

3 months ago

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Answered
How can I average datetimes of my array?
Look at the retime() function for a timetable.

3 months ago | 0

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MATLAB Grader Test (Assessment) Generator
Jiro‘s Pick this week is MATLAB Grader Test Generator by Robin T. Bye.MATLAB Grader is a web service product available for...

3 months ago

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Answered
How to remove artifact (“shadow” causing blurry areas) from 3D CT-data
I'd use a multipass set of global and adaptive thresholds. You can adjust the sensitivities and thresholds as necessary. I = i...

3 months ago | 0

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Do You Find Yourself Searching for Connection (in Simulink)?
Greg’s pick this week is slQuery by Robert Rasche. Robert has created an impressive mechanism for finding and operating on...

4 months ago

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