Sean de Wolski

MathWorks

5,804 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
How do you add a header to a printed figure?
You can use the MATLAB Report Generator to build sophisticated reports with whatever formatting, chapters, sections, etc. you ne...

5 hours ago | 0

Answered
How to shift all the non-zero elements of a matrix to the right of the matrix?
Without loop or cells: x = [1 2 3 0 0 1 2 0 0 0 1 2 3 0 0 0 1 0 0 1 2 3 1 2]; xt = x.'; sxr = sort(logical(xt), 1, ...

9 days ago | 2

Answered
Trouble with jsondecode() and jsonencode()
fprintf(fid,"%s",str2) That way if there are format spec characters in the JSON they are not interpretted as such.

11 days ago | 1

Answered
How can I create a standalone application using my model from Regression Learner?
You need to get the data into the compiled app. Typically with compiling to an executable this would be by passing in a file na...

12 days ago | 0

Published

Satellite Trajectory
Will's pick this week is Satellite Trajectory by Huy Nguyen. This submission provides an app that you can install and add...

14 days ago

Answered
TiledLayout fill with for loops
f = figure; t = tiledlayout(f,5,3); for ii = 1:15 nexttile(t) plot(sin(1:(ii*10))) end

17 days ago | 0

Answered
Is it possible to vectorize this?
A = [1 2 0 3 4 6; 9 3 4 0 9 5; 4 3 0 5 6 7; 3 7 7 3 0 0;1 1 8 8 4 8; 0 0 0 0 4 2; 0 0 0 0 0 0] B = accumarray(repmat((1:height(...

17 days ago | 2

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Answered
How to add graph in the template used for report generation
The plot can go into any block hole you have in the template. You can use mlreportgen.dom.Image or mlreportgen.report.Figure to...

17 days ago | 2

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Answered
What MATLAB functions are underappreciated?
onCleanup - I want to reliably do this thing at the end... I've actually gotten to the point that I will pass these (or cell ar...

22 days ago | 1

Answered
What MATLAB functions are underappreciated?
tempname/tempdir - Need to write something and guarantee write permissions on any platform...

22 days ago | 0

Answered
What MATLAB functions are underappreciated?
mfilename I use this all of the time for building relative file or folder paths. I want currentProject().RootFolder to replace ...

22 days ago | 0

Answered
How to reshape a dataset?
Convert the dataset to the much more modern and supported table using dataset2table. Look at unstack()

23 days ago | 0

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Answered
datenum resulting in incorrect values
Please use datetime instead of datenum. If you have an excel date, you can convert directly from that d = datetime(x, 'Convert...

1 month ago | 1

Answered
How to correctly use MONTHS function?
You should use datetimes, durations and the between function for this: >> d1 = datetime('may 31 2000', 'InputFormat', 'MMM dd y...

1 month ago | 0

Answered
How to convert arc length to km?
Arc length from the distance function is the distance. It will be in units of the ellipsoid or the value of the fifth input arg...

1 month ago | 0

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Answered
How to add set/get methods methods in class constructor
You want dependent properties: Set and Get Methods for Dependent Properties - MATLAB & Simulink (mathworks.com)

1 month ago | 0

Answered
Finding threshold value with Otsu Method
doc graythresh

1 month ago | 0

Answered
Will newer versions of the MATLAB Compiler Runtime work on older versions of MATLAB?
No. The runtime needs to match the version of MATLAB it was compiled with.

1 month ago | 0

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Published

Get the Ship Stuck!
In this blog post, I want to get the Ever Given cargo ship stuck in the pond next to MathWorks at scale. This blog post is...

1 month ago

Answered
randsrc() in SimEvents simulink
Put this before it: coder.extrinsic('randsrc')

2 months ago | 1

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Published

Animation Playback Controls in Live Scripts (R2021a)
Jiro's Pick this week is MATLAB Plot Gallery - Animation by MathWorks Plot Gallery Team.I chose this animation example to...

2 months ago

Answered
array2table won't accept variable name input
Support for invalid variable names was added recently so you're probably on an older release that required >>isvarname(varname) ...

2 months ago | 0

Answered
System command calls different version of gdal
Can you provide the full path to the gdal executable? system('<gdalroot>/gdalinfo --version');

2 months ago | 0

Answered
How to turn off the JIT compiler in MATLAB R2020b?
No. All MATLAB code is JIT compiled in releases 15b and later.

2 months ago | 0

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Answered
Generating enlarged figure for Report.
https://www.mathworks.com/help/releases/R2020b/matlab/ref/matlab.ui.figure-properties.html#d122e384507 Look at the paper posi...

2 months ago | 0

Published

The Matrix Lab Has You
Sean's pick this week is The Matrix lab has you by Mathworlds. I discovered this after reading...

3 months ago

Published

File Exchange Categories for your Valentine
Jiro's Pick this week is 2-axis CNC ILC cutting machine by Bartlomiej Ufnalski. This example is about a particular type...

3 months ago

Answered
How to calculate hourly average value for measured Temperature, CO2, RH and Rid in 5 minutes interval
Read it in as a timetable readtimetable then call retime which does exactly what you want. t = readtimetable('yourfile') fivem...

3 months ago | 0

Answered
Motor control toolbox license
It doesn't look like it's avaiable - MATLAB Home - MATLAB & Simulink (mathworks.com) Click the see available products button. I...

3 months ago | 0

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Published

Tracing the boundary of a binary region in an image
Brett's Pick this week is Freeman chain code, by Nicolas Douillet.ContentsA new file prompts a thought experimentFreeman...

3 months ago