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Sean de Wolski


MathWorks

5.576 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
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 ...

1 dag ago | 0

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...

7 dagen ago | 0

| accepted

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

9 dagen ago | 1

| accepted

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...

13 dagen ago | 0

| accepted

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

15 dagen ago | 0

| accepted

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...

23 dagen ago | 0

| accepted

Published


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...

26 dagen 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...

28 dagen ago | 1

| accepted

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

30 dagen ago | 0

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

ongeveer een maand ago | 0

| accepted

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

ongeveer een maand 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...

ongeveer een maand ago

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

ongeveer een maand ago | 0

| accepted

Published


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...

ongeveer een maand 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...

ongeveer een maand ago | 0

Published


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...

ongeveer 2 maanden ago

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Answered
How to replace MATLABPOOL to PARPOOL ?
p = gcp; p.NumWorkers Will tell you the number of workers in the pool rather than matlabpool('size')

ongeveer 2 maanden ago | 0

| accepted

Answered
MAPPING TOOLBOX LAT/LON vectors are not strictly monotonically increasing, hence zi = interp2(LON,LAT,GAIN,loni,lati) ; gives me errors
Look at geointerp which properly projects lat/lon onto a plane so the interpolation values make sense.

ongeveer 2 maanden ago | 0

Published


Connectionist Temporal Classification Layer
Sean‘s pick this week is Connectionist Temporal Classification Layer by SergeyLA. A Custom Deep Learning Layer in the...

ongeveer 2 maanden ago

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Answered
Deep Q-learning
https://www.mathworks.com/help/releases/R2019a/reinforcement-learning/ug/q-agents.html

ongeveer 2 maanden ago | 1

Answered
How to access itemprop = "name" from within a data structure in HTML code using Matlab?
Using htmlTree, this is trivial: tree = htmlTree(fileread('yourfile.html')) div = tree.findElement('div') item = div.getAtt...

ongeveer 2 maanden ago | 0

Answered
Classdef get methods: allowing get indexing into an array of length either (1x1) or (Nx1).
You could GetAccess Protect the A property and then use a method instead of straight property reference. methods function a ...

ongeveer 2 maanden ago | 0

Published


Multi-column legend, revisited
Jiro‘s Pick this week is the NumColumns property of the legend function, new as of R2018a.This week, R2019a was...

2 maanden ago

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Answered
Given an instance of a class (without knowing class name), how to call the constructor?
Might you be interested in inheriting from matlab.mixin.Copyable which gives you a copy method?

2 maanden ago | 0

| accepted

Answered
AlphaShape: incorrect geometry
How about pointlocation?

2 maanden ago | 0

| accepted

Answered
How do i copy the content of a folder into another folder.
doc copyfile doc dir doc fullfile Use dir to get the file name and current path, fullfile to build the old and new full file ...

2 maanden ago | 0

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Answered
How to add a hyperlink of a pdf file within Simulink?
Insert a text box, a link, and then use MATLAB code with open('your_pdf_file.pdf')

2 maanden ago | 0

| accepted

Published


World Bank API Access
Sean‘s pick this week is World Bank API Access by Kim9091. Last year, I blogged about writing your own function...

3 maanden ago

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Answered
Undefined variable "vision" or class "vision.HoughTransform".
Do you have the computer vision system toolbox installed and licensed? ver

3 maanden ago | 0

Published


Get your key press
Jiro‘s pick this week is getkey by Jos.Here’s an entry from a long-time user. Honestly speaking, I’m surprised why this...

3 maanden ago

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