Sean de Wolski

MathWorks

5 787 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
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...

5 dagar 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...

7 dagar 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...

7 dagar ago | 0

| accepted

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)

12 dagar ago | 0

Answered
Finding threshold value with Otsu Method
doc graythresh

13 dagar 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.

13 dagar ago | 0

| accepted

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

19 dagar ago | 1

| accepted

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) ...

25 dagar ago | 0

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

ungefär en månad 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.

ungefär en månad ago | 0

| accepted

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...

ungefär en månad ago | 0

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...

2 månader 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...

2 månader ago | 0

| accepted

Answered
How to add Python Libraries which are referenced in a Python routine
Are you sure the python environment (specified by pyenv) is numpy aware?

2 månader ago | 0

Answered
How to convert image .mat back to the mlreportgen.dom.Image object?
You'll need to write the image back to disk as the report generator needs to deserialize it from this format into the report. If...

3 månader ago | 0

| accepted

Answered
How can I use fmincon into the SPMD when the parameters of objective function differs from on workers to another?
Why not just use parfeval?

3 månader ago | 1

Answered
Shrinking image by averaging
This works img = repmat(1:6,4,1) shrink = @(x)reshape(sum(reshape(sum(reshape(x,2,1,[])),size(x,1)/2,2,[]),2)./4,size(x,1)/2,[...

3 månader ago | 0

Answered
Appdesigner uitable and uistyle
capital S in addStyle :)

3 månader ago | 0

| accepted

Published

Simulink Keyboard Input v2
Will's pick this week is Simulink Keyboard Input v2 by Emanuele Ruffaldi. I have streamed data into Simulink models from...

3 månader ago

Answered
Function 'daysact' not supported for code generation.
You should use the newer and recommended datetime / duration classes which support c-codegen: d = days(datetime(t1)-datetime(t2...

3 månader ago | 0

Published

Convert your live scripts to markdown file
Jiro's Pick this week is Live Script-to-Markdown by Michio, one of my colleagues in MathWorks Japan.As you know, File...

3 månader ago

Published

2020 Index
...

4 månader ago

Answered
Timer callback with alternating paths based upon which path was triggered before
You could use a simple persistent variable in your callback function to maintain state.

4 månader ago | 0

| accepted

Answered
Is this right?
-4 v -5?

4 månader ago | 0

| accepted

Published

Leaf Pile 3D
Sean's pick this week is leafpile3d by Nathaniel Barlow and the extended version with drag by Chris Verhoek. ...

4 månader ago

Answered
Manipulating PowerPoint Custom Document Properties Using ActiveX
You should strongly consider using the MATLAB Report Generator to generate the presentations. It lets you use existing template...

4 månader ago | 0

Published

Aircraft Intuitive Design
Richard is a Consulting Engineer at MathWorks focused on the Embedded Coder product for code generation,...

5 månader ago

Answered
Is there a script or app to convert many (>50) matlab figure files into powerpoint presentation??
You can do this pretty easily with the MATLAB Report Generator. Presentation Generator Development - MATLAB & Simulink (mathwor...

5 månader ago | 0

Answered
Sorting time in 1 hour time slots.
Look at retime. doc retime

5 månader ago | 0

Published

Emulating a physical experiment of measuring M&M’s
Jiro's Pick this week is M&M statistics by Lisa R. Thompson.A common challenge I hear from educators is how to conduct...

5 månader ago