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Sean de Wolski


Last seen: Today

MathWorks

5,678 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
Importing NetCDF files: Script stops when a variable is missing from a file.
Use ncinfo to determine if the variable exists in the file before you to try to read it.

2 days ago | 0

Answered
Error when assigning categories to a tall array
That also appears to be a bug in how tall handles scalar strings for cats and values. If you make code and meaning into vectors...

7 days ago | 0

| accepted

Answered
replace function in tall array. This indicates an internal error. Please contact MathWorks Technical Support.
At the very least it's a doc bug because the doc says that tall arrays are fully supported for replace. It does appear to work ...

7 days ago | 0

Answered
App Designer Main Window Behaviour
You should consider just using menus since that's what you're replicating with tabs. https://www.mathworks.com/help/matlab/ref/...

8 days ago | 0

Answered
Export Table from Matlab Guide to Excel
This would be a lot easier in App Designer because the uitable data can just be a MATLAB table. I'd strongly encourage you to m...

11 days ago | 0

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Answered
Matlab app designer can't go further than the first dropdown value
if app.ConfigDropDown.Value == '1' elseif app.ConfigDropDown.Value == '2' elseif app.ConfigDropDown.Value == '3' en...

13 days ago | 1

Answered
Label connected components in binary image using non-standard pixel connectivity
Call imdilate with a custom structuring element of your size. This will then expand the regions so they overlap and bwlabel can...

14 days ago | 0

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Answered
Create a 32bit compatible standalone App with MATLAB R2019b
This is directly ony possible with R2015a or older, the last release to support 32 bit. You may consider using web apps which...

17 days ago | 0

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Answered
Resize Figure for Word report
You should really consider using the MATLAB Report Generator. You can simply add, a figure to a Word report (no COM API etc.). ...

19 days ago | 1

Answered
Error using Matlab Compiler
The symbolic math toolbox can't be compiled. You'll need to take the symbolic expression and convert it to a numerical one usin...

24 days ago | 0

Published


Draw a bubble bath
Jiro‘s Pick this week is bubblebath by Adam Danz.Adam is no stranger to File Exchange and File Exchange Pick of the...

1 month ago

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Published


Spider Plot III – Custom Charts (Authoring)
Sean‘s pick this week is spider_plot by Moses. Last week, we looked at the custom chart I created.  This week, we’ll look at...

2 months ago

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Answered
2019b warnings popping up never had this before with 2019a
I've seen this warning in 19b too! Not sure if there is a change to the PNG library being used or if my image is corrupt/out of...

2 months ago | 0

Answered
checking dataType instead typecast at property or argument validation
There's no way to do this with validators in R2019b and the datatype coercion will always happen. You can use a set.property se...

2 months ago | 0

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Answered
Problem with accumarray/histcounts
This isn't the easiest to understand algorithm in the world but I think it does exactly what you want. n = size(C,1) ix = ceil...

2 months ago | 0

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Answered
what's a externally defined MCOS class ?
I'd contact tech support on that one.

2 months ago | 0

Published


Spider Plot II – Custom Charts (Intro)
Sean‘s pick this week is spider_plot by Moses. Contents Custom Charts Using the Custom Chart Comments Custom Charts My...

2 months ago

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Answered
How do I add multiple .PNG files to an existing PowerPoint (.pptx) file using a for loop?
I'd strongly encourage you to look at the MATLAB Report Generator for this which has the ability to easily add or replace conten...

2 months ago | 0

Answered
Integrating MATLAB Maps Broswer in my App Designer Project
Webmaps aren't supported in app designer. Look at using geoplot with the correct base map. Think this will get you what you wa...

2 months ago | 0

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Answered
Is there a way to get the top k values per row of a MATLAB array?
I'd probably do something like this: x = magic(4) k = 3 [~,idx] = maxk(x,k,2) for ii = 1:size(x,1) x(ii,~ismember(1:siz...

2 months ago | 0

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Answered
How to count the number of 1 between two 0 in a vector?
[regionprops(bwlabel([0 1 1 1 0 0 1 0 1 1 0 1]),'Area').Area]

2 months ago | 0

Answered
In programmatic report generation how can I display numbers in engineering format inside a table?
Look at the NumericFormat property of the MATLABVariable class https://www.mathworks.com/help/rptgen/ug/mlreportgen.report.matl...

2 months ago | 0

Published


Racing bar charts
Jiro‘s Pick this week is barChartRace by Eiji Konaka.This an example of a nice outcome that spawned from a community...

2 months ago

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Answered
How to combine all CT files to make a single array/matrix?
Look at dicomreadVolume! https://www.mathworks.com/help/images/ref/dicomreadvolume.html

2 months ago | 0

Answered
Retrain model, Classification Learner
When you export the model, there's an option to generate a function. This function can be used to retrain the model on new data...

2 months ago | 1

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Answered
drawellipse not working, can't reproduce example
which -all drawellipse Looks like you're shadowing this.

2 months ago | 0

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Published


digCircs
Sean‘s pick this week is digcircs by Graham W Griffiths.   My pick this week is a really cool visualization of the numbers...

3 months ago

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Answered
How to share and update property value across different objects.
Put a breakpoint on this line: cgmObj.set_interstitial_BG(val); And see what cgmObj is and if it has a set_interstitial_BG(val...

3 months ago | 0

Published


Determining next available file name
Jiro‘s Pick this week is nextname by Stephen Cobeldick.Stephen is no stranger in the MATLAB user community arena. As of...

3 months ago

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