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Matt J


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Professional Interests: medical image processing, optimization algorithms PLEASE NOTE: I do not read email sent through my author page. Please post questions about FEX submissions in their respective Comments section.

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Réponse apportée
How to get "end" indexing to work in my custom classdef file
It doesn't appear that you have supplied an overloaded end(...) method for the class. I imagine you would want something like t...

1 jour il y a | 0

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Is it More Efficient to Load a Subset of Variables from a .mat File Rather than All of the Variables?
I would expect Option 2 to be more efficient, especially when compression is applied. By specifying a subset of variables, load...

1 jour il y a | 0

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Is rowfun Showing Strange Behavior when the Target Function Returns an Empty Output?
How could fun2 return an output with more than one row when applied to the third row of T when the output in that case should be...

7 jours il y a | 1

Réponse apportée
How to erase a substring that starts with a given pattern?
c = ["Glucose C6H12O6"; "Benzol C6H6"]; pat = " C" + digitsPattern + "H" + digitsPattern; extractBefore(c,pat)

8 jours il y a | 0

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Question


Interacting with the sub-components of a Custom UI Component
I have started gettng my feet wet with custom UI components in App Designer. Here's one I just created, which consists of severa...

10 jours il y a | 1 réponse | 0

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Question


Why does Matlab care how many output arguments I specify?
I've never known any native Matlab function to place a requirement on the number of ouput arguments that I request. For some rea...

10 jours il y a | 1 réponse | 0

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Is it possible to print results from appdesigner, using Matlab 2018?
Are you saying you just want a screenshot of the app window itself? If so, there is Matlab code for screnshotting on the File Ex...

12 jours il y a | 0

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Best practice for passing structure to a function and adding new fields when returning it
Which of the following is considered best practice? I would say the most common (and therefore perhaps the best) practice is Op...

20 jours il y a | 1

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Saving large mat-files 2-4 GB takes 1 or 2 min. how to do things in paralell?
See Run Functions in Background. You might also consider storing directly in HDF5 using h5create and h5write. It is essentially...

22 jours il y a | 0

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Sequential neural network training with 1-D function layer
You could try islocalmax instead, if a mask of the maxima locations is sufficient.

23 jours il y a | 0

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Can Same Commands in Debugger and Command Window Exhibit Different Behavior?
I suspect the only reason size() reports that foo is 1x2 in the first place is because size() is overloaded by class sym to do s...

24 jours il y a | 0

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Improving my forwardfill call
A = [0.1 0.2 0.3 NaN NaN NaN 0.7 NaN 0.9 1] A_ffilled = forwardfill(A,1) A_ffilled = forwardfill(A,2) EDIT: function [B,...

27 jours il y a | 0

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Transparency of background in MATLAB figure
Use export_fig, https://www.mathworks.com/matlabcentral/fileexchange/23629-export_fig with the "-transparent" flag.

28 jours il y a | 1

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Réponse apportée
Lake America used as a name in Mapping Toolbox
I need to know if, like how I now view Google Earth/Maps and Alphabet Inc, I need to inject a level of mistrust and loss of resp...

30 jours il y a | 0

Réponse apportée
Any quick fix for this matrix-scalar simplification?
Here's one approach. Limitation: all matrices in the expression must be explicit variables with names that can't end with number...

environ un mois il y a | 1

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pinv function is supported for dlarray input while the pageinv function is not supported
If your inputs to the operation will always be a 3x3XN stack, as in your example, then you can use the code below in conjunction...

environ un mois il y a | 0

Question


functionSignatures.json for built-in functions
I would like to define code suggestions/completions for built-in Matlab functions. This document, https://www.mathworks.com/hel...

environ un mois il y a | 1 réponse | 0

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How to modify Find Files GUI file size threshold
After consulting Tech Support, I have learned that the field will re-enable if non-empty text is entered into the "Find Files co...

environ un mois il y a | 1

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How to modify Find Files GUI file size threshold
In the "Find Files" GUI there is a "Skip files over" field that sets an upper limit on the file size to include in the search. F...

environ un mois il y a | 1 réponse | 0

1

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How Can Short-Circuiting Logical Operators &&, II be Overloaded in a Classdef?
You can't overload && or || directly. It would make their common usage less efficient if the parser had to check the class of al...

environ un mois il y a | 0

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anonymous function with rng call inside
rng('default') T= rand(1,10); t=1:15; T(ceil(t/10)) ans = Columns 1 through 9 0.8147 0.8147 0.8147 ...

environ un mois il y a | 0

Réponse apportée
anonymous function with rng call inside
function y=f(t) rng(ceil(t/10)); y=rand(1); end

environ un mois il y a | 0

Réponse apportée
Neural Network with custom performance function
If you are using trainnet, the lossFcn input argument lets you supply a custom loss function explicitly, https://www.mathworks....

environ un mois il y a | 0

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Histogram gives a wrong result?
Due to the floating number? Correct. There is no reason to expect exact boundaries, or for data to fall exactly within those bo...

environ un mois il y a | 0

Réponse apportée
Get back find in files interface from before 2025b
This search and replace app from the File Exchange might be worth considering as a possible substitute, https://www.mathworks.c...

environ 2 mois il y a | 0

Réponse apportée
Is delegated or department-level license administration possible?
If not, how are other universities or large organizations handling this? It's horrendous. Every time I want to upgrade my Matla...

environ 2 mois il y a | 0

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Help with this triple nested for loop
I don't know what you're trying to do with Ux, but U is just, U = cat(3, ... repelem(cat(3,A1,A2,A3,A4),1,1,6), ... r...

environ 2 mois il y a | 0

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Classdef Static method calling builtin subsref instead of classdef subsref
With the newer modularized indexing, the overloaded indexing will be active inside the classdef. So, one option is to overload y...

environ 2 mois il y a | 0

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Plotting fit lines on multiple sets of data in one plot - how to limit each of the fit lines start and end points?
From the documentation: plot(cfit,x,y) plots cfit together with a scatter plot of the data in x and y. The axes limits are give...

2 mois il y a | 0

Réponse apportée
fmincon solver for nmpc applications
FMINCON's sqp algorithm does not accept a HessianFcn parameter. You would need to switch to either trust-region-reflective or in...

2 mois il y a | 0

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