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Matt J


Last seen: Today |  Attivo dal 2010

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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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Risposto
Why is trainlm in train is extremely faster than lm in trainnet options
I suspect that trainnet does not explicitly compute the Jacobian J and J.'*J the way trainlm does. There are memory-conserving v...

2 giorni fa | 0

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Risposto
Why is trainlm in train is extremely faster than lm in trainnet options
The network architectures in the two cases are not equivalent. By default, feedforwardnet uses tansig activations for hidden lay...

2 giorni fa | 0

Risposto
Is There Any Practical Difference Between Extraction and Deletion When Reducing a Vector?
I remember past tests showing that extraction was more efficient, but that was many years and Matlab versions ago. It still appe...

5 giorni fa | 0

Risposto
How to avoid recursion with parenReference
The problem is that no matter how I try to select the subset of objects to return in the third line, it calls parenReference rec...

6 giorni fa | 0

Risposto
How to get var(2:3).fun indexing to work for my custom classdef file (Part 3)
Attached is an alternative solution that skips subsref/subsasgn altogether and instead inherits from the matlab.mixin.indexing.R...

8 giorni fa | 0

Risposto
How to get var(2:3).fun indexing to work for my custom classdef file (Part 3)
You need to implement a numArgumentsFromSubscript method, for example, as attached. a = myclass(1:7); a(2:3).add I surmise...

8 giorni fa | 0

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Risposto
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...

12 giorni fa | 0

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Risposto
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...

12 giorni fa | 1

| accettato

Risposto
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...

18 giorni fa | 1

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

18 giorni fa | 0

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Domanda


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...

21 giorni fa | 0 risposte | 0

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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...

21 giorni fa | 1 risposta | 0

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risposta

Risposto
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...

22 giorni fa | 0

Risposto
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...

30 giorni fa | 1

Risposto
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...

circa un mese fa | 0

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

circa un mese fa | 0

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Risposto
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...

circa un mese fa | 0

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Risposto
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,...

circa un mese fa | 0

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

circa un mese fa | 1

| accettato

Risposto
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...

circa un mese fa | 0

Risposto
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...

circa un mese fa | 1

Risposto
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...

circa un mese fa | 0

Domanda


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...

circa un mese fa | 1 risposta | 0

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risposta

Risposto
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...

circa 2 mesi fa | 1

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Domanda


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...

circa 2 mesi fa | 1 risposta | 0

1

risposta

Risposto
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...

circa 2 mesi fa | 0

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Risposto
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 ...

circa 2 mesi fa | 0

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

circa 2 mesi fa | 0

Risposto
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....

circa 2 mesi fa | 0

Risposto
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...

circa 2 mesi fa | 0

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