Matt J

Last seen: Today | Attivo dal 2009

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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
Which dimension(s) does trainingOptions shuffle apply to?
You can use analyzeNetwork to see which dimension is the batch dimension.However, I believe it will always be the last dimension...

circa 13 ore fa | 0

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finding partial solutions from ill-conditioned equations
If you don't know the subset, you could download licols from the File Exchange, https://www.mathworks.com/matlabcentral/fileexc...

1 giorno fa | 0

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finding partial solutions from ill-conditioned equations
If you know which x(i) are well-determined, you could use lsqminnorm. In this example, we know that only x(1:2) are well-determi...

1 giorno fa | 0

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Optimization method based on the Nonlinear least squares as well as fmincon for the defined objective function (Non-linear function).
The goal is to use some inverse method to get the same 3D datasets; therefore, after defining the objective function, I applied ...

1 giorno fa | 0

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Optimization method based on the Nonlinear least squares as well as fmincon for the defined objective function (Non-linear function).
If you have the Computer Vision Toolbox, you could try triangulateMultiview.

2 giorni fa | 0

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I am encountering a persistent error with the predict function in the Deep Learning Toolbox within MATLAB 2024b.
You need, testDlarray = dlarray(randn(inputSize,1), 'CB'); or, testDlarray = dlarray(randn(1, inputSize), 'BC');

2 giorni fa | 0

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I have a N*N matrix depicting the intensities at different points in a circular plane. They are different intensities on a disc. How to plot the image?
clc, close all force N = 10; % Number of polar samples M = peaks(N); % Example heat map data T = linspace(0, 2*pi, N)'; %...

4 giorni fa | 0

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Parpool in Pattern search with temp directories
The process continous but i get these warnings:Warning: Unable to create a parallel pool. Continuing with evaluations in serial....

4 giorni fa | 0

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Fittype that calls a subfunction and integration with appdesigner
Your model is linear (in p). Using a nonlinear least squares fitter is super inefficient. So, instead, you should do, A = cell...

5 giorni fa | 0

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Diff does not work with symmatrix
Element-wise exponentiation is not a standard matrix algebra operation. I imagine it is for that reason that symmatrix.diff() do...

5 giorni fa | 0

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How to call a centralized class from multiple deployed applications
If the platform is Windows then, according to ChatGPT, you can deploy the class as a COM server, so that another deployed MATLA...

6 giorni fa | 0

Domanda

Define a custom input layer in the deep learning toolbox
In the Deep Learning Toolbox, it is possible to define one's own custom output layers and hidden layers. Is there no way to defi...

6 giorni fa | 0 risposte | 0

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How to plot a loss function in reinforcement learning
This File Exchange submission looks reasonably popular, but I haven't used it myself, https://www.mathworks.com/matlabcentral/f...

6 giorni fa | 0

Risposto
Is it possible to reduce this for loop into one line of code?
Headers = findMissing(Headers); %One line

6 giorni fa | 1

Risposto
Pagewise multiplication along a dimension without using a for loop?
If you can build X in cell array form, instead of 4D form, you can save some time as well: X = randi([1 10],2,2,10,5); Xc = ...

6 giorni fa | 0

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pinv failing on single precision matrices
It doesn't look like a bug. Contrary to what you claim, the matrix is not very invertible, showing a condition number of ~1e7, ...

6 giorni fa | 0

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freeze some weights inside of a fullconnected layer
It is possible with a custom layer. See this recent, related thread, https://www.mathworks.com/matlabcentral/answers/2174601-ho...

8 giorni fa | 0

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Cell2table issues when a numerical column is read as strings
I would also have many columns, some of which could be made up of: (a) all doubles (b) a mix of empty strings (e.g., ' ', ' ...

8 giorni fa | 0

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Risposto
Pagewise multiplication along a dimension without using a for loop?
No, but looking at your code, I would guess that the speed is being encumbered much more by the operation length(X(1,1,1,:)) tha...

9 giorni fa | 1

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Add a class folder to path
Nothing is wrong. @-directories should not and do not need to be on the path as long as their parent directory is. You can auto...

9 giorni fa | 0

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How to read all rows of an Excel with missing rows included?
ActiveX can be used to determine the last row/column of the worksheet: Then, you can force readcell to read in a larger range wi...

10 giorni fa | 0

Domanda

Make gca() responsive to appDesigner axes clicks
I have an appdesigner app such as below with a uipanel containing regular images (not uiimages). I also have many, many standal...

11 giorni fa | 1 risposta | 0

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polyshape not closing a circle
An added complication is that the resulting union may have multiple regions, so I cannot just duplicate the first vertex to the ...

11 giorni fa | 0

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How can I create multiple function handles in a for loop?
The best would be to just have a matrix-valued function, fun=@(x) x.^2-mymat(:).*x+mymat(:) but you could make a cell array of...

12 giorni fa | 0

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Filtering Blobs on a Binary Image
If you can form an under-estimate of the extent of the blobs, let's call them sub-blobs, then you can fit a Gaussian lobe to the...

12 giorni fa | 0

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Why does the Code Analyzer flag this as an error?
Mathworks Support has classified it as a bug.

13 giorni fa | 1

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Risposto
How do you change the output dimension of a NN layer?
Should I flatten the inputs and then concatenate them similar to this example? Probably. See if the attached network does what...

13 giorni fa | 0

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Display a small matrix as a gray scale image
T2 =[ 0.4706 0.9804 0.8392 0.3216 0.9804 0.8392 0.3216 0.4706 0.8392 0.3216 0.4706 0.9...

14 giorni fa | 0

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Risposto
How to freeze specific neuron weights in a feedforward network during training process?
I don't think you can do it without the Deep Learning Toolbox. If you have the Deep Learning Toolbox, you can define a custom la...

14 giorni fa | 0

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Risposto
Please help with this multiplication problem
You can multiply directly. Example: [m,n,r]=deal(3,4,2); A=rand(m,1,r); B=rand(1,n,r); C=A.*B; whos A B C

14 giorni fa | 0

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