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find unique array cell with 2 field
>> findgroups(f(:,1),f(:,2)) ans = 1 1 3 2

2 years ago | 0

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Answered
Question regarding calling the destructor of a broadcast variable in parfor.
It is because you have 6 workers in your parpool. Therefore, a copy of Mage is sent to each worker, for a total of 6, during par...

2 years ago | 0

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Answered
find unique array cell with 2 field
load('matlab_f.mat') table2cell(unique(cell2table(f),'rows'))

2 years ago | 0

Answered
Problem with ploting involving function handle
Perhaps this is what you meant? N= 600; COMx_k = @(k) real(sum(1.*exp(-2*pi*1i*(k/N).*(1:N)' ),1)); %k=0:0.1:300 fplo...

2 years ago | 0

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Answered
how to change the image from axial to sagittal
imtool3D() is not a native Matlab function, but I imagine if you permute your data permute(data,[3,1,2]) so that its slices are ...

2 years ago | 0

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Answered
How to add an NVCC flag
Downgrade to Visual Studio 2019. See also, https://www.mathworks.com/matlabcentral/answers/2158705-mexcuda-can-t-find-visual-st...

2 years ago | 0

Answered
starting vector (zero vector) equals lower bounds but gets projected to non-zero vector
This behavior is specific to the interior-point algorithm. As the name suggests, an interior-point algorithm must start at an in...

2 years ago | 1

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Finding concave hull around abstract shape
ps = load('matlab_answer_example.mat').new_polyShape1; tic; V=cell2mat(arrayfun(@(i) upsamp(polybuffer(ps,-i)),[0,1],'Unifor...

2 years ago | 1

Question

mexcuda() can't find Visual Studio 2022, but mex() can.
In R2024a, I encounter the following when trying to compile with mexcuda in conjunction with Visual Studio 2022. >> mexcuda -la...

2 years ago | 1 answer | 0

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answer

Answered
loading and training an existing network.
previous = load("savednet","net","layers"); net = trainNetwork(data,clabels,previous.net,options);

2 years ago | 0

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Answered
Interpolate and plot a surface in a rotated coordinated system
I'm not familiar with the FEX submission you used, but I can show how I would do it with this one, https://www.mathworks.com/ma...

2 years ago | 0

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Find the indices of numbers that occur first
You won't be able to do better than a for-loop over the V(i).

2 years ago | 0

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scale/normalize parameter vector for optimization
The transformation is non-differentiable, and probably is not a good idea for Optimization Toolbox optimizers which are smooth ...

2 years ago | 0

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I have shifted from lsqnoneg to lsqlin because lsqnonneg does not support additional constraint is it right or wrong choice?
If your lsqlin can solve your problem, then there is usually never any reason to use lsqnonneg. lsqnonneg is for nonlinear least...

2 years ago | 0

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Why is my hamming window and rectangular window values the same for sigma_omega when I make L = 21?
% Set window length L = 21 L = 21; % Generate rectangular and Hamming windows rect_window = window(@rectwin, L); hamming_w...

2 years ago | 0

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Answered
How to identify Gaussian type maxima in an image
using imregionalmax i can generate a list of candidate. I wanna check each one now. I may like to filter the one which are non s...

2 years ago | 0

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transform linear inequality constraints into bound constraints for optimization solvers
Yes, a set A*y>=0 is a cone and so can equivalently be expressed as where are the so-called extreme rays of the cone and are ...

2 years ago | 0

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Cannot define a cell array of custom classes in function argument validation
classdef Session < handle %SESSION Summary of this class goes here % Detailed explanation goes here properties (Acc...

2 years ago | 1

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How to convert two nested for-loops to one parfor loop.
It does not seem advisable to use parfor. Everything in your code is vectorizable. However, here is what a parfor approach could...

2 years ago | 0

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Answered
Why can't we define properties on enumerations extending from built-in classes?
I don't know why. I suspect it is for the same reason why builtin indexing and concatenation no longer works when you add proper...

2 years ago | 0

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Answered
Why did CD folder; give such a goofy error message when I just forgot ()
Because cd apploc is equivalent to, cd('apploc') This is a general thing in Matlab function-calling syntax. For any functio...

2 years ago | 1

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moving median with variable window
Anyway, I will be very happy for any hint how to apply robust median filter on my use case, where separate parts of signal shoud...

2 years ago | 0

Answered
moving median with variable window
x = rand(1,6) k = [2,3,3,5,3,2]; n=numel(x); J=repelem(1:n,k); I0=1:numel(J); splitMean=@(vals,G) (accumarray(G(:),vals...

2 years ago | 0

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Minimum CUDA driver version which works with R2024a
The driver version you need is a function of your GPU card. Why not just install the latest one as the error message suggests? ...

2 years ago | 2

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Moving window percentile computation using Conv
See ordfilt2.

2 years ago | 0

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Modifying arrow length based on intersection with polygon
An alternative to Mike's approach using linexlines2D() from the File Exchange, https://www.mathworks.com/matlabcentral/fileexch...

2 years ago | 1

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Should table Indexing be Faster?
I haven't profiled it, but I would bet that the following line, from @tabular/braceReference b = t.extractData(varIndices); is...

2 years ago | 1

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Answered
N-dimension curve fit how to
Perhaps polyfitn will help, https://www.mathworks.com/matlabcentral/fileexchange/34765-polyfitn

2 years ago | 0

Answered
How to speed up vectorized operations for dynamic programming
This might be a little faster. betaPZtransp=beta*PZ'; tic while err>tol && iter<=max_iter RHS = Ret + reshape(V0*bet...

2 years ago | 1

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Answered
Is there a meaningful guideline on when to use parentheses vs square brackets vs curly brackets in writing MatLab code?
General If we forget about indexing for the moment, it becomes very simple. Function calls use parentheses, and only parenthese...

2 years ago | 2