Answered
How to avoid counting elements in each row of matrix multiple times?
Xedges=linspace(Xmin,Xmax, Nbin+1); Yedges=linspace(Ymin,Ymax, Nbin+1); N=0; for i=1:height(X) deltaN = histcounts...

14 dagen ago | 0

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How to put different size vectors to one matrix or mat file?
To save to a .mat file save filename d1 d2 d3 d4 To retrieve them, packaged in a struct variable, S=load('filename'); To wri...

14 dagen ago | 1

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Answered
finding the value of a corresponding column in matrix
models = A(A(:,1)==40,2)

16 dagen ago | 0

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Answered
lsqcurvefit answer upon termination?
You can use a nested OutputFcn, like in this example, https://www.mathworks.com/help/matlab/math/output-functions.html#bsgpq6q-...

17 dagen ago | 0

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Answered
Newton Raphson gives answers divided by 0
Raw Newton-Raphson is a pretty terrible method, but I assume you'll tell us you have no choice... [f,M]=preanalysis(); %Symbo...

17 dagen ago | 0

Answered
Adding elements to matrix
A=[1 2 3 4 5 6 7 8 9 10] B=[reshape(A,2,[]); zeros(1,numel(A)/2)]; B=[0,B(:)'] %the result

17 dagen ago | 1

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Answered
What does MATLAB actually do when switching precisions?
I don't know Julia, but I don't believe the binary decomposition was done correctly. Below is the way to do the binary decomposi...

18 dagen ago | 2

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lines that meet each other
You can use, https://www.mathworks.com/matlabcentral/fileexchange/93470-intersections-of-multiple-2d-lines-or-line-segments

19 dagen ago | 0

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How to compute integrals on the GPU using trapz function
You cannot use trapz within gpuArray.arrayfun, but I don't think you really need it. On my computer, the following takes about 3...

19 dagen ago | 0

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Answered
augmentedImageDatastore for image segmentation
Supply the training data in numeric form: X_training = rand([224 224 3 200]) ; %Fake Y_training = rand([224 224 1 200]) ; %Fak...

20 dagen ago | 1

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Answered
Interpolation to arbitrary points on a patch plot
For example, F=scatteredInterpolant(msh_1.xy, q); interpolatedValues = F({[0.68,1.87],0:0.2:1})

20 dagen ago | 0

Answered
When eigs uses a custom function as input, it cannot compute an eigenvalue near a specified sigma
n = 10; A = randn(n); A = A + A'; E1=eigs(A,5,'sa')'; sigma = E1(2)+1; E2=eigs(A,5,sigma)'; E3 = eigs(@(x) (A-s...

20 dagen ago | 0

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solving quadratic roots in matlab
Hint: You should consider applying the quadratic formula.

20 dagen ago | 0

Answered
how to create image data store? I do not have clarity regarding the arguments in ImageDataStore as studied from the website
Matlab does not understand (and neither do we) how a single "test1.tif" is supposed to specify labels for all of your images. Th...

20 dagen ago | 0

Answered
Running into issue using fsolve
There are no errors in what you've shown, but it is peculiar that you have one optimization (with fsolve) nested inside another ...

20 dagen ago | 0

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How to ask Matlab ga to continously regenerate individuals until they all satisfy user defined constraints prior to fitness evaluation
The way to handle that is to have the fitness function skip the FE modeling and return Inf (or some large penalizing value) if t...

21 dagen ago | 0

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Efficiently handling extremely large matrices (N x N) in MATLAB (e.g., N = 137 million)
Could you provide examples of using sparse matrices You give us wide latitude on what the example can be be, so here is one: A...

22 dagen ago | 0

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Fast dataset manipulation in MATLAB
The implementation that you wrote first, R = [cos(theta) -sin(theta); sin(theta) cos(theta)]; bary = R' * (y - p); is alre...

22 dagen ago | 1

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Answered
Expanding a cell array in table into multiple rows
Here's a scaled-down example: T=table(1,2,3,{rand(4,3)}, {rand(4,1)}); T.Properties.VariableNames(end-1:end)=["A","B"] n=...

22 dagen ago | 0

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Answered
Camera calibrator (picture capture)
Yes, for single camera calibration, it shouldn't matter whether the camera or the pattern (or both) are moving, as long as you d...

22 dagen ago | 0

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User Defined Functions in MATLAB
prodby2_kweave19(6) function product = prodby2_kweave19(N) product = prod(1:2:N); % User inputs N, as the argument to the...

22 dagen ago | 0

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Answered
Increasing lsqcurvefit/nlinfit speed
It would definitely be faster to attach the table as an external variable to an anonymous or nested function, than to freshly lo...

22 dagen ago | 0

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Answered
How to interpolate one axis in a 3D data?
load dats; F=griddedInterpolant(ss); ss=F({1:139,1:48, linspace(1,9,100)});

24 dagen ago | 0

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Answered
Using lsqnonneg to determine if there exists a solution to a (generally) under-determined linear system, but error is too large to be convincing.
A better way to investigate the existence of a solution to Aeq*x=beq, x>=0 might be (as below) to find the minimum distance betw...

24 dagen ago | 0

Answered
Using lsqnonneg to determine if there exists a solution to a (generally) under-determined linear system, but error is too large to be convincing.
There is nothing that can be inferred from the resnorm alone about the quality of the solution. 10^-3 is a very good result if t...

24 dagen ago | 0

Answered
Creating multiple cylinders in different coordinates
Using cylindricalFit() from this FEX download https://www.mathworks.com/matlabcentral/fileexchange/87584-object-oriented-tools-...

27 dagen ago | 0

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How many workers for fmincon with UseParallel?
Is the reason to set UseParallel to true when solving a problem with fmincon that it can potentially speed up the evaluation of ...

27 dagen ago | 0

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Answered
How to find the span of a matrix in matlab?
You can use this, https://www.mathworks.com/matlabcentral/fileexchange/77437-extract-linearly-independent-subset-of-matrix-colu...

27 dagen ago | 0

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Reliably determine RAM consumption of MATLAB variables
I am looking for a reliable way to determine how much RAM is devoted to Matlab variable data at a given moment. The whos() comma...

28 dagen ago | 0 answers | 0

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Answered
Error using trainNetwork - possible change with Matlab release?
Convert the data to cell array form. XTrain=num2cell(Xtrain,[1,2,3]); XTrain=XTrain(:); YTrain=num2cell(YTrain); YTr...

28 dagen ago | 0

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