Answered
Shuffle order of cell array without repeating rows
This does not require any special structure of the input (such as number of elements; or groups, or cardinal of groups, or the o...

10 months ago | 0

Answered
Nested for loop - adding elements to a matrix
Try this modification EEG_NofSC = zeros (Nchannels,Nepochs); % move outside the outer loop for iNepochs = 1 : Nepochs ......

10 months ago | 0

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Answered
Error: Warning: Matrix is close to singular or badly scaled. Results may be inaccurate.
N=30; % compute the chebyshev differentiation matrix and x-grid Ly =3; eta_ygl = 2/Ly; etagl = -cos(pi*(0:N)/N)'; ygl = ...

10 months ago | 0

Answered
Split non-bijective function into two bijective regions
x = [4;2;3;6;6.5;4.5;1;1.5;3.5;2.5;5;6.2;2.8;6.3]; y = [5.5;6.5;1;4;1.5;1;2;7;6;1.8;5;1;6.2;3]; % TSP to order the data, See...

10 months ago | 1

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Answered
Why is there a difference in computing least squares although same symbolic operator \ is used?
"I'm guessing for my case only the documentation of page * matters? " Yes For numerical case and vector of RHS b x = A\b is ...

10 months ago | 0

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Answered
Does parfor inside lsqnonlin with UseParallel=True work properly?
If your function use parfor internally then you should NOT set UseParallel to true.

10 months ago | 0

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Help finding datapoints in x,y falling outside the boundaries of a polygon. Incongruencies between inpolygon and inpoly2, time issues, and possible solutions
The reason that inpoly2/insidepoly fail because the polygons p1 and p3 have holes, therefore px.Vertices have NaN values. Here ...

10 months ago | 1

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Answered
generate a plane that has the coordinates of a 3D matrix as its boundary
Why don't you do the very obvious? load('C.mat') patch(C(:,1),C(:,2),C(:,3),'k') hold on plot3(C(:,1),C(:,2),C(:,3),'g.','Ma...

10 months ago | 0

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Answered
can i velocize it? (if possible to vectorize)
On my computer the acceleratoion of Method V2 is more impressive load('matlab_DD.mat') load('matlab_minTrades.mat') load('m...

10 months ago | 0

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Answered
clc command window restore
From MATLAB windows go to the menu Layout -> Command History -> Dock. You then have a tab "Command History" appears on the right...

10 months ago | 0

Answered
How can I log commands being executed by matlab? Like diary() but for all function calls.
Check out profile see if it meets your need.

10 months ago | 1

Answered
calculate the normal for a plane passing through more than three points
load('V1_in.mat') [~,~,V]=svd( V_1-mean(V_1)); N=V(:,3)

10 months ago | 0

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Answered
Changing default encoding of MATLAB
I see someone succeed in older MATLAB by editing the file [matlabroot '\bin\lcdata.xml'] Ref in this thread https://www.math...

10 months ago | 0

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Answered
Dynamic Assign Field Access in MATLAB Structures
clear s=struct('a',1,'b',2,'c',3) % this is a dirty command that pops the field values to the workspace cellfun(@(f) assignin...

10 months ago | 0

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Skipping iteration on child throwing a warning
Modification of script_Z for k = 1:200 lastwarn('',''); % clean the warning state x = input_postprocessed_1/input_pos...

10 months ago | 1

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Answered
(Matlab Coder)Domain error. To compute complex results from real x, use 'acosd(complex(x))'
"Obviously, the a,b I gave are equal and the val value should be equal to 1" wrong. Before claming anything, you should first c...

10 months ago | 0

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Answered
Compute group statistics when the group definition is an OR of values found in several columns of a table
I submit a method without loop. I expected to be faster but to my surprise it is slower than v2. But at least it is scalable. %...

10 months ago | 0

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Answered
Why I am getting "Matrix is singular to working precision"?
The warning message is there "Matrix is singular to working precision" because your equations are dependent % 2*w+3*x+y-11*z =...

10 months ago | 0

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how to effectively find a starting point for fzero?
The problem is not finding the right starting point, the problem is that your function func implementation returns NaN for large...

10 months ago | 0

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How to estimate 95% probability contour in bivariate kernel density function MATLAB
I'm not sure if there is a standard definition of area of 95 confidence in 2D pdf since it like asking what if the shape of 95% ...

10 months ago | 0

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How to keep the values for particular dimension of a matrix and rest of the dimension will be zeros?
A single line solution A(~(ismember(1:size(A,2),350:400) & ismember((1:size(A,1))',20:35))) = 0

10 months ago | 0

Answered
Finding value in Matrix to corresponding minvalue Position in different Matrix
A=randi(10,5) B=randi(10,5) [Amin,jmin]=min(A,[],2) % Amin is A(sub2ind(size(A),(1:size(A,1))',jmin)) % Bmin = B(sub2ind(si...

10 months ago | 0

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Answered
generate new coordinates (starting from initial coordinates) that are arranged outwards (by a distance H) and on the same plane
load('trace.mat') mt = mean(trace); dt = trace-mt; [~,~,V]=svd(dt); Q=V(:,[1:2]); t2D = dt*Q; [~,is]=sort(atan2(t2D(:,...

10 months ago | 0

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Answered
What will be a suitable option to circumvent a non-invertible matrix?
When you encount warning message like this, the first thing to ask is not "how do I change linear inversion algorithm?", but "wh...

10 months ago | 0

Answered
Determine the intersection coordinates between a 3D object and an infinite plane
Mesh your plane then use this https://www.mathworks.com/matlabcentral/fileexchange/49160-fast-mesh-mesh-intersection-using-ray-...

10 months ago | 0

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Answered
How to tune matrices to specific output?
Use lsqnonlin (or such) if you have optimization toolbox.

10 months ago | 1

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Answered
Converged to an infeasible point
I interpret fmincon message for you : Your system is not really controllable and the solution of the final step is driven by the...

10 months ago | 0

Answered
I will find an xy dataset satisfying an implicit equation.
f = @(x,y)(x.^2 + y.^2).^3 + (15.*x + 3.3.*y).*(x.^2 + y.^2).^2 + (62.5.*x.^2 + 20.*x.*y - 8.37.*y.^2).*(x.^2 + y.^2) - 17.*x.^3...

10 months ago | 0

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Answered
Problems with savepath in R2023b
On Windows to fix it you need to change the Security setup of the file pathdef.m Right Click on file, Properties, Tab Security, ...

10 months ago | 2

Answered
generate triangular mesh starting from the external nodes (rx3) of a circle
load V; n=size(V,1); % 360 stlwrite(triangulation([ones(n-2,1) (2:n-1)' (3:n)'],V),'mycircle.stl')

10 months ago | 1