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App Designer-Unrecognized variables
Try this: % Button pushed function: RUNButton function RunSimu(app, event) % Get all variable names in the base workspace va...

5 mois il y a | 0

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MATLAB eig function giving different eigenvectors on different computers?
"In both cases the computation A*V - V*D yields a matrix with entries on the order of 1e-14, so all is well numerically in both ...

5 mois il y a | 1

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How to rewrite this high dimensional matrix calculation
Fully vectorized Y = reshape(X, [], 1, C); Z = reshape(Y, 1, [], C)-Y; Z = reshape(Z, [], C); Z(1:A*B+1:end,:) = Y; Z = res...

5 mois il y a | 1

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Is genetic algorithm far from upper bound ?
Use optimization with constraints to fix the upper bound You can provide the upper bound in ga as well

5 mois il y a | 0

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Interpolate and plot a surface in a rotated coordinated system
Try this and see if it's OK for you load('measurement_data.mat'); % fit a plane through the data and plot xyz = [x y z]; [...

5 mois il y a | 0

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Check if file directory exists, else create it
mkdir(FullDirectory) rather than mkdir FullDirectory

5 mois il y a | 0

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scale/normalize parameter vector for optimization
An interesting idea of generic "preconditioning" of Bspline approximmation is working with Dual Bernstein basis, decribe in Lu p...

5 mois il y a | 0

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scale/normalize parameter vector for optimization
1. In machine learning literature, I often encounter [0,1] scaling as a common technique. Would this approach be suitable for m...

5 mois il y a | 0

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Calculation of the moving mean for the first items
From movmean doc "M = movmean(A,k) returns an array of local k-point mean values, where each mean is calculated over a sliding ...

5 mois il y a | 0

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Intersection of Discretized Curves
Use this file exchange https://www.mathworks.com/matlabcentral/fileexchange/22441-curve-intersections This code is robust, it d...

5 mois il y a | 1

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How can I run code just once, for multiple intervals of numbers?
Use for loop

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How to write ASCII to byte file?
bytes = uint8([126, 129]) data = char(bytes); % Exceeds 7 bit ASCII Not sure about the encoding standards but this seems t...

5 mois il y a | 2

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Delete a timer object in it's callback
I don't know, but I have programmed the same toys, my worlflow is like this close all; fig = figure; ax = axes('Parent', fig)...

5 mois il y a | 0

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How to open help doc in a Window rather than browser？
https://www.mathworks.com/help/install/ug/install-documentation-on-offline-machines.html

5 mois il y a | 3

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transform linear inequality constraints into bound constraints for optimization solvers
No you cannot. It is well known that any generic linear constraints Aeq * x = beq A * x <= b lo <= x <= up is equivalent to...

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Question

Intel ARC graphics device and MATLAB
Not really a question but I would like to report many issues withh App Designer and its stand alone version when using with Inte...

5 mois il y a | 1 réponse | 0

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How can I determine the angle between two vectors in MATLAB?
There is a good formula from Kahan, chap 12 of this Mindless paper, for given x and y two vectors of length(m) - in R^m, the ang...

5 mois il y a | 3

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moving median with variable window
One way (for k not very large) x = 1:6 k = [2,3,4,5,3,2]; % Note: I change k(3) to 4 winmedian(x,k) function mx = winmedia...

5 mois il y a | 2

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How to measure graph wave distance ?
It looks like you need to rotate the whole picture (red line + blue curve) to minus the slope of the red line. After rotation t...

5 mois il y a | 0

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Quivers/streamlines not perpendicular to contours
Add the command axis equal Different aspect ratio in x and y can skew the perpendicularity visually.

5 mois il y a | 0

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MATLAB Error - Local function name must be different from the script name.
Perhaps swap those two fitst lines in your code file function F = c_objective(x) global intcon f Q nmsi M S I ... Warning: u...

5 mois il y a | 1

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question about function handles in OO
Something extra must happen internally by the parse when you create function from method, but it only happens at the first level...

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Question

Chasing what is wrong with 'dual-simplex-highs' in linprog
I try to see why 'dual-simplex-highs' algorithm fails and 'dual-simplex-legacy' works OK on this specific LP problem of size 46...

6 mois il y a | 3 réponses | 2

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Best computer specifications for fast Matlab numerical simulations/integrations?
The bench command in R2024a rates intel i9-12900 CPU on Windows 11 and Mac M2 best for ODE IMO the intel processor get hot easi...

6 mois il y a | 1

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I substracted two 3D matrix and get a 2D matrix instead of 3D matrix, why?
You need to put 3 indexes in 3d array. If you put 2 it reshape your array to 2D. The correct command is probably dp=minus(p(1:...

6 mois il y a | 0

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Scatteredinterpolant (linear) from symmetric data does not produce symmetric isolines
scatteredinterpolant all methods is based on triangulation of the data points. Even the data points are symmetric, the triangula...

8 mois il y a | 0

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Intersection condition between two ellipses
Use FSOLVE to find numerical solution. Only xaimum one can be found c1 = [0; 5]; % circle center #1 c2 = [-5; 2]; % circle c...

8 mois il y a | 0

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Intersection condition between two ellipses
Here is a solution for generic ellipses using FEX file here % Ti and ci define two ellipses E1 and E2 of the form % (x,y) st n...

8 mois il y a | 0

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find a zero of a two-variable function
If you are not unlucky Trajectory = @(x) sum(x.^2,2)-34^2-1; % Test function, use use rather own X0 = [9.609 , 32.288]; %ini...

11 mois il y a | 0

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call function name in the same function
This returns the name of the function being executed s = dbstack; funname = s(1).name; In recent MATLAB versions you can do i...

11 mois il y a | 1

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