Beantwortet
How to pass a Matlab function handle to C-Mex Code
Rather than using function handle, call MATLAB with function name using mexCallMATLAB

etwa ein Jahr vor | 0

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

etwa ein Jahr vor | 0

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Beantwortet
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 ...

etwa ein Jahr vor | 1

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Beantwortet
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...

etwa ein Jahr vor | 1

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Beantwortet
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

etwa ein Jahr vor | 0

Beantwortet
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]; [...

etwa ein Jahr vor | 0

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

etwa ein Jahr vor | 0

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Beantwortet
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...

etwa ein Jahr vor | 0

Beantwortet
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...

etwa ein Jahr vor | 0

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Beantwortet
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 ...

etwa ein Jahr vor | 0

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

etwa ein Jahr vor | 1

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

etwa ein Jahr vor | 0

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Beantwortet
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...

etwa ein Jahr vor | 2

Beantwortet
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)...

etwa ein Jahr vor | 0

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

etwa ein Jahr vor | 3

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Beantwortet
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...

etwa ein Jahr vor | 0

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Frage

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...

etwa ein Jahr vor | 1 Antwort | 0

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Antwort

Beantwortet
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...

mehr als ein Jahr vor | 3

Beantwortet
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...

mehr als ein Jahr vor | 2

Beantwortet
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...

mehr als ein Jahr vor | 0

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

mehr als ein Jahr vor | 0

Beantwortet
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...

mehr als ein Jahr vor | 1

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Beantwortet
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...

mehr als ein Jahr vor | 0

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Frage

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...

mehr als ein Jahr vor | 3 Antworten | 2

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Beantwortet
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...

mehr als ein Jahr vor | 1

Beantwortet
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:...

mehr als ein Jahr vor | 0

Beantwortet
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...

mehr als ein Jahr vor | 0

Beantwortet
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...

mehr als ein Jahr vor | 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...

mehr als ein Jahr vor | 0

Beantwortet
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...

mehr als ein Jahr vor | 0