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Bruno Luong


Last seen: 10 days ago |  Active since 2009

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Answered
How to convert y data for equal intervals of x, z to z data for equal intervals of x, y
Rescaling is important when doing scatering interpolation. Avoid unstable extrapolation load example.mat XYZ = [X(:), Y(:), Z(...

11 days ago | 0

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Answered
UIContextMenu when defined does not show in Matlab 2021b
uiaxes/uifigure are not compatible wit axes/figure. I recommend simply do not make a switch.

11 days ago | 0

Answered
Unreadable UTF characters when they are loaded in MATLAB R2022b, but they could be readable in R2020b
It sounds like it related to the bug fix they carried out in 2021b, see @Stefanie Schwarz answer here; This breaks the encioding...

11 days ago | 0

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Answered
IFFT on symmetric spectral data giving complex result?
assert(isreal(singleSpectrum(1)), 'first element must be real'); twoSidedSpectrum = [singleSpectrum(1:end); flipud(conj(singl...

12 days ago | 1

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Answered
Format scientific decimal place bar plot
load('data_c.mat'); x = unique_stations'; vals = [means_ep; means_kzo]; b = bar(x,vals); set(gca,'yscale','log');grid on; bo...

13 days ago | 0

Answered
Standalone desktop application installer cannot be opened in other machines
Try to run with administrator right Correct Normally it would work like the base code with a fresh same version nMATLAB instal...

13 days ago | 0

Answered
Identify location of the 2D grid data
rectList = [... 1 1 1 1 1 2 1 1 1 3 1 1 1 5 1 1 2 1 1 1 2 2 1 1 2 5 1 1 3 2 1 1 3 3...

14 days ago | 0

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Answered
randomAffine3d is not properly random
This is not an answer but I puspose introduce a bug that generates the rotation axis in the positivve part oof S^2 and it repr...

15 days ago | 0

Answered
Compare probability density functions of 2 vectors
Use histcounts to compute pdfs then compare them

15 days ago | 1

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Answered
Moving the contour plot in 3D coordinate
Translation 15 unit in y after rotation Z = peaks; ax = axes(figure); HG = hgtransform(ax); Rx = makehgtform('xrotate',pi/2)...

16 days ago | 0

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Answered
Moving the contour plot in 3D coordinate
May be changing ZLocation property is what you need Z = peaks(); surf(Z); hold on contour(Z,'Linewidth',2,'ZLocation',26); ...

16 days ago | 0

Answered
rotation of 3D XYZ points by an ijk unit vector
% source and target unit vectors u = [0.9997; -0.0240; -0.0053] ; u = u/norm(u); v = [1; 0; 0]; v = v/norm(v); % Compute ...

17 days ago | 0

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Answered
Is there a way to write protect an m file.
You could transform mfile to pfile than depioy it. See pcode command

17 days ago | 0

Answered
Warning: Equation is badly conditioned. Remove repeated data points or try centering and scaling.
I don't use MATLAB native FIT, I can't get it works correctly to fit your data, even with smoothingspline model, and predictive ...

17 days ago | 0

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Answered
sweep of tensor products
Strictly speaking you do not compute a tensor product. c = 100; n = 5; l = 10; A = rand(c, n); B = rand(c, l); C = A .* ...

18 days ago | 0

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Answered
Quaternions with symbolic elements
Work around is use 2 x 2 (symboloc) complex matrix to do quaternion computation https://en.wikipedia.org/wiki/Quaternion#Matrix_...

18 days ago | 0

Answered
help counting number of times a value occurs across matrix
Alternative way of counting % Random test array A = round(10 + 2 * randn(3,10)) % Count #repetitions by row [value,~,J] = ...

18 days ago | 0

Answered
6x6 system of multivariate quadratic equations ... non-negative real solutions
Assuming the equations are x' * Ai * x + bi'*x + ci = 0 for i = 1,2, ..., N = 6. Ai are assumed to be symmetric. If not rep...

19 days ago | 0

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Answered
2D FFT Gaussian filtering exercise doesn't return what is expected
You made many short cuts and reasoning that are not right. The convolution formula you post is for continuous signal/surface, d...

20 days ago | 0

Answered
Fixing biased random number generation
% a_max .* rand(N, 1) is a product of 2 independent uniform variables, it is NOT a uniform random variable as you expect since...

20 days ago | 0

Answered
having if/else statement go to previous input
This is how I would do. It seems clearer to me. if opt == 3 opt = randi([1 2]); % randi(2) is also fine end if opt == 1 ...

21 days ago | 0

Answered
K Nested For Loops for arbitrary K
You can use this FEX if your number combinations % Q = nchoosek(1:N+K-1,K)-(0:K-1) is too large to fit into memory, e.g. for...

25 days ago | 0

Answered
K Nested For Loops for arbitrary K
No loop or no recursion is needed at all K = 4; phi_deg = -15:15; N = length(phi_deg); V = nchoosek(N+K-1,K); mat = zero...

26 days ago | 1

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Answered
Cholesky vs Eigs speed comparison?
Your test of PSD is not right. You should do: eigs(A,1, 'smallestreal') > smallpositivenumber % 'sr', 'sa' for older MATLAB EI...

29 days ago | 1

Answered
polyeig calculating few polynomial eigenvalue
I'm affraid there is no equivalent of EIGS to POLYEIG (vs EIG).

30 days ago | 0

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Answered
كيفية حذف الصف والأعمد في أمر واحد من المصفوفة
A = randi(9,5,6) rowremove = 3; colremove = 4; B = A(setdiff(1:end,rowremove),setdiff(1:end,colremove))

1 month ago | 2

Answered
Iam facing Below Issues While Compelling the model in Matlab 2021rb
-I"D:\Users\Sumanth\OCTOBER\ CFLAGS="$CFLAGS -w " It seems the second double quotes are wrongly placed

1 month ago | 0

Answered
Why are plot titles assigned differently in Windows and MacOS?
Regardless the platform, use graphic handles to be sure where the title (or any graphic object) correctly appears. As example f...

1 month ago | 1

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Answered
make the execution faster
Using ode45 is a better choice because it adapts the time step intelligently. On my laptop it lasts less the 4 seconds for tend...

1 month ago | 0

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

1 month ago | 0

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