Community Profile

photo

Bruno Luong


Last seen: Today
1.634 total contributions since 2009

Bruno Luong's Badges

  • Personal Best Downloads Level 4
  • Editor's Pick
  • First Review
  • 5-Star Galaxy Level 5
  • First Submission
  • Revival Level 1
  • Thankful Level 2
  • Guiding Light
  • 6 Month Streak
  • Knowledgeable Level 4
  • First Answer
  • Speed Demon
  • Solver

View details...

Contributions in
View by

Answered
How to remove redundant elements in a sparse matrix?
E = triu(E);

ongeveer 21 uur ago | 1

Answered
Please help me vectorize my loop to construct query vector from sample points
xs=cumsum(ceil(10*rand(1,10))) t=pi; p=cumsum([0 ceil(diff(xs)/t)]); xq=interp1(p,xs,0:p(end))

1 dag ago | 0

| accepted

Answered
Non-convex shape as a collisionBox for robot path planning
The MATLAB probably use GJK algorithm that requires convex shape. You should split the object in sum of convex. I can recommend...

2 dagen ago | 0

Answered
Fast implementation of max-plus matrix multiplication
function C = mp_prod(A,B) m=size(A,1); n=size(B,2); AA=reshape(A,m,1,[]); BB=reshape(B.',1,n,[]); C=max(AA+BB,[],3); tic/t...

2 dagen ago | 2

Answered
Preallocating cells with unknown output size
If the size is not known, a good way is the to grow the preallocation array exponentially. Rather than the assigment X{i,j} =...

3 dagen ago | 0

| accepted

Answered
Size mismatch error on dimension 2: expected 1, but actual size is 3 (Matlab Coder)
Size of ones(SimCoreIn(k).Ns,SimCoreIn(k).Np) = 102 x 3 So (102 x 1).*(102 x 3) gives (102 x 3) right. Right but cod...

4 dagen ago | 0

| accepted

Answered
Why the sparse pattern of a sparse matrix changed
The mex probably creates a non-valid sparse matrix, use spok to check validity

4 dagen ago | 1

| accepted

Answered
continuous piecewise linear approximation of data set
see if this can help you https://www.mathworks.com/matlabcentral/fileexchange/25872-free-knot-spline-approximation

5 dagen ago | 0

Answered
App does not execute properly unless in debug mode [R2020b]
May be you should add drawnow so as things get refresed app.run.Enable='off' drawnow

5 dagen ago | 0

Answered
Calling script from a function is recommended?
Inconvenience: MATLAB coder cannot work on script inside function

5 dagen ago | 0

Question


Calling script from a function is recommended?
Now and then I call script from a function, the purspose is often initialize some constant values that are shared by across the ...

5 dagen ago | 2 answers | 0

2

answers

Answered
How to speed up this for loop containing kronecker product?
Yesterday I profile your code and the majority of time is eaten by H = K_D*K_D' - K_S*K_S'; not by Kronecker. The question is...

6 dagen ago | 0

Answered
svds(X,r) and svd(X,'econ') generating different singular vectors for large complex matrix X ??
The singular value (eigen) decomposition SVD/SVDS is not unique, vectors is up to scaling, (values is up to order for eigen valu...

6 dagen ago | 1

| accepted

Answered
How to find the first element in ascending numbers that repeat?
A = [1 2 3 4 0 1 0 1 0 1 0 1 2 3 4 0 1 0 1 0 1 1 2 3 4] b = find(A(1:end-1)==1 & diff(A)>0)

7 dagen ago | 0

Answered
Calculating a matrix with a specific form
There might be a better mehod, at least more geometric, than linear system solving. I understand you want to find m (3 x 1) suc...

7 dagen ago | 2

Answered
How to select complementary elements from a vector?
>> d(~ismember(d,I)) ans = 2 5 6 8 9 0

8 dagen ago | 0

Answered
Vectorization of Weighted Minkowski Distance
[n,m] = size(X); % do not use length Xi = reshape(X,[n,1,m]); Xj = reshape(X,[1,n,m]); tt = reshape(theta,[1,1,m]); Mat2 = s...

8 dagen ago | 0

| accepted

Answered
How to find the first number, ignore subsequent until a greater number repeats.
A = [ 0 3 0 3 0 3 0 3 0 4 0 4 0 4 0 4 0 5 0 5 0 5 0 5 0 5 0 3 0 3 0 3]: b = find(A==3); c = diff(b); b([1 find(c>c(1),1,'firs...

8 dagen ago | 1

| accepted

Answered
Assignment of variables by comma separated lists
Use deal >> A = struct('number', cell(1, 5)); >> A A = 1×5 struct array with fields: number >> n=1:5; >> c...

8 dagen ago | 0

Answered
High level question: use Matlab Compiler to integrate a function.m into C++ code
You need Compiler SDK to build shaed library Compiler alone can compile only to standalone app

8 dagen ago | 1

Answered
Mesh plot of the function sqrt(y-x^2)
Here is the surface in meshgrid form s = -1:0.01:1; y = 0:0.1:9; [S, Y] = meshgrid(s,y); X = S.*sqrt(Y); Z = sqrt(max(Y-X.^...

9 dagen ago | 0

Answered
Force constant slope in linear regression
% find intercept such that % y ~= givenslope*x + intercept % in the least squares sense intercept = mean(y - givenslope*x)

10 dagen ago | 0

Answered
Find random solutions of a system of inequalities
For small dimensions, you might use existing tools in FEX to enumerate the vertexes of the polytopes. If the domain is non boun...

10 dagen ago | 1

Answered
How do we change the maximum number of parallel cores without a visual interface?
flow.com/questions/25563906/how-can-i-change-numworkers-in-parallel-cluster-profile-when-matlab-starts

10 dagen ago | 1

| accepted

Answered
ranking the data in matrix and arrange them as per rank.
>> D=[1 2 3; 7 8 9; 4 5 6; 3 0 5]; E=[D sum(D')' ranks(sum(D')')] Unrecognized function or variable 'ranks'. Did you mean:...

11 dagen ago | 0

| accepted

Answered
How can I generate all possible combinations of a vector containing specific numbers in it?
J=nchoosek(1:8,3); [m,n]=size(J); I=repmat((1:m)',1,n); accumarray([I(:) J(:)],1)

12 dagen ago | 0

| accepted

Answered
3 equations 3 unknowns complex numbers
A\B

12 dagen ago | 0

| accepted

Answered
This error was detected while a MEX-file was running.
It simply means the MEX file is buggy.

12 dagen ago | 0

Answered
Why it is not possible to do array indexing directly after function that returns array?
There might be some syntax confusion that leads TMW not to do that. The issue is that the indexing and function argument both us...

12 dagen ago | 1

Question


What is the advantage of Help with web connection
It seems MATLAB help switch recently by default on "Web documentation" It kind of anoying where the doc is available locally. W...

12 dagen ago | 1 answer | 1

1

answer

Load more