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Bruno Luong


Last seen: Today |  Active since 2009

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Answered
How to find a vector multiple times in an array?
A = [1 3 4]; %x,y,z-coordinates - vector B = [2 3 4; 1 3 4; 5 5 6; 3 4 6; 1 3 4]; %array % which row match find(ismember(B,...

ungefär 23 timmar ago | 1

Answered
Could anyone help me how to generate the matrix in the following manner as described below
hi=repelem((1:5)',100*(1:5)); r=ceil(rand(size(hi)).*hi)

2 dagar ago | 0

| accepted

Answered
Looking for a faster way of finding the first element larger than a given number in a sorted array
You might try k = discretize(r,b); if b(k) == r k = k+1; end

3 dagar ago | 0

Answered
How to calculate permutation powers
M= [ 1 2 3 4 5 6 7 8 9 10; 3 6 8 1 2 4 5 7 10 9] S=s...

4 dagar ago | 0

| accepted

Answered
Applying vectorization techniques to speedup the performance of dividing a 3D matrix by a 2D matrix
If you have C compilers the fatest methods are perhaps mmx and MultipleQR avaikable on FEX https://www.mathworks.com/matlabcent...

8 dagar ago | 1

Answered
Can I pass arguments to a @callbackFcn?
% Assuming operation,mode are defined % operation = ... % mode = ... configureCallback(s,"terminator",@(s,t) readSerialData(s...

8 dagar ago | 1

Answered
cell2mat too slow
Try cat(1, nodes.pose)

8 dagar ago | 0

| accepted

Answered
How can I call M fuctions in different thread in mex coding matlab and C++?
No you cannot. MATLAB will crash since many MATLAB functions are not thread safe.

10 dagar ago | 0

| accepted

Answered
How to quickly do Cholesky factorization for many small matrices?
It requires MEX, but it should be fast https://www.mathworks.com/matlabcentral/fileexchange/37515-mmx

14 dagar ago | 0

Answered
how to vectorize squared function
X=rand(3,10); Y=rand(4,10); L=rand(10); N=size(X,1); M=size(Y,1); XX=reshape(X,N,1,[]); YY=reshape(Y,1,M,[]); YX=reshap...

15 dagar ago | 0

Question


Trigger event for graphic handle object?
The function notify seems to be designed for user-define class. Is it possible to make it works on MATLAB graphic handle objects...

18 dagar ago | 0 answers | 1

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answers

Answered
Is it possible to make inactive some of lines?
Put "..." (without the quotes) in front of the lines you want to hide

29 dagar ago | 0

Answered
Return all ShortestPath explored nodes
This problem has been answered in this thread https://www.mathworks.com/matlabcentral/answers/494497-how-can-i-get-all-the-exi...

30 dagar ago | 0

Answered
How interp2 deal with edges on bicubic interpolation?
The boundary handling is descriibed in the section Boundary Condition of this Cubic interpolation reference Especially the equa...

30 dagar ago | 2

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Answered
splines with derivative conditions at support points
There is the option point-wise constraints (pntcond) of my FEX BSFK to achieve your goal.

ungefär en månad ago | 0

Answered
how to use threads in matlab app designer
Many MATLAB stock functions are not thread safe, they are not suitable for multi-thread run. This is MATLAB limitation one canno...

ungefär en månad ago | 0

Answered
Compiler Support for Intel® oneAPI Toolkits - Fortran
It works for me (C) you light be abe to adapt for fortran https://www.mathworks.com/matlabcentral/answers/678588-mex-how-to-mod...

ungefär en månad ago | 0

Submitted


FFT-based convolution
Discrete convolution using FFT method

ungefär 2 månader ago | 18 downloads |

Answered
How to generate random uint64 values
maxval = int64(2^60); n = 100; twop32 = 2^32; q = double(maxval/twop32); hi = floor(q*rand(1,n)); himax = floor(q); lom...

ungefär 2 månader ago | 0

Answered
How to generate random uint64 values
I can't see why you are reluctant to generate 2 x 4 bytes r = typecast(randi(intmax('uint32'),2*100,1,'uint32'),'uint64')

ungefär 2 månader ago | 1

Answered
Graph Laplacian and adjacency matrix
Not sure what data format you have, but for graph % TMW example s = [1 2 2 3 3 3 4 5 5 5 8 8 9]; t = [2 3 4 1 4 5 5 3 6 7 9 1...

ungefär 2 månader ago | 0

Submitted


find_idx
Fractional binning

ungefär 2 månader ago | 4 downloads |

Answered
Best practices to use Matlab assert
No C debug mode slows every statement down. ASSERT costs the overhead of checking whatever you instruct MATLAB to check. It ma...

2 månader ago | 0

Answered
Program to generate permutations in a certain order
clear X X{1}=[1 1 0 1]; X{2}=[1 0 1 0]; X{3}=[1 0 1 1]; X{4}=[1 1 1 0]; X{5}=[0 1 0 1]; X{6}=[0 0 0 1]; n=length(X); P...

2 månader ago | 1

Answered
Equivalent of c++'s NULL or python' s None in MATLAB
If you use recent MATLAB you can use also missing and ismissing

3 månader ago | 0

Question


How to change number precision with writestruct
The number of significant digits of writestruct is quite limited, as showed by this example s=struct('pi',pi); writestruct(s,...

3 månader ago | 1 answer | 0

1

answer

Answered
Replace nested loops with a matrix
i=2:nhx-1; j=2:nhy-1; U(i,j)= U(i,j)-dt*(Pc(i+1,j)-Pc(i-1,j))/(2*hx);

3 månader ago | 1

| accepted

Answered
Get indices of all rows containing a value - repeated or not
[c,~,J] = unique(sort(connections,2),'rows'); [i,~,I] = unique(c); [~,j] = ismember(i, id); xy = [x(j) y(j)]; I = reshape(I,...

3 månader ago | 0

| accepted

Answered
Is there a way to vectorise this vector/matrix product?
G = real(dot(W,R*W,1)).';

3 månader ago | 0

Answered
Relative Ranking of position in an array
I10=[1 2 1 1 1 2 1 1 2 2 1 3 6 3 1 3 3 1 4 3 4 3 2 3 4 2 3 3 4 2 7 4 6 2 5 4 5 5 5 5 6 7 5 4 5 8 8 6 4 5 4 6 6 7 9 7 7 2 7...

3 månader ago | 0

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