Community Profile # Bruno Luong

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How to replace unique interval of columns in each row of a matrix with zero?
A1= [1 1 1 1 1 1 1 0 0 1 1 0 0 1 1 1 1 1 1 1 1 1 0 1 1...

1 giorno ago | 0

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All possible path between two points
allpath introduced in R2021a will do. For older release I posted a code here

3 giorni ago | 0

Is there a reason why row vectors are default in Matlab?
Beside an historical reason to me it seems it related to for the for-loop is designed to work For M a true matrix for v = M ...

4 giorni ago | 0

Script using parfor spawns way too many threads
It sounds count productive to cut off the low-level multi-thread and move it on you parfor loop. I rather split the parfor into...

6 giorni ago | 0

vertical or horizontal array random combination in single array
A={[12;13] ;[1,5] ;[5;6;7]; [1,3,5,4]}; B = cellfun(@(x) x(:), A, 'unif', 0); C = cat(1,B{:})

21 giorni ago | 0

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p is your order, A is the adjadcent matrix p = [8, 9, 10, 1, 2, 3, 4, 5, 6, 7]; Areorder = A(p,p)

24 giorni ago | 0

Question

Parallel pool on function that uses persistent variables
Obviously parallel computing cannot handle correctly persistent variable, as showed in this minima example. It seems when runin...

circa un mese ago | 2 answers | 0

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Difference between spline(x,y,xq) and interp1(x,y,xq,'spline')
spline is a MATLAB file that build the intermediate piecewise polynomial then evalutae it (in your case). INTERP1 call an inter...

circa un mese ago | 0

Growing eye matrix as per the size of eye
tril(repmat(eye(3),3))

circa un mese ago | 1

Delete all repeatation number
a = [1 2 2 3 2 4 5 6 7 8 6] [u,~,j]=unique(a); a(ismember(a,u(accumarray(j,1)>1)))=[]

circa un mese ago | 2

Dumb mistakes we make with MATLAB.
Use 'end' to index an empty array.

circa un mese ago | 0

Uniquetol which preserves the first occurance
Use the third inputs followed by accumarray % Dummy data n = 100; A = randi(10,1,n)+1e-12*rand(1,n) [~,~,J]=uniquetol(A); ...

circa un mese ago | 0

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Question

How to find which toolboxes are required for compiled standalone app?
My question is straightforward: Is there away to check which toolbox are required after mcc command. I can see the file requir...

circa un mese ago | 0 answers | 0

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How do I convert a non-normal distribution to an equivalent normal distribution?
You can almost always map a reasonable continuous random distribution to a normal one. If r follows some distribution law and y...

circa un mese ago | 1

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Obtaining the combinations of a vector array to satisfy lineal constrains.
See this thread (14 year ago) with simlar question, the technique using gcd can help to reduce the search https://groups.google...

circa un mese ago | 0

Is there an easy way to remove points from a signal which can be restored by interpolation
This Free knot spline FEX can acoomplish what you ask for.

circa un mese ago | 0

Preallocate variables with unkown size
You can compute exactly the size needed for your vectors A = G_orig.adjacency; A(inActive,:) = 0; m = nnz(A(:,inActive)); ph...

circa un mese ago | 0

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Reshape Nx1 struct with field of Mx1 elements to N*Mx1 vector
Something like B = cat(1,A.bar)

circa un mese ago | 0

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cumulative sum table over group
tableA = {"A" 1 0 3 ; "A" 1 2 3 ; "A" 1 3 3 ; "A" 2 0 2; "A" 2 2 ...

circa 2 mesi ago | 1

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Question

What means "MATLAB connector is not running"?
I have a GUI app that runs fine under MATLAB, however when compiled as standalone with MCC, I get a strange warning message "w...

circa 2 mesi ago | 1 answer | 0

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multi array vectorization problem (reformulated)
A = [ -0.8013 -0.4981; -0.2278 -0.9009]; t = 0:3; % eigen space [V,D]=eig(A,'vector'); D = reshape(D,1,[]); % compu...

circa 2 mesi ago | 2

Find differences in a set of points without a for loop
x = randi(10,3,1) d = abs(x - x.')

circa 2 mesi ago | 0

Rotate the coordinate system to align an existing plane with Y'Z' plane
Take a look at this thread and see if you can use it

circa 2 mesi ago | 0

replace matrix A with the values of another matrix B
A= cat(3, [ 0 0 1; 0 1 0; 0 1 1], ... [1 0 0, 0 0 0; 0 0 0], ... [0 1 ...

circa 2 mesi ago | 1

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Can anyone please vectorize the code I have?
There is nothing in your data to guess that Jout must have 14 elements, the last index > 0 is 13. J_org = [ 0 2 0 ...

circa 2 mesi ago | 0

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Variable f coeffficient depends on x for linprog
Solve 2 problems f= [0 f2]; x = linprog(f,A,b,Aeq,beq,lb1,up1); with lb1 = -inf(size(x)), up1 = zeros(size(x)); g= [50 f2]; ...

2 mesi ago | 0

Computing Euclidean distance between 2 points
For a row vector d % sum(d.^2) is equal to % d*d' Example d=randi(10,1,3) sum(d.^2) d*d'

2 mesi ago | 1

Standalone compiled with Matlab compiler doesn't work
Have you include PSD_FSE3D.xml in the packaging? Do you take into account the path of the file is different when you run in sta...

2 mesi ago | 0

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