Answered
Generate random numbers with truncated Pareto distribution
According the https://en.wikipedia.org/wiki/Pareto_distribution the pareto has bounded on the lower side by what they called xm...

3 years ago | 0

Answered
inpolygon usage with big matrices or faster function
Try this https://fr.mathworks.com/matlabcentral/fileexchange/27840-2d-polygon-interior-detection?s_tid=srchtitle At some point ...

3 years ago | 1

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Answered
2 vectors compare it
A=[2 3 4 5 10 7 15 9 16 12 17 18 19 20]; [As,is] = sort(A(:)); col = 1 + (is>size(A,1...

3 years ago | 0

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fminunc : A VERY STRANGE PROBLEM!
Just shooting in the dark here and wonder if you let the UseParallel option of fminunc to true or false? It could be that the ...

3 years ago | 0

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Can we Generate a Random Matrix with No Repeated Elements
Just the reshape long vector returned by randperm m = 3; n = 2; A = reshape(randperm(10,m*n), m, n)

3 years ago | 0

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Answered
How to rank 3d matrix across 2 dimensions
iNames(VarSORT); won't change iNames, you need to assign the expression to a variable VarsRank iVars = zeros(361,181,5); iVa...

3 years ago | 0

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Efficient construction of positive and negative matrix
If your B is given then the 2nd method in this script is faster P = [1 3 8 18]; N = 20; B = fliplr(dec2bin((1:2^N)-1,N)-'0'...

3 years ago | 0

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Optimoptions - Invalid solver specified error
Check if you have license and installed optimization toolbox by typing ver

3 years ago | 1

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Answered
Matrix Product optimization with Bsxfun
You simply cannot invent something that does not exist (support) in MATLAB, the function mtimes is not supported by bsxfun see f...

3 years ago | 1

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Answered
how to flip a function
f = @(x) x.^3; ivf = @(y) y.^(1/3); g = @(x)x; ivg = @(y) y; a = 0; b =1; fplot(f, [a, b]), hold on fplot(g, [a, b], 'Li...

3 years ago | 1

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Answered
How to create a second command window in my GUI?
Just let the main GUI (with welcome message and push button) to launch another MATLAB session system('matlab -r ...') with -...

3 years ago | 0

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Matlab Mex File with OpenMP compiling and showing active threads but not actually using them
A little bit late reply. I believe the main reason is there is a problem in your code, not in the compilation option. because ...

3 years ago | 0

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How can I approximate this large matrix?
What about T = M; niter = 5: for k=1:niter T = M*(speye(size(M)) + T); end This returns T = M + M^2 + .... + M^6

3 years ago | 1

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Warning: Matrix is singular, close to singular or badly scaled. Results may be inaccurate. RCOND = NaN
Replace ^2 by .^2 (with the dot) in fe if you want to square element wise. There migjt be some other operation like * or / that...

3 years ago | 0

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Contradictory results in command window with variable class and ischar function?
class structure(8).timetotemp is like class('structure(8).timetotemp') which return char. The correct function syntax call ...

3 years ago | 1

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Answered
How to speed up MEX function?
Last experience, Time with C OpenMP, Intel Parallel Studio XE 2022 CIntel_elapsed_time = 0.0574 [sec] 2.5 faster than MATLAB ...

3 years ago | 1

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Answered
Using ismembertol for multiple coincidences
Using ismembertol is inappropriate A = [5 3 4 2]; B = [2 4 4 4 6 8]; tol = 1; [ib,ia]=find(B'<=A+tol & B'>=A-tol); c = a...

3 years ago | 0

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Answered
equally spaced nodes and chebyshev nodes matlab
I have just answered another fellow here

3 years ago | 0

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Matrix column updation via optimization
Using Housholder transformation, B is uniquely determined only for n=3. I claim that my code solve the problem of argmin(norm...

3 years ago | 0

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Answered
How to check if two planes intersect with each other?
Use this FEX https://fr.mathworks.com/matlabcentral/fileexchange/49160-fast-mesh-mesh-intersection-using-ray-tri-intersection-wi...

3 years ago | 0

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non-uniform symmetric grid in 1D
The chebychev nodes cross my mind leftbnd=-10 rightbnd = 10; n = 30 chebychevgrid=@(leftbnd,rightbnd,n)leftbnd+((rightbnd-...

3 years ago | 0

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Answered
griddata vs griddedinterpolant vs scatteredInterpolant for given data
gridded data interpolant (A set of points that are axis-aligned and ordered, generated by meshgrid/ndgrid on monotonic grid vect...

3 years ago | 1

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Renaming the fields of structure
for i = 1:10 % 1:n filename = sprintf('file%d', i); s = load([filename '.mat']); fieldname = filename; s.(fi...

3 years ago | 0

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How to speed up MEX function?
I don't know well C++, but I have practiced quite a lot mex C. It looks like this statement just move a bunch of data outputs[...

3 years ago | 0

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Efficient way to reshape data
This avoids inner transposition permute(reshape(data,2,[],3),[1 3 2])

3 years ago | 1

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Sparse matrix from the columns of an initial square matrix
n=3;m=2; A=randi(10,n,m) % m columns are used; not n J=(1:m*n); I=mod(J-1,n)+1; B = sparse(I, J, A) C = full(B) % if f...

3 years ago | 0

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Answered
Execute same .m multiples times in parallel
You have to wrap your script in function and then call parfor if you have parallel toolbox. Please read about precautions of se...

3 years ago | 1

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Answered
What limitations does MATLAB have in pseudo-random sequence generation ?
According to this page, the period of Mersenne Twister (64 bit version, the default engine used by rand()) method is 2^19937-1

3 years ago | 1

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Answered
Finding cluster of positive and negative numbers in an array, then the maximum and minimum value in each cluster
NOTE: max of [-3 -2] is -2 not -3. Your array has 17 elements, cannot have element index of 18. a = [ 2 -2 1 4 5 -3 -2 1 -1 2 5...

3 years ago | 0

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how to make a matrix only showing Permutation without order ?
This is called combination with repetition You don't need to generate the permutation and filter out which can take much larger...

3 years ago | 0