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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...

mehr als 3 Jahre vor | 0

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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 ...

mehr als 3 Jahre vor | 1

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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...

mehr als 3 Jahre vor | 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 ...

mehr als 3 Jahre vor | 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)

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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...

mehr als 3 Jahre vor | 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'...

mehr als 3 Jahre vor | 0

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

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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...

mehr als 3 Jahre vor | 1

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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...

mehr als 3 Jahre vor | 1

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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 -...

mehr als 3 Jahre vor | 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 ...

mehr als 3 Jahre vor | 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

mehr als 3 Jahre vor | 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...

mehr als 3 Jahre vor | 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 ...

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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 ...

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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...

mehr als 3 Jahre vor | 0

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

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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...

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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...

mehr als 3 Jahre vor | 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-...

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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...

mehr als 3 Jahre vor | 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...

mehr als 3 Jahre vor | 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[...

mehr als 3 Jahre vor | 0

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

mehr als 3 Jahre vor | 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...

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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...

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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

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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...

mehr als 3 Jahre vor | 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...

mehr als 3 Jahre vor | 0