Answered
Best Practice: Many Functions relying on Global Variables?
May be a little cumbersome but for serious application and when I'm not lazy, I define a subclass UniversalParameterClass of Sin...

17 dagar ago | 1

Answered
Find a number and range of group of the same number
A= [1 1 1 1 1 1 1 2 2 2 2 3 3 3 3 1 1 2 2 1 1 3 3 3 3 3 1 1 1 2 2 2 ]; [u,~,G]=unique(A); n = length(u); for g=1:n i = f...

18 dagar ago | 0

Answered
How to fit a data to a model without using Statistical Toolbox?
Polynomial fits can be done with linear algebra, no fminsearch is required, but yeah clearly the model cannot fit data with thre...

18 dagar ago | 2

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Null space solutions in the presence of noise
You can call [x_lsq ,a] = eigs(@(x) (S'*S)\x, size(S,2), 1, 'smallestabs') where S is your (sparse) matrix sqrt(a) is the sma...

18 dagar ago | 0

Answered
problem with scatteredInterpolant: are there any limits?
You'll have problem anyway since your data is not centered and especially not normalize. x range is 130 and y range is 1155688,...

18 dagar ago | 1

Answered
Solving an implicit equation in matlab
D=1/(V-b) is a root of fifth order polynomial, where the coefficients depend on P, T, etc... It looks like it is small non-line...

18 dagar ago | 0

Answered
Solving an implicit equation in matlab
The numerical answer is -0.284179329144572 format long -(17211847986098922057056496272843303410021431145154622943954950247403...

18 dagar ago | 0

Answered
Creating curved alpha hull, similar to R-package
Just plot the boundary as concave. Some time it doesn't work since the vert returned are not in order, I don't know why and coul...

18 dagar ago | 1

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Is it possible to find the limit as a function approaches a complex number?
If seem that what you want can be derived from the the Laurent series of G about p_i I have no idea if Matlab symbolc can compu...

19 dagar ago | 1

Answered
How do I calculate the correlation between the rows two large matrices?
Just use the formula of correlation % Fake data for testing A = rand(10,5); B = rand(10,5); Ac = A - mean(A,2); Bc = B - ...

19 dagar ago | 0

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Answered
How to generate uniformly distributed points inside the volume of frustrum with base radius R and tip radius r and with a height of h.
Here we go r = 1; R = 2; % must be > r h = 3; if R <= r error('Non valid parameter') end Zmin = r*h/(R-r); % Posi...

20 dagar ago | 0

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Answered
solving nonlinear equation including max function
The dumb method (buts surely reliable and give all possible solution) is to assume one of the 4 combinations rhs max in (1) is ...

21 dagar ago | 0

Answered
While loop not breaking even though condition is met.
Just guessing; Might be it breaks but your function is entered again or there are many instances of function in queue, log more ...

21 dagar ago | 1

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Answered
Applying boundary conditions on a cubic spline interpolation
You can use my function spline1d available here https://fr.mathworks.com/matlabcentral/fileexchange/24996-spline-derivative?s_ti...

22 dagar ago | 0

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...

22 dagar 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 ...

22 dagar ago | 0

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Answered
Comparing between and within columns of matrix
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...

22 dagar ago | 0

Answered
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 ...

24 dagar ago | 0

Answered
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)

24 dagar 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...

24 dagar ago | 0

Answered
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'...

25 dagar ago | 0

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

25 dagar ago | 0

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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...

27 dagar 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...

27 dagar 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 -...

28 dagar ago | 0

Answered
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 ...

28 dagar ago | 0

Answered
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

28 dagar ago | 1

Answered
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...

28 dagar ago | 0

Answered
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 ...

28 dagar 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 ...

29 dagar ago | 1

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