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Is there a supported alternative to feature('numCores') to get the number of cores available for a parallel solution
What about: maxNumCompThreads()

presque 4 ans il y a | 0

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Sum(sum()) with optimization variable
What about this: L = reshape(1:size(x,3),1,1,[]) b = L >= t-pt_rj & L <= t; Constraint2 = sum(sum(b.*x,3),1) <= ones(1,size(...

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Optimization: Reuse calculations from objective function in nonlinear constraints function
You can use this design pattern function preciousvalue = expensivereuse(inputs) persistent lastresult if ~isempty(lastresult)...

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How to compare values in respective columns using "ismember"
use ismember on each column separately for j=1:size(A,2) A(:,j) = ismember(A(:,j),B(:,j)); end

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Intersection of two curves
Intersection of to things that are not comparable? why not? just avoid using it to conclude anything that matters. N = [1 2 3 4...

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Is it possible to specify the 'order' of a smoothing spline?
See if this can helps you https://www.mathworks.com/matlabcentral/fileexchange/25872-free-knot-spline-approximation

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Matlab Extracting X and Y coordinates
See here

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Natural Cubic Spline Interpolation
You made at least 2 mistakes: h is not computes Typo "x" instead of "X" The rest of the algorithm I didn't look at carefully ...

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Finding a propriate function to fit "U" curve
This is the best I come up with using BSFK FEX x=[0.17 0.33 0.83 1.67 2.5 3.33 5]; y=[6.62466 5.58235 4.63169 5.08213 5.4159 5...

presque 4 ans il y a | 0

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linprog ignores options, why?
Can you run with exitflag and output [x, fval, exitflag, output] = linprog( c, A, b, [], [], [], [], options ) and share them...

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Why does MATLAB differentiate between strings and character array data types?
strings is introduced recently and the behavior is not the same than char array, an historic class. So they create a new class t...

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Supplying gradient for the subset of parameters
May be you could provide the gradient interface for all, but compute the subset derivative analytically and the complement by fi...

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Matrix algebra AxB=C, I want to solve for B
You can't recover the "original" B, whatever it is, your system is underdetermined (much more unknowns - 1826 - than equations -...

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How can I assign zeros to a particular value in an expression
test function test N =4; u = (1:N); v = (N:2*N-2); function ui = getu(i) if i <= 0 | i >= 4 ui = 0; else ui =...

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How to find x value for a known y in array plot?
* x = linspace(-3,3); Assuming your data are monotonic on the neighborhood of the max y = exp(-x.^2); [maxy, imax] = max(y...

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pause() function is inaccurate
The accuracy is documented. "The accuracy of the pause function is subject to the scheduling resolution of your operating syste...

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Question about the fminsearch Algorithm
fminsearch is an mfile, you can copy it then mofify these lines #196 (R2022a) % Set up a simplex near the initial guess. % PUT...

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How to reduce the usage of "broadcast variables" when using parfor
You can use parallel constant to convert el, el_row1, ds, vmin to constant and reduce the data transfert, if they are not modifi...

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Concatenate arrays of different length inside loop
What's wrong with cell? vox_count_cell = cell(1, length(image_files)); for i = 1:length(image_files) header = spm_vol(ima...

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How do I implement multistart with lsqnonlin in my code?
"it returns the initial value" It indicates that the fit fails, not problem of wrong stating points (converge to local minima)....

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solve equation numerically 1=(1/y)x*exp(x*y)
Numercial solution y = 0.01:0.01:1; x = nan(size(y)); for k=1:length(y) yk = y(k); x(k) = fzero(@(x)x.*exp(x.*yk)-y...

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How can I find negative factorial ? (-0.5)!
There are actually different ways of extending factorial function, see here http://www.luschny.de/math/factorial/hadamard/Hadam...

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install standalone application on macOs, that was compiled on windows
" According to Matlab, I think it should be possible ( https://de.mathworks.com/help/compiler/install-deployed-application.html ...

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Remove all rows of an array based on a value in a column, and also remove all rows that have the same values as this row in other columns
M = [ 15.88 18.43 15.88 18.43 0 15.88 18.43 33.48 14.99 ...

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why is acumarray much slower calculating means than sum?
The default behavior of accumarray is sum and it's low-level coded. When you pass user-defined function MATLAB will call the fu...

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Question


reduction variables and evaluation order
This the doc on can read "A reduction variable accumulates a value that depends on all the iterations together, but is independ...

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Adding fields to a struct?
[PR1Data.filename] = deal(''); or if you PR1Data is non empty PR1Data(1).filename = '';

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Faster way to create a matrix of the unique() of each row of a matrix
% Test example A=randi(4,10,5) [m,n] = size(A); As=sort(A,2); b=[true(m,1),diff(As,1,2)>0]; R=repmat((1:m)',1,n); C=cums...

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How to create 3D matrix with empty cells
cell(3,3,3) % replace 3 with 300 for you I'm still afraid you'll be soon in trouble if you ask such question about easy data cr...

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Fit coefficients are equal (to starting points) in 3000 different fits
Can you do check whereas they are identical with this command after the loop isequal(Coefficients(:,10),Coefficients(:,2999)) ...

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