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

circa 4 anni fa | 0

Risposto
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(...

circa 4 anni fa | 0

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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)...

circa 4 anni fa | 1

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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

circa 4 anni fa | 1

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Risposto
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...

circa 4 anni fa | 1

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Risposto
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

circa 4 anni fa | 0

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Risposto
Matlab Extracting X and Y coordinates
See here

circa 4 anni fa | 0

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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 ...

circa 4 anni fa | 0

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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...

circa 4 anni fa | 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...

circa 4 anni fa | 1

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Risposto
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...

circa 4 anni fa | 0

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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...

circa 4 anni fa | 1

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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 -...

circa 4 anni fa | 1

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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 =...

circa 4 anni fa | 0

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Risposto
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...

circa 4 anni fa | 0

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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...

circa 4 anni fa | 1

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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...

circa 4 anni fa | 0

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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...

circa 4 anni fa | 1

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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...

circa 4 anni fa | 0

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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)....

circa 4 anni fa | 0

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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...

circa 4 anni fa | 0

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Risposto
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...

circa 4 anni fa | 1

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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 ...

circa 4 anni fa | 0

Risposto
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 ...

circa 4 anni fa | 0

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Risposto
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...

circa 4 anni fa | 2

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Domanda

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...

circa 4 anni fa | 1 risposta | 1

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

circa 4 anni fa | 1

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Risposto
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...

circa 4 anni fa | 1

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Risposto
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...

circa 4 anni fa | 0

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Risposto
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)) ...

circa 4 anni fa | 0

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