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How to fix my linear fit model?
This returns the piecewise linear function that is continuous at the break point. The correct break point is close to 18.6054 a...

16 Tage vor | 1

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strcmp gives a 0 while it should be a 1
Look more carefully: There is a 'c' before '49' in A but not in B

17 Tage vor | 0

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Basic FFT Question: What range to sample the function in.
" However I am under the impression that the fft should not be sensitive to this change. " Your expectation in incorrect When y...

21 Tage vor | 0

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getfield to get values from an entire struct array?
Create 1 x 3 struct array with field named 'afield' s = struct('afield', {11 12 13}) s(1) s(2) s(3) % Here is the command t...

21 Tage vor | 0

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express basis spline derivative in terms of interpolation values
x = [1 2 3 4 5]; y = randn(size(x)); k = 5; f = spapi(k,x,y); B = spapi(k,x,eye(length(x))); fdd = fnder(f, 2); Bdd = ...

22 Tage vor | 0

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Use MATLAB Coder to convert matlab code to mex without using multi-threading
https://www.mathworks.com/help/coder/ug/use-parallel-for-loops.html

24 Tage vor | 0

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How to get all possible combination With the total number of possible combination for "n" variables that can take different values
Checkout similar thread https://www.mathworks.com/matlabcentral/answers/476022-how-to-pick-up-all-combination-of-numbers-from-m...

25 Tage vor | 0

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Possible issues with solving iterative linear systems with mldivide
"Is there a way to see the matrix solver steps to see which expressions might have an issue?" No they are LAPACK/BLAS based cod...

25 Tage vor | 0

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Sparse matrix vector product returns null.
"What can cause this issue?" Nothing. What you claim likely would not happen. Unless if you show an example.

25 Tage vor | 0

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How to define if/else non linear constraint in an optimization problem
Simply solve three different optimization pbs with the three repectively constraints independently and ignore the two other, the...

25 Tage vor | 1

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How to use loop to fill in specific numbers?
T = combinations(1:4,1:8) % for alder release that does not support combinations [v1 v2] = meshgrid(1:4,1:8); v1 = v1(:); ...

25 Tage vor | 0

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Error With Least Squares Approximation
Few other recommendations beside what Torsen and John altrady told you: Lower the polynomial order, do not go above 7, But you ...

26 Tage vor | 0

Frage

ANY and ALL with NaN array
According to any documentation page, it " determines if any element is a nonzero number". OK to me NaN is nonzero number so I do...

28 Tage vor | 1 Antwort | 0

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Make histogram from multiple cells.
% Generate dummy test data C=arrayfun(@(varargin)randn(5+randi(20),24), 1:30, 'unif', 0); A=cell2mat(C(:)); % m x 24, like c...

29 Tage vor | 0

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My First Derivative is not correctly calculated in matlab
syms yApprox(X1) a0 a1 a2 a3 a4 a5 a6 yApprox = a0 + a1.*X1 + a2.*(X1).^2 + a3.*(X1).^3+ a4.*(X1).^4 + a5.*(X1).^5 + a6.*(X1).^...

29 Tage vor | 0

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for loop vectorization of De Boor algorithm
Old question, but I'll reply it for future readers that wonder how to tackle the same problem. I did a quick and dirdty vectori...

29 Tage vor | 0

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Increase plot speed in MATLAB
Try to look at animatedline command Also look at drawnow with or without limitedrate option, it somewhat has certain effect, ev...

etwa ein Monat vor | 0

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Error calculating inverse for matrix block of LU decomposition of a full row rank matrix
It's a little bit perturbant, but reading the lu doc I don't see why U1 must have the same rank than U (or A, meaning 100 on you...

etwa ein Monat vor | 0

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de boor bspline algorithm
A very late answer, but as I deal myself with de Boor algorithm I look what exists out there. If the question concerns the 3D a...

etwa ein Monat vor | 0

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For a repeated eigenvalue only one eigenvctor is being returned
Indeed in case of eigenvalue with multiplicity > 1; the problemie is numerical challenging and MATLAB might fail to find the cor...

etwa ein Monat vor | 0

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How "chol" and "qz" MATLAB algorithms are utilised in the "eig" MATLAB function?
See stage 3 described in https://netlib.org/lapack/lug/node56.html or somewhere in this file

etwa ein Monat vor | 0

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steps to convert spline from B-form to pp-form (fn2fm)
The pp-form stores the polynomial of each each subiterval, the variable is x := (t-ti) where ti is the left knot of interval #i....

etwa ein Monat vor | 0

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How to extract a matrix of values from cell array of cell arrays of structs
Generate data (Thanks Voss) n1 = 3; n2 = 4; mse = cell(1,n1); for ii = 1:n1 mse{ii} = cell(1,n2); % row vector for...

etwa 2 Monate vor | 0

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Where is dlfeval tracing information stored?
I don't kwow the dlarray class but IMO it looks like the creating function handle f is stored in some sort of private property i...

2 Monate vor | 0

Frage

Default rank revealing tolerance
In few MATLAB functions such as RANK, PINV, ORTH there is a parameter TOL. MATLAB uses the default value as % tol = max(size(A...

2 Monate vor | 0 Antworten | 1

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plot() and fplot() give different results for the same function
Your coding is wrong: Replace "/" with "./"

2 Monate vor | 0

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getting warning while using eigs on the matrices obtained from freefem++
Try to follow the suggestion you get " Consider specifying a perturbed numeric sigma value to improve the condition of the matri...

2 Monate vor | 0

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cubic spline interpolation - mixed boundary conditions possible?
In principle yes. The spline on the second segment (b,c) are piecewise cubic poynomials; starting from b sequentially to each in...

2 Monate vor | 0

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How to convert /map uint16 to int16 maintaining the dynamic range so that [0] and [2^16-1] in uint16 beomes [-2^15] and [2^15-1] without going through double
If you have C compiler this simple mex file will do the job: /*****************************************************************...

3 Monate vor | 1

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Faster/better conversion than using swapbytes typecast on udp byte datastream?
Try this: %% Exampel data data =[0 5 187 8 1 136 61 48 0 0 0 0 1 67 58 246 255 127 176 76 10 231 55 137 255 240 253 91 255 22...

3 Monate vor | 0

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