Pregunta

R2022B Update4 is not offered
Is it just me or the update 4 is not offered via the menu Help => Check for Updates I'm using Update 3

más de 3 años hace | 5 respuestas | 0

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respuestas

Respondida
Finding the length of the longest continuous streak of a same number for each row of a matrix
p = 3; q = 10; r = 2; A = sort(randi(10,p,q,r,'uint16'),2) B = reshape(permute(A,[2 1 3]),q,[]); t = true(1,width(B)); [...

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Is this a mistake in documentation or my misunderstanding of FFT?
"Single sided Amplitude spectrum from Double sided spectrum it is only the DC component to be excluded from multiplying by 2" N...

más de 3 años hace | 0

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Respondida
How to encrypt compilation files for standalone?
The MATLAB source files are already encrypted (with you compile with MATLAB compiler, MCC)

más de 3 años hace | 1

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movavg with custom type and weights
movavg requires first array is a column vector or matrix A = 1:5; B = [0.5 0.5]; movavg(A(:), "custom", B) % or reshape back...

más de 3 años hace | 2

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Effect of zero padding on FFT amplitude
If your (windowed) signal dies out to 0 in a smooth way then the padding with 0s on the tail changes little to the FFT spectrum ...

más de 3 años hace | 3

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how can I write this in a compact form? can anyone suggest a single line code for it
n = 8; ismember(mod((1:n)-(1:n)',n),[1 n-1])

más de 3 años hace | 1

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Hi. How I can write this formula with Matlab code?
n=10; psi=rand(1,n-2); chi = 0; for k=1:n-2 i = nchoosek(1:n-2,k); j = 1:k; l = k+1-j; il = i(:,l); ...

más de 3 años hace | 0

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How to calculate the entropy of a portion of image as in the following formula?
Please try this A=imread('ngc6543a.jpg');; A=double(A(1:500,:,:)); A=sum(A,3); M = 11; N = 11; % Build 8-neighbor [di,...

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How to generate random number from Bernoulli distribution?
p = 0.25 X = double(rand(1,1000) < p) histogram(X,'Normalization','pdf')

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Interp1 is not woking
Extrapolation is notoriously unstable. So there is no surprise here. v1r = -0.01:0.00001:0 f1r = interp1(v1, f1, v1r, 'spline'...

más de 3 años hace | 0

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all integer possibilities for equations
@Ravindra Pawar Replace eqt 2 to eqt 1 to remove one variable, you can solve it with gcd or more generally see this oldthread h...

más de 3 años hace | 1

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how to remove noise from curves and take their derivates
I would chose spline fitting rather than polynomial (bad) or rational. Look at the shape of your data, I doubt any simple analy...

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How to convert matrices of different sizes in a for loop into a single column vector?
... PhaseC = cell(1, nLevels); for k = 1:nLevels ... Phase = acos(subband./amp); PhaseC{k} = Phase(:); end Ph...

más de 3 años hace | 0

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How to sort minimum value from a matrix
See matchpairs function number = 6; A = 1+10*(rand(number,2)); B = [4,8; 6,8; 8,8; 6,6.7; 6,5.4; 6,4.1]; % Calculate all dis...

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Faster alternative to polyxpoly
I would add my own BLU_polyxpoly which derived from here https://fr.mathworks.com/matlabcentral/fileexchange/27673-2d-polygon-ed...

más de 3 años hace | 0

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Where is the code of a Matlab Object?
which comm.LinearEqualizer If it's mfile contains source code then you can see it.

más de 3 años hace | 1

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How can I find the filter bandwidth of Savitzky-Golay filtering?
sa-golay filter is just non-causal FIR filter, where the coefficients are computed as following order=3;framelength=11; B = sg...

más de 3 años hace | 1

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Multiplication of matrix and first dimension of a 3-D array without for loops
A = rand(4,4); B = rand(4,10,5); % orginal code for i = 1:10 for j = 1:5 C(:,i,j) = A(:,:)*B(:,i,j); end en...

más de 3 años hace | 1

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How to represent [airfoil] coordinates as a polynomial
You could use the free-knot spline xy = [0 0 0.00369000000000000 0.0134500000000000 0.0170200000000000 0.028070000000...

más de 3 años hace | 0

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Set unintentionally triggers uitable callback
I use uistyle to change the background, AFAIK it doesn't trigger callback unlike set()

más de 3 años hace | 0

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How to create all possible matrices of zeros and ones without having more than one '1' in the same column?
m = 2; n = 3; c = cell(1,n); [c{:}] = ndgrid(1:m); i = reshape(cat(n+1,c{:}),[],n); [j,k] = meshgrid(1:n,1:size(i,1)); X...

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Respondida
How to generate code in MATLAB for randomly oriented short fibers?
See if this FEX can help you

más de 3 años hace | 0

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Does MATLAB support Intel i9-12900k CPU and Nvidia A100 GPU?
I don't know what you want to know, but here is the bench result (R2022b) on my Laptop, with this Alder Lake CPU: 12th Gen Intel...

más de 3 años hace | 1

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How to simplify the for loop for 3D matrix?
load('A.mat'); load('s1.mat'); load('s2.mat'); [m,n,p] = size(s1); % s = [reshape(s1, [m,1,n,p]), reshape(s2, [m,1,n,p]...

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Respondida
is Matlab code a lot faster than Excel formulas?
Impossible to answer with such fuzzy question; the time depends on your hardware, your matlab version, your licences to acess to...

más de 3 años hace | 1

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generate two variable from distribution without same result
Warranty never repeated pairs lA = 0; uA = 5; % lower upper bound of A lB = -4; uB = 4; % and B n = 50; % ...

más de 3 años hace | 0

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How to adjust a curve fit such that it goes through a specific point
Add blue point as additional data point and associate it a strong weight to the rest (see Weights of options)

más de 3 años hace | 0

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Fast way of computing all possible products of n matrices
The more I try my idea, the more Matt's solution seem amazing to me. Here is an algorithm that that build a set of product of a...

más de 3 años hace | 1

Respondida
Why is pause function so inaccurate on Windows?
The reason is that Windows task scheduler resolution is the order of 15 ms in some recent versions. I create some C mex and cal...

más de 3 años hace | 1