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How to convert a text file into a table properly
T = readtable('test.txt', 'Delimiter', '-->') for i=1:size(T,1) for j=2:size(T,2) T{i, j}{1} = str2num(T{i, j}{1}...

17 days ago | 0

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ga optimization changing answer
GA need random initialization of population and it also involves random processing in generating children. Therefore, the resul...

17 days ago | 0

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How to make a Comparison of the values of a matrix for different iteration ?
A=randi([2 5],[3,4]) j=10 for i=1:j B=A.*randi([2 5] ,[3,4]); % Do your comparison here between B and A %...

17 days ago | 0

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Calculate peak of pulses above certain threshold
load example.mat %whos plot(C(19e5:20e5)); % compute envelope before findpeaks env = envelope(C, 1000, 'peak'); hold on ...

17 days ago | 0

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Dividing matrices of different dimensions
B = reshape(1:64, 8, 8); % generate B matrix A = repmat(B, [32 32]); % repeating 32x32 imagesc(A)

18 days ago | 0

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How do you plot the average of a group of lines in a figure?
h = openfig("Damping_mode_2.fig", "visible"); hl = findobj(h, 'Type', 'Legend'); hl.Location = 'southoutside'; hl.NumColumns =...

18 days ago | 0

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How to generate 3D surface from 2D graph
a = (0:0.1:2.4)'; theta = 0:360; c= sqrt(a.^2+4); p = 23e-7./(c.^6); pp = repmat(p', [length(theta) 1]); [aa, tt] =...

18 days ago | 0

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Asign subjects to groups and get a group average
% 3 Variables - Subject ID (N = 1026) , Group ID (Total of 457 groups) and IQ score (one for each subject). N = 1026; id = ran...

18 days ago | 0

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Answered
Create an array in workspace from multiple files
unzip("kx values.zip"); filenames = dir('*.txt'); filenames = sort({filenames.name}'); nfiles = length(filenames); nfiles = ...

19 days ago | 0

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How to plot multiple plots
theta_all = [0.1095, 0.1075, 0.1075, 0.1055]; for theta=theta_all YF=0.0667; alpha= 0.29; beta= 0.68; gamm...

19 days ago | 0

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Intergrating from negative infinity to infinity
The following correct the syntax error in your original program. You need to check/debug the function definition to ensure it i...

19 days ago | 0

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How to find first negative solution with the bisection method
g = @(x) x + 1 -2 * sin(pi*x) ; % Use interval [-1.5, 0] for example [c, n, err] = Bisection_method(g, -1.5, 0, 1e-6, 1000) ...

20 days ago | 0

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Create a right axis which correspond to the first axis.
freq = [1000:10:5000]; wn = [-1.5:0.01:1.5]; p = 1./freq; h1= axes; data = randn(length(freq), length(wn)); imagesc(wn, f...

20 days ago | 0

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How to name files in a folder based on parent folder?
for i=1:6 % 6 folders foldername = sprintf('simulation_data%d', i) mkdir(foldername) cd(foldername) ...

20 days ago | 1

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Cut off frequency doesn't works.
Fs=200e3; Ts=1/Fs; t=0:Ts:(5e-3-Ts); y=5*sin(2*pi*1000*t)+5*sin(2*pi*20000*t)+10*sin(2*pi*30000*t); nfft=length(y); nfft2...

23 days ago | 0

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Plot the graph using non linear equation
It seems that you are solve equations of h for different parameters theta. You can solve the equation one by one. Don't add sp...

23 days ago | 0

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Runga-Kutta Method for system of first order differential equations
Looks like you need to choose a much smaller step size for the problem. %% Initialization tspan = 100; h = 0.125/50; fact = ...

23 days ago | 0

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Extract data above threshold from groups
load('xydata.mat') edges = (min(pp):20:max(pp)); [N, edges, bin] = histcounts(pp, edges); figure gscatter(pp,cc,bin) ...

24 days ago | 0

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subplot with for loop after 10 new figure
for i=1:100 % any number if rem(i-1, 10) == 0 figure; end sgtitle('WSPL zeitlicher Verlauf Modell D Te...

24 days ago | 0

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How to check if my array is square with if and else loops?
A = [1 -2 1; 0 2 -8; -4 5 9] if ndims(A)==2 && (size(A,1)==size(A,2)) disp("A is Square") end

24 days ago | 0

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Showing legend even if data is not there
a=(1:1:9)'; a=reshape(a,3,[]); b=sin(a); c=cos(a); scatter(a,b,'.','DisplayName', 'sin') hold on scatter(a,c,'.','Displa...

24 days ago | 0

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Answered
Cell in table data type conversion
a = (1:3)'; b = {'yes', 'no', 'yes'}'; t = table(a,b) t.b = categorical(t.b)=='yes'

24 days ago | 0

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How can I create a new matrix which stores the diagonals, but it first starts with a matrix full of zeros?
% start with zero matrix n=3; a = zeros(3) % random entries along diagonal a(1:n+1:n*n) = randi(100, [n 1]) % alternative...

24 days ago | 0

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Answered
Which is my mistake?
N = 60; n = 0:N-1; b = [0.18 0.1 0.3 0.1 0.18]; a = [1 -1.15 1.5 -0.7 0.25]; %d = delta(n(19n), 0 , n(end)); d = zeros(size...

30 days ago | 0

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How can I display text on pcolor map like in the image below?
L = membrane(1, 100); s=pcolor(L); s.EdgeColor='none'; set(gca, 'YDir', 'reverse') xl = xlim; yl = ylim; n = 1; xy =[]; ...

1 month ago | 0

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How to change the values of the corners in a matrix
a= zeros(10, 10); % smaller matrix for easy display % for corners a([1 end], [1 end]) = 1; a

1 month ago | 0

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Why does my code slow down around the 20th iteration?
The recursive function is the culprit of the speed. Simply replace them with mean and var. A_set = []; n=1; while 1==1 %eval...

1 month ago | 0

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Answered
Plotting with bisection method
Bisection method tries to find solution in a given interval. Generally, you don't know how many roots a non-linear equation has...

1 month ago | 0

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Name table columns with variable index
tab = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/980210/MATWORKS.csv'); head(tab) varnames = ta...

1 month ago | 0

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How to save results in a file without overwritting previous results????
Use append option when you save the data to files. [You can also use low-level fopen with option 'a+' for appending] % create ...

1 month ago | 0