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How to put non repeated elements of a symmetric matrix in a row vector?
You have hidden an index in the name of the variables. This was a bad idea. It is time to re-organize your data. Are all these ...

alrededor de 3 años hace | 1

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can we share our original code here,?
The FileExchange is a suiting location for sharing code, while the Answers forum is not. Plagiarism does only occur, if the cop...

alrededor de 3 años hace | 0

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how to plot subfigures in one figure like this image?
subplot calls axes with specific 'Position' proerpties inside. You can do this directly also. ax1 = axes('NextPlot', 'add', 'Vi...

alrededor de 3 años hace | 0

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why two function in separate m.file not in one ?
If you need a function inside another one only, you can store it in the same M-file. If other function should have access to the...

alrededor de 3 años hace | 0

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Setup alias command in Windows.
As far as I understand, Matlab does not run in the command shell under Windows. Maybe the -batch or -wait flags are useful. See...

alrededor de 3 años hace | 0

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How to create function handle using random output
Maybe: maximand = @(x) f([p_bar, q_bar, r_bar, x(randperm(3, 3))])

alrededor de 3 años hace | 0

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use two indexes at the same time in a for loop
for i = 4:5 & k = 1:2 This is pure guessing. While some human can understand, what you want, if you apply such trivks inspo...

alrededor de 3 años hace | 1

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How do I add a left/right axis to a plot in matlab 2013a
You find several corresponding FileExchange submissions: https://www.mathworks.com/matlabcentral/fileexchange?q=plotyy plotyy ...

alrededor de 3 años hace | 0

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WindowButtonMotionFCN callback slow down the application
Try if rejecting repeated calls solve the delay. See e.g. https://www.mathworks.com/matlabcentral/answers/570829-slow-sizechange...

alrededor de 3 años hace | 0

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how to do break the program written in script file and execute
Breakpoints are a good idea: Simply click on the bar on the left side of the editor. You will see a red dot occurring there. Mat...

alrededor de 3 años hace | 0

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Image processing of a binary image
w = 300; % Image size bigR = 140; smallR = 15; wantN = 40; % Number of small circles N = 0; center = zeros(...

alrededor de 3 años hace | 0

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How can I get a variable that starts in t=0?
y(1, 1) = 500; % Set initial value before the loop for t = 1:249 % y(1, :) is defined already, so start at t=1, not t=0 ...

alrededor de 3 años hace | 1

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Most practical way to speed up calculations?
I've seen many examples in the forum, where the old and fundamental method of vectorization slows down the execution compared to...

alrededor de 3 años hace | 0

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How to create 4D array of images
Maybe this is enough: List = dir('C:\ParentOf_A_B_C', '**', '*.gif'); Array = []; for k = 1:numel(List) img = imread(fu...

alrededor de 3 años hace | 0

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How to perform derivative of a random signal without finite difference schemes?
You can try a Savitzky-Golay-Derivative filtering: https://www.mathworks.com/matlabcentral/fileexchange/30299-savitzky-golay-smo...

alrededor de 3 años hace | 0

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fprint f for a matrix
x = [0 3 0; 1 2 3]; c = sprintfc('%g', x.'); c(x.' == 0) = {''}; fprintf('\t%s\t%s\t%s\n', c{:}) % Or: s = compose("%g",...

alrededor de 3 años hace | 0

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How can I reuse numerical values them back as inputs?
Working with functions is the way to go. You cannot use Matlab efficiently without functions. But as far as I understand, your ...

alrededor de 3 años hace | 0

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Can I access local functions for unit testing
You can call subfunctions only from their main function. This impedes a unit-testing. But the main function can provide a functi...

alrededor de 3 años hace | 0

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why do I receive not enough input arguments
signal_avg_limt "(Dec20-1(cut4&2)_filter, 50, 094167" This calls the function with 1 argument: a string. I guess you mean this ...

alrededor de 3 años hace | 0

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Truncate strings to maximum length
Omit arrayfun: str = ["ab", "cdefg"]; extractBefore(str, min(4, str.strlength())+1) If this still looks to clumsy, write your...

alrededor de 3 años hace | 1

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How to share relatively large data among GUI callbacks?
50 MB is not a large array in times of Gigabytes of RAM. Sharing an array by guidata does not create deep copies, but Matlab use...

alrededor de 3 años hace | 0

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In what way is the new R2021b Editor UI "improved"?
I still miss the editor option existing inMatlab 6.5, which allowed to provide the selected text as input to functions defined b...

alrededor de 3 años hace | 0

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Decode a base64 code into a audio file and save it
Look into the output of the base64 decoding. You find these characters on the top: .E...B...B...B...B...B.. webmB...B....

alrededor de 3 años hace | 1

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Sort producing inconsistent results when re-ordering legend
lines = sort(findobj(gca,'type','Line')) This is a bad idea. findobj replies the handles to the line objects. To feed sort with...

alrededor de 3 años hace | 0

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How shift output of array
If the transformation should be linear, this is a multiplication: a = [-1, 1] b = a * pi But "[-1 -0.5 0 0.5 1] -----> [-p...

alrededor de 3 años hace | 0

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How to write ASCII characters corresponding to decimal numbers into a file?
This writes the character 'A' at the current file position: n = 65; fwrite(fid, n, 'char')

alrededor de 3 años hace | 0

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For loop to delete rows from matrix
M = randi([0, 5], 10000, 5); % Some test data P = M(M(:, 2) == 3, :); % Keep only rows, which have a 3 in 2nd column % ...

alrededor de 3 años hace | 0

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pass a struct through a loop to extract data and have the i in the loop added to the name
The best idea is to use an index as index: accuracy_totals(1).accuracy_total(i) Arrays are smarter than a pile of fields with ...

alrededor de 3 años hace | 1

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CELL2MAT does not support cell arrays containing cell arrays or objects
table2struct(direc); This line converts the table direc to a struct, but ignores the result. In consequence this line has no ef...

alrededor de 3 años hace | 0

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What is the most efficient way to "reverse" interpolate a 3D array?
Creating the grid matrices is not useful. The interpolation is about 10 times faster using the original vectors. % Omit: % [b...

alrededor de 3 años hace | 0

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