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How to find the zero vaue of a plot?
X=[0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20]; Y=[-0.88 -0.7489 -0.6178 -0.4867 -0.3556 -0.2245 -0.0934 0.0378 0.168...

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Display time before the prompt arrows
See this utility on the File Exchange: https://www.mathworks.com/matlabcentral/fileexchange/26471-setprompt-set-the-command-win...

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How to do the example below in MatLab? I am dealing with same sort of problem in matlab
Something like this should do what you want (using made up example data): % simulating read of csv file1 (replace by data1 = re...

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Where is the error in my code?
You need to specify an increment size if you expect r to be a vector. Currently it is a scalar equal to zero. Q will not be a ...

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help on graph (w/o common matrix plotting built-in functions)
In that case, maybe something like this will get you close. A = randi(2,10,365)-1; x = 1:size(A,2); y = size(A,1):-1:1; for ...

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help on graph (w/o common matrix plotting built-in functions)
A = randi(2,10,365)-1 str = repmat(' ', size(A)); str(A==1) = '-'; disp(str)

presque 4 ans il y a | 1

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Reveresing the order of columns in an array
% Note: use semicolons instead of commas for row breaks so you get 4 columns q = [1 2 3 4; 5 6 7 8; 9 10 11 12; 13 14 15 16; 17...

presque 4 ans il y a | 0

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Recognise specific pattern in timetable
One approach without requiring the Signal Processing Toolbox: load('answers.mat') % an approximation of your data x = data(:,1...

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Extracting 2 Far right characters
One approach that generates a cell array: tt= {'United Kingdom TR';'United Kingdom SR';'United Kingdom WR';'Worldwide TC'}; c ...

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How to Rescale X Axis in Plot
Since you didn't show the code you used to generate the plot or include the data, I'll have to guess what the problem might be. ...

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'Replace' shortcut in editor for R2022
Ctrl-H

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calculate time from alarm (variabel x) to event (variable y)
Try this t = [0;10;20;30;40;50;60;70;80;90;100]; % in sec; variables are generated every 10 seconds alarm = [0;0;1;0;1;0;0;1;...

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Read txt file with no header
This should work for any number of columns and it automatically detects the number of header rows and the variable names. t = r...

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How do I resolve these two lines separately?
Another approach B=rand(3,5) A=[0 0 0 1 0;1 1 1 0 0;1 0 1 1 0] idx = B > 0.6 A(idx) = ~A(idx)

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Count number of words per row in a string
In 2020b or later you can also use a pattern with a regex pattern to find (and count) words. It took some experimenting to get ...

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Can yous tell me this block in Simulink
That looks like the XY Graph block, perhaps. It normally isn't orange, however.

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Calculating u and v components from wind direction and speed
Actually, it is straightforward. v (North (y) component) and u (East (x) component) can be calculated from S (wind speed) and D...

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How do I calculate the acceleration using only 3D distances?
load acc_dist.mat xyz = cell_of_double_pre_ballsCopy{1}; dxyz = diff(xyz); % difference between adjacent points in xyz coordin...

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Plot is not showing anything.
Replace your loop with h= 0.1; %step size for loop t = 0:h:1; for i = 1:numel(t) xt(i) = X0*exp((-S)*wn*...

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How can I use a variable for formatting?
You can also use %*d, like this for k = 1:5 fprintf('%*d\n', k, 2*k); % the first argument (k) is the field width, 2*k is ...

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Is there a bug in imread() or imfinfo() with multiframe GIFs in R2021a/b?
Output of your test script theonlymap = 1.0000 0.0824 0.9137 0 0 0 0 0 0 0 0 ...

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How to Create/Modify for matrices or matrix
K=5; matA = 1:K matB = repmat(matA, 1, K)

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3D Profile Extrude
x = [82, 80, 65, 38, 82]; y = [82, 54, 36, 94, 82]; x = repmat(x, 10, 1); y = repmat(y, 10, 1); z = (1:10)'; z = repmat(z, ...

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Damping and natural frequency
The damping ratio that you calculated is greater than one, meaning this system is overdamped (non-oscillatory). It has two real...

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Matlab graph is not drawn
You aren't incrementing k or creating t in your loop. There are also other things wrong with your calculation of x. For one th...

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Try and Catch for multiple conditions
Maybe something like this: if isfield(src, 'DeviceName') Name = src.DeviceName; else Name = 'unknown'; % or, just do...

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Matlab is not recognizing the graph(...) function.
The graph function was added in release 2015b. See doc page here (the info on when it was introduced is at the bottom): https:/...

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Filling an array with color points
j = 34; g = 3; A = zeros(j,g); A(:,3) = 1; % put ones in the third column A(:,2) = ([0:j-1]/j).'; % fill in the second colum...

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How to change the type when creating HDF5 attributes.
I don't have any hd5 files to test this with, but I suspect that if you change this h5writeatt('tt.h5','/tide','Transient', "TR...

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Interpolating NaN values within a matrix
I would recommend the fillmissing function.

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