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How do I perform several iterations in MATLAB?
Since ‘y’ appears to be a column vector, the loop is not necessary. Just use: L = 1.56*(y.^2)*tanh(61.58/L); If you are loo...

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How do i find x from given y that is closest to my peak or at x=0?
One approach — x = linspace(-10,10,500); y = 1 - x.^2; L = numel(x); yval = -6; zxi = find(diff(sign(y -yval))); for ...

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Symbolic function Gaussian Beam
You need to use element-wise operations. See the documentation on Array vs. Matrix Operations for details. Also, you can use...

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Using repelem to vertially concatonate non-numeric variable
I am not certain what you want to do, however the repmat function might be a better choice, since it allows the dimensions to be...

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Is using alphabetical characters in the area (x,y) syntax possible?
‘Is using alphabetical characters instead of numeric arguments as x-variables in the area (x,y) syntax possible?’ Yes, in the...

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How to plot Rankine Half Body Streamlines
I can’t run that because the relevant data aren’t provided. Tha atan calls could be the problem. Substituting‘atan(y/x)’ with ...

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Matlab - inputs must be scalar when using linspace
The problem is that the original ‘i’ value in each loop returned a vector, and that vector became the subscript for the ‘velocit...

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solve not working for symbolic equation
When in doubt, plot the function. The ‘ib’ function has a minimum value of -146.3 and a maximum of -28.2. It never crosses...

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How to know exactly what row (or index number?) in a table based on user input?
The file posted in your previous Question had only time values. Assuming the data you refer to here is different, the matchin...

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Voltage find equation diagramm
Perhaps this — imshow(imread('LI.jpg')) T1 = readtable('Versuch.txt'); T1.Properties.VariableNames = {'Time','Voltage'} ...

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My calculation for respiratory rate shows the same bpm for my 3 waveforms.
Perhap;s this — LD1 = load('USaverageImageIntensity_R1.mat'); Corr(:,1) = LD1.Corr; LD2 = load('USaverageImageIntensity_R2.m...

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Add initial conditions when using laplace function
That requires a subs call for each equation. (The sympref call here makes this easier. You can remove it later if desired.) ...

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3D plot two curves
Perhaps something like this — p = linspace(-pi/2, pi/2, 50)+pi/2; x1 = cos(p); y1 = 1.01*sin(p); x2 = cos(p); y2 = 0.99*...

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Create a fit for data with a polynom first degree
I would expect R² to be 1 (or close to it) if a lilnear model is a perfect firt to the data. Using fitlm — x = [0.1201 0.13...

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unable to plot columns of multiple cells
Logarithms of time variables do not actually exist (probably anywhere), however there are ways to get round that problem. Thi...

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how to fit the coupled differential equations and get the coefficients?
See: Parameter Estimation for a System of Differential Equations (and similar posts) for an easy way to estimate the parameters....

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Trouble using the ode45 input
The call to ‘f’ in the ode45 call (and the correct ode45 call) should be: [t,Y] = ode45(@(t,y)f(t,y,omega0), [0, 15], [y0,v0])...

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Entry and exit points / trajectories through a rectangle (orbits)
This should be a relatively straightforward interpolation problem in that the only calculations necessary should be to first fin...

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calculate boolinger bandwidth using matlab function
The std2 function takes the standard deviation of all the elements in an array (it only has one argument, that being the entire ...

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strange behavior of plot and freqz
Thje angle functon returns angles in radians. If you add a call to the rad2deg function, the results will be in degrees, and t...

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System Identification - Matlab 2023a not launching
Try running these from a script or your command window — restoredefaultpath rehash toolboxcache It might also be necessary...

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Root Locus from equation?
It might if you aske it to and give it a causal system it can work with — s = tf('s'); eqn = @(u) 1 / (1472*s^4 - 99.2*s^3 -2...

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How to implement Complex Exponential Function Using Matlab ?
I am not certain what you are doing or what ‘w1’ and ‘w2’ are, so using my best guess — format longE F = 40E+3; N = (0:20).'...

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Parse through .txt file to create vector
Use the fixedWidthImportOptions function and readmatrix (since there are apparently no header lines or variable names) — opts...

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Change intensity of zplane figure
Changing the properties requirees a bit of handle-spelunking, however it is possible. Try this — [z,p,k] = ellip(4,3,30,20...

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color region in the plot based on the values
Try this — LD = load('matlab.mat'); A = LD.A thrshld = 5; Lv = A(:,2) > thrshld; idx1 = find(Lv); idx2 = idx1(diff([0; ...

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Problem with fill()/patch() between two lines in R2023a
I am not certain what result you want. For column vectors, use flip (or flipud) and concatenate the vector arguments vertica...

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xlim in boxchart not working
It would help to have the data and code to test, since I cannot find any examples in the boxchart documentation that could prov...

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Is it possible to implement an array as a variable inside a state space matrix?
You would have to integrate your model using one of the numerical integrators such as ode45. It is definitely possible to use ...

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Fitting an exponential equation to this data with CFtool
I get this result with fitnlm — y=[10 80 120 180 280 415 680 972 1178 1322 1445]; t=[50 300 410 600 900 1190 1797 2400 3000 3...

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