Answered
Error bars and legend order inconsistent?
It is difficult to follow your code. Perhaps something like this — plot(x,Norm_Opt{j},'Color',cmapUS(((US_Factor(nUS)/US_Fa...

3 years ago | 0

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Answered
Finding peaks greater than a set value
‘Any ideas?’ Yes. None of the identified peaks meet the criteria you set. See my latest Comment to your earlier post How ...

3 years ago | 0

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Answered
how to add arrow on phase portrait
Use the quiver function — to = 0; tf = 30; tspan = to:0.1:tf; plotArrows = @(m) quiver(m(:,1), m(:,5), gradient(m(...

3 years ago | 0

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Answered
if statement inside of a Function is working only in certain conditions
I would just set this up as an anonymous function — capacitorVoltage = @(t) 5*(t<0); t=-2:0.2:5; v_c=capacitorVoltage(t)...

3 years ago | 2

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Finding peaks with a set amplitude range?
‘It just returns a bunch of zeros even though I told it not to. Any ideas?’ It may seem that a logical vector is returning ze...

3 years ago | 0

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Superimpose three solutions onto a direction field
Use the hold function to plot m,ore than one set of data on an axes. I do not know what the second one is, however this will ...

3 years ago | 0

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Integral from 0 to inf with imaginary numbers takes too long
First, the Symbolic Math Toolbox is not going to be as efficient as direct numerical calculations. Second, you never told the...

3 years ago | 0

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Find phase plot between input and output experimental data?
I am not certain what function created that plot (it might have been the System Identification Toolbox bode function.) See if...

3 years ago | 0

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Symbols in a transfer function:
The Control System Toolbox functions require numerical values. It is possible to create an anonymous function with your code,...

3 years ago | 1

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Answered
New to filter design: Designing filters at very low frequencies (mHz) on logarithmic frequency scale
It is quite common for a transfer function implementation to be unstable. The solution is to use zero-pole-gain output from the...

3 years ago | 0

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How can I rewrite this to get peak locations?
The locations are the second output from findpeaks, so I doubt that arrayfun will do what you want. I would do something like...

3 years ago | 0

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Problem with Fourier Transform fft
The ‘Time’ vector is not uniformly sampled. Most signal processing techniques require regularly-sampled vecttors, so I used the ...

3 years ago | 0

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Answered
Best fit of 4 points with three coordinates (x, y, z)
One approach — x= [-11.94, -14.8525, -25.0775, -45.3375]; y= [0, -0.47195, -0.52887, -87.44586]; z= [0, -2.86065, -3.04815, ...

3 years ago | 0

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What is the most efficient way to "reverse" interpolate a 3D array?
The loop would likely not be necessary interpolationg with the scatteredInterpolant function. Pass all the ‘_target’ values as ...

3 years ago | 0

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Monod nonlinear regression solved with Ode45
See: Monod kinetics and curve fitting . It could possibly work with your data. Note — As posted, ‘S’ has 21 elements, ho...

3 years ago | 1

Answered
colormap does not work on histogram2
That is not possible with histogram2, however it is with histcounts2 and bar3 — X = randn(1000,1); Y = randn(1000,1); [N,...

3 years ago | 0

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Answered
How to transform the normalized values of a histogram (i.e. the bars heights) in percentages?
Altering the histogram plot is likely not possible because the ‘Values’ vector is read-only. The easiest approach is likely t...

3 years ago | 1

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Answered
Patch function doesnt shade the second plot.
One of those vectors in the second plot likely has at least one NaN value. Try something like this — meanNDtest = fillmissi...

3 years ago | 1

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Answered
I am getting incorrect FFT values
The 1.86 value is correct. Look at the time domain plot — %FFT T=0.01; %cuz the time interval is 0,01. You can see in "t" ...

3 years ago | 0

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Answered
Solve a system of 3 second order equations
This should get you started — syms c_1 c_2 k_1 k_2 k_n k_nl J_1 J_2 J_n theta_1(t) theta_2(t) theta_n(t) theta_out(t) t Y d1...

3 years ago | 0

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mesh or surf from x y z coordinates
I am not certain what you want. One approach — LD = load(websave('swarm','https://www.mathworks.com/matlabcentral/answers/u...

3 years ago | 0

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Answered
Fill light gray color between two horizontal lines in a plot?
To plot a ‘dash-dot¹ line requires a slightly different LineStyle definition — x=[1:10]; y=[1:10]; figure(1) plot(x,y,'b') ...

3 years ago | 0

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Answered
I Want to solve system of three differential equations numerically. How can i solve it with ode45, or are there any other ways?
syms v1(t) y1(t) y2(t) v2(t) a2(t) phi(t) L r A B C D E F G H I J beta Omega(t) Omegaac(t) omega(t) omegaac(t) Y t sympref('...

3 years ago | 0

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Answered
import data from csv and plot it
I opened it in Excel, did a straightforward manual copy-paste to Notebook, and saved it to a text file (that I uploaded here). ...

3 years ago | 1

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x values when taking a numerical derivative
‘I think (correct me if I'm wrong) this can be done by diff(y)./diff(x)’ Not actually wrong, simply mistaken with respect to ...

3 years ago | 0

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Answered
Plotting surface tangent to surface plot
The code defines ‘x’ as a scalar: x=linspace(-9,0.5,1); with one element equal to 0.5. That creates ‘X’ and ‘Y’ as vectors...

3 years ago | 0

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How do I change a date in a cell into three cells in MatLab xlsx file?
After using readtable to import the Excel file, try something like this — T1 = table(datetime('now') + days(0:4).', rand(5,1),...

3 years ago | 1

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Answered
How can i find the co-ordinates of a point where the slop is -1 in below graph ?
Try this — T1 = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1285050/cmos.txt', 'VariableNamingRu...

3 years ago | 2

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Answered
Improve part of code using a loop
One approach — date_time = (datetime('01-Jan-2023') : caldays(1) : datetime('31-Dec-2023')).'; Values = randn(numel(date_time...

3 years ago | 0

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Answered
How to plot 2 columns (one is population the other is years) in a linear graph
This is difficult without the Excel file. Taking a wild guess: plot(Population.years, Population.Population) alternatively...

3 years ago | 0