Answered
Designing Yulewalk Filter for a Bandpass Type
The yulewalk filter will be a FIR filter, whiel the original filter is an IIR filter. A FIR filter generally requires a much hi...

2 years ago | 0

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Confidence interval calculation. Cannot compute confidence interval for imaginary values.
The parameters aren’t complex. All the results are real. The problem with your code is that in MATLAB, function arguments an...

2 years ago | 0

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Answered
How to correct the recording of a daamaged accelerometer in earthquake analysis
If you have the Signal Ptocessing Toolbox, an alternative approach would be to use the highpass (or bandpass to also eliminiate...

2 years ago | 0

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Answered
How to use previous answer in new calculation n times
Perhaps something like this — A=[0.3 -0.2; -0.6 0.8]; B=[-14;2]; x=[1;2]; y = x; for k = 1:10 y = A*y+B; ym(:,k)...

2 years ago | 0

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Answered
I have purchased the Signal Processing Toolbox but still get an error when trying to use a function
I am not certain what the problem is. imshow(imread('Screenshot 202....49.59 AM.png')) First, run these from a script or you...

2 years ago | 0

Answered
difference between 2 values in a vector
Try this — x = [0.2 0.0 0.0 0.0 0.25 0.0 0.0 0.0 0.3 0.0 0.0 0.4 0.0 0.0 0.0 ...

2 years ago | 0

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Answered
result spectrogram from lowpass filter still pass frequency above the treshold
See if: y=lowpass(yori,10,100, 'ImpulseResponse','iir'); improves the result. .

2 years ago | 0

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Answered
F1(u,v)=0,F2(u,v)=0 with 4 parameters a,b,c,d, 3 of which (a,c,d) are given
a = 1.5; c = 0.4; d = 0.9; b=0.1:0.1:9; syms u v F1 = @(u,v,b) u*(1 - u) - b*u*v/(c*u + 1); F2 = @(u,v,b) 0.5*b*u*v/(c*u +...

2 years ago | 0

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Answered
Unrecognized function or variable 'del'.
That should actually work — tic n = 0; for del=0.0:0.4:pi n=n+1; pe(n)=1.2*sin(del); end toc pe A mnore effi...

2 years ago | 0

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How to make sure that the horizontal axes of two figures align?
If the figures are open at the same time, you can use the linkaxes function. If they are not, you can use xlim one one figure a...

2 years ago | 0

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csv to fft matlab
You cannot calculate the Fourier transfomors without a corresponding sampling frequency or time vector. Assuming the sampling...

2 years ago | 0

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SENSITIVITY ANALYSIS OF A SYSTEM OF AN ODE USING NORMALIZED SENSITIVITY FUNCTION
I am not certain that this does everything you want, however it now has the virtue of running without error — epidemic1 fu...

2 years ago | 0

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what kind of plot is useful for comparing two matrices?
I am not certain that there is any built-in functtion for this sort of problem. One approach — M1 = randn(5) M2 = M1 + ran...

2 years ago | 1

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Answered
How can I connect the upper endpoint of the red curve to the red dot while keeping the curvature nearly the same?
Here are options using pchip, makima and spline — clear all format long warning off figure set(0,'DefaultAxesFontSize',20...

2 years ago | 0

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Answered
error in ode45 - function must return a column vector
It would help to have ‘dirfield’ (whatever it is). The other problem is that with one differential equation, ‘y0’ has to have o...

2 years ago | 0

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How to convert displacment data in time series to frequency domain ie (from Amplitude (m) v/s time (s) to Amplitude (m) v/s Frequency (Hz)) using fourier transform
I wrote a utility function to do Fourier transforms. Try this — A1 = readmatrix('ellipse_r3.xlsx') figure plot(A1(:,1),...

2 years ago | 0

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How to interpolate data as stairs
You answered your own question — stairs. Note that you can get the (x,y) coordinates as outputs from the stairs function if you...

2 years ago | 0

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How to remove noise of low frequency signals
Calculate the fft of the green signal (if you do not already know its spectral qualities), then use it to define the cutoff freq...

2 years ago | 0

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Answered
How to detect the specific area from an oscilloscope signal
Perhaps something like this — jpgs = dir('*.jpg'); csvs = dir('*.csv'); for k = 1:numel(jpgs) figure imshow(imre...

2 years ago | 1

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Answered
Symbolic expression simplification and shortening
The expression is apparently incomplete. Working with what is provided — syms e e1 e2 h1 h2 h3 A B U = 108*A^2*e^7*e1^3*...

2 years ago | 0

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Answered
How do I check if there is a function with the same name
The which function can be helpful. which which -all If there are any others in your MATLAB search path, it should display th...

2 years ago | 2

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How to italicize a portion of a plot label while keeping the sans-serif font?
A lot of the LaTeX options do not work in MATLAB because many of the font options are not supported. That aside, use \it to b...

2 years ago | 0

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Peak coming at 50Hz in every data file. How to get rid of that
If you have the Signal Processing Toolbox, use the bandstop function: Fs = ...; ...

2 years ago | 0

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how can I find the intersect point of 1 plot and a yline ?
Use interp1 for this — x = [0 10 20 30 40 50 60 70 80 90]; y = [0 0.0328 0.2521 0.7975 1.7295 3.0213 4.5714 6.2283 7.819...

2 years ago | 1

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Answered
OBTENTION OF AN ABSORBANCE SPECTRA FROM AN IMAGE
Without some sort of calibration, what you want to do might not be possible, especially if the resolution is only integers on th...

2 years ago | 0

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Indexing of cell array and a vector
One approach — index = {[0], [0], [5], [0], [6, 7], [0], [0], [1], [0], [0], [0], [ 3]} ; data = [100, 10, 20, 15, 11, 25, 2...

2 years ago | 0

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Answered
how to choose windwo size in the EMG signal ?
I am not certain where you read it either, or the rationale for that particular window length calculation. I am not aware of ...

2 years ago | 0

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How can I read CDF file?
Without having the file to work with, writing specific code to work with it is not possible. Start with the cdfread function...

2 years ago | 0

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Answered
How to store users input in a file?
If you want to read the file, try something like this — % name = input('What is your name? ','s'); % age = input('How old are...

2 years ago | 0

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How do I fit a 3rd order polynomial Basis using fitrgp?
From the documentation, using a table as input: Each row of Tbl corresponds to one observation, and each column corresponds to...

2 years ago | 0

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