Answered

Unable to fully filter out a tone with a notch filter.

It is not possible to run your code. The filter may be working, however note that it is only order 2. That may be appropria...

Unable to fully filter out a tone with a notch filter.

It is not possible to run your code. The filter may be working, however note that it is only order 2. That may be appropria...

18 days ago | 0

Answered

Choosing a suitable fit for the graph

I would choose a different function, perhaps something similar to with appropriate additional parameters. Then use findpeaks t...

Choosing a suitable fit for the graph

I would choose a different function, perhaps something similar to with appropriate additional parameters. Then use findpeaks t...

19 days ago | 1

Answered

Make Parametric Curves Plot Smoother

I do not see any problems. The issue you are probably dealing with has to do with the finite resolution of your monitor, and the...

Make Parametric Curves Plot Smoother

I do not see any problems. The issue you are probably dealing with has to do with the finite resolution of your monitor, and the...

19 days ago | 0

| accepted

Answered

The results of the plots does not match the actual ones

There may have been a problem converting degrees to radian measure, however that is not required in MATLAB. Use trigonometric f...

The results of the plots does not match the actual ones

There may have been a problem converting degrees to radian measure, however that is not required in MATLAB. Use trigonometric f...

20 days ago | 1

| accepted

Answered

Scatter plot and linear regression

It would help to have your data and a description of what you want to plot and regress against what else. Then, use the lslin...

Scatter plot and linear regression

It would help to have your data and a description of what you want to plot and regress against what else. Then, use the lslin...

20 days ago | 0

Answered

I am new to matlab and I'm trying to filter the noise out of the audio. I tried some filters but can't event get close to lessening the noise.

If it contains broadband noise, a frequency-selective filter will not be able to eliminate the noise. In that event, experiment...

I am new to matlab and I'm trying to filter the noise out of the audio. I tried some filters but can't event get close to lessening the noise.

If it contains broadband noise, a frequency-selective filter will not be able to eliminate the noise. In that event, experiment...

21 days ago | 1

| accepted

Answered

remove inf in quiver

Without having ‘u’ and ‘v’ to work with, perhaps something like this using fillmissing (or fillmissing2) — x=-5:0.1:5; y=-5:...

remove inf in quiver

Without having ‘u’ and ‘v’ to work with, perhaps something like this using fillmissing (or fillmissing2) — x=-5:0.1:5; y=-5:...

21 days ago | 1

| accepted

Answered

How can I calculate the gradient of a vector in MATLAB?

That depends on how you want to do it. The Symbolic Math Toolbox has the gradient and jacobian functions. To do it numeri...

How can I calculate the gradient of a vector in MATLAB?

That depends on how you want to do it. The Symbolic Math Toolbox has the gradient and jacobian functions. To do it numeri...

22 days ago | 0

| accepted

Answered

How to draw an inclined cone with an ellipse base in the three-dimensional XYZ coordinate system?

Start with the cylinder function, then modify it to create the sort of tilted cone you want. Example — r = [1 0]; ...

How to draw an inclined cone with an ellipse base in the three-dimensional XYZ coordinate system?

Start with the cylinder function, then modify it to create the sort of tilted cone you want. Example — r = [1 0]; ...

23 days ago | 1

Answered

Swapping X and Y Axis of a Figure for a One-layer Matrix

I can’t run your code. Try this — contourf(E.') instead. That will transpose the matrix. so it should display the way y...

Swapping X and Y Axis of a Figure for a One-layer Matrix

I can’t run your code. Try this — contourf(E.') instead. That will transpose the matrix. so it should display the way y...

24 days ago | 2

| accepted

Answered

Generate a time series from power spectral density

In that event, just create a sine curve of the appropriate frequency or frequencies as determined by the PSD result. This will ...

Generate a time series from power spectral density

In that event, just create a sine curve of the appropriate frequency or frequencies as determined by the PSD result. This will ...

24 days ago | 0

| accepted

Answered

Trying to find the integral under the curve at a certain bandwidth

Try this — clear all close all clc L=10; n=1.45; c=2.9979e8; dt = 6e-12; T=10*2*L*n/c; t = (-T/2/dt:1:T/2/dt)*dt; N...

Trying to find the integral under the curve at a certain bandwidth

Try this — clear all close all clc L=10; n=1.45; c=2.9979e8; dt = 6e-12; T=10*2*L*n/c; t = (-T/2/dt:1:T/2/dt)*dt; N...

25 days ago | 0

| accepted

Answered

Prepare Fourier Amplitude Spectrum from ground motion record (Peak-Acceleration vs time-period)

Perhaps this — T1 = readtable('india.19911019...at_output.txt'); T1.Properties.VariableNames = {'Peak Acceleration','Time'} ...

Prepare Fourier Amplitude Spectrum from ground motion record (Peak-Acceleration vs time-period)

Perhaps this — T1 = readtable('india.19911019...at_output.txt'); T1.Properties.VariableNames = {'Peak Acceleration','Time'} ...

25 days ago | 0

Answered

Other ways to improve fft amplitude

Another option may be to zero-pad the fft using: Fs = signal_sampling_frequency L = signal_length; NFFT = 2^nextpow2(L) FTs...

Other ways to improve fft amplitude

Another option may be to zero-pad the fft using: Fs = signal_sampling_frequency L = signal_length; NFFT = 2^nextpow2(L) FTs...

25 days ago | 1

| accepted

Answered

How can I write a set of first order ODEs with two variables?

Try something like this — syms D g m t x(t) y(t) Y dx = diff(x); d2x = diff(dx); dy = diff(y); d2y = diff(dy); DEqn1 ...

How can I write a set of first order ODEs with two variables?

Try something like this — syms D g m t x(t) y(t) Y dx = diff(x); d2x = diff(dx); dy = diff(y); d2y = diff(dy); DEqn1 ...

26 days ago | 1

Answered

Recover signal from single-sided spectrum using ifft

The problem appears (to me) that you are using the absolute value (‘P2’) of the fft result. This essentially discards the phase...

Recover signal from single-sided spectrum using ifft

The problem appears (to me) that you are using the absolute value (‘P2’) of the fft result. This essentially discards the phase...

26 days ago | 0

Answered

FFT to a simple sine wave

I am not certain what the independent variable axis is (the label is cut off), however if you want a power spectral density plot...

FFT to a simple sine wave

I am not certain what the independent variable axis is (the label is cut off), however if you want a power spectral density plot...

27 days ago | 0

Answered

I am recieving an error in creating the solution however it still prints a result.

In the last iteration of the loop, the results are all empty. One way to avoid the error is to test for at least one field to ...

I am recieving an error in creating the solution however it still prints a result.

In the last iteration of the loop, the results are all empty. One way to avoid the error is to test for at least one field to ...

28 days ago | 0

| accepted

Answered

Solving ODE using laplace

Your code looks correct to me, and when I checked the result with dsolve, its solution agreees with yours — syms t s y(t) Y X ...

Solving ODE using laplace

Your code looks correct to me, and when I checked the result with dsolve, its solution agreees with yours — syms t s y(t) Y X ...

28 days ago | 0

Answered

Old Matlab example of 1D FFT filter

The only function that I am aware of that might do what you want is the fftfilt function (introduced before R2006a). It require...

Old Matlab example of 1D FFT filter

The only function that I am aware of that might do what you want is the fftfilt function (introduced before R2006a). It require...

29 days ago | 0

| accepted

Answered

Plot a vector with a given angle against the y-axis

Another approach — thetad = 280; % Desired Angle (Guessing Value) x...

Plot a vector with a given angle against the y-axis

Another approach — thetad = 280; % Desired Angle (Guessing Value) x...

29 days ago | 0

Answered

Decreasing bin size FFT options for increased resolution

You can minimise the spectral leakage by windowing the fft (except for a rectangular window, which is the default if no others a...

Decreasing bin size FFT options for increased resolution

You can minimise the spectral leakage by windowing the fft (except for a rectangular window, which is the default if no others a...

30 days ago | 0

| accepted

Answered

Could anyone explain the example provided in thr help for understanding the use of fft?

This calculation of the frequency vector for the displayed Fourier transform is not the easiest to understand: f = Fs*(0:(L/2)...

Could anyone explain the example provided in thr help for understanding the use of fft?

This calculation of the frequency vector for the displayed Fourier transform is not the easiest to understand: f = Fs*(0:(L/2)...

1 month ago | 0

| accepted

Answered

Need help in assigning frequency and normalising amplitude to the fft plot

There may be several approaches to your problem. One of them is this — clear all close all clc L=10; n=1.45; c=2.9979e...

Need help in assigning frequency and normalising amplitude to the fft plot

There may be several approaches to your problem. One of them is this — clear all close all clc L=10; n=1.45; c=2.9979e...

1 month ago | 0

| accepted

Answered

Left and Right side have different elements

You need to subscript ‘t’. Then, it works — t = 0:0.01:4; % Timesteps for robotic arm motion for i = 1:length(t...

Left and Right side have different elements

You need to subscript ‘t’. Then, it works — t = 0:0.01:4; % Timesteps for robotic arm motion for i = 1:length(t...

1 month ago | 0

Answered

Error using Odearguments - vector must return a column

You only have one differential equation, so only one initial condition is necessary. %r_H2= -(-Rds - Rwf - Rh); %Rd = kds*(C...

Error using Odearguments - vector must return a column

You only have one differential equation, so only one initial condition is necessary. %r_H2= -(-Rds - Rwf - Rh); %Rd = kds*(C...

1 month ago | 0

| accepted

Answered

I want to change the symbolic variables in my matrix to numbers

Use the fplot function — clear all ; close all; close ; clear syms s Expr = (sin(s)); F1 = int(Expr) syms n expr2 = 1/n ...

I want to change the symbolic variables in my matrix to numbers

Use the fplot function — clear all ; close all; close ; clear syms s Expr = (sin(s)); F1 = int(Expr) syms n expr2 = 1/n ...

1 month ago | 0

| accepted

Answered

How to remove (or isolate) side peaks except main peak after FFT

Using: NFFT = 2^nextpow2(numel(signal)) and a window function (for example hann) in the fft call could improve the fft result...

How to remove (or isolate) side peaks except main peak after FFT

Using: NFFT = 2^nextpow2(numel(signal)) and a window function (for example hann) in the fft call could improve the fft result...

1 month ago | 0

Answered

Trying to combine two IR spectra where x is wavenumber (cm-1) and y is transmittance (0 to 1), having trouble.

It would help to have the data. The best way is probably to interpolate the longer series to the length of the shorter series...

Trying to combine two IR spectra where x is wavenumber (cm-1) and y is transmittance (0 to 1), having trouble.

It would help to have the data. The best way is probably to interpolate the longer series to the length of the shorter series...

1 month ago | 0

Answered

Tornado chart with colormap gradient

Perhaps something like this — % Data data = [0.496; % Electrical conversion efficiency 0.426; % Biogas efficiency val...

Tornado chart with colormap gradient

Perhaps something like this — % Data data = [0.496; % Electrical conversion efficiency 0.426; % Biogas efficiency val...

1 month ago | 0