Star Strider

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Hic sunt dracones! PROFESSIONAL: Physician (M.D.): Diplomate of the American Board of Internal Medicine; M.Sc. Biomedical Engineering: Instrumentation, Signal Processing, Control, System Identification, Parameter Estimation NON-PROFESSIONAL: Amateur Extra Class Amateur Radio Operator; Private Pilot, Airplane Single Engine Land, Instrument Rating Airplane; Gamer NOTE: I do not respond to emails or personal messages, unless they are about my File Exchange contributions. Time Zone: UTC-7 (Standard); UTC-6 (Daylight Savings/Summer)

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Why is the sky blue?
Rayleigh scattering

約1時間前 | 1

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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...

約9時間前 | 1

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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...

約16時間前 | 0

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colorbar label along y-axis instead of x-axis
Use the colorbar Location and Position properties to put it where you want it.

1日前 | 0

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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...

1日前 | 1

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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...

1日前 | 0

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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...

2日前 | 1

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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:...

2日前 | 1

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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...

3日前 | 0

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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]; ...

4日前 | 0

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Why does my plot line appear outside the axes?
You may have inadvertently turned the Clipping property to 'off' (although that doesn’t explain the absence of the extension of ...

4日前 | 0

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How to use integral when limits are anonymous functions
‘How do I overcome this?’ First, use the int function to integrate symbolic functions. It will return a numeric result if i...

5日前 | 0

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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...

6日前 | 1

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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 ...

6日前 | 0

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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...

6日前 | 0

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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'} ...

6日前 | 0

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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...

6日前 | 1

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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 ...

7日前 | 1

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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...

7日前 | 0

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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...

8日前 | 0

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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 ...

9日前 | 0

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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 ...

9日前 | 0

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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...

10日前 | 0

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Plot a vector with a given angle against the y-axis
Another approach — thetad = 280; % Desired Angle (Guessing Value) x...

10日前 | 0

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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...

11日前 | 0

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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)...

12日前 | 0

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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...

12日前 | 0

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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...

13日前 | 0

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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...

13日前 | 0

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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 ...

13日前 | 0

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