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Star Strider


Last seen: Today
14,008 total contributions since 2012

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

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Answered
Shade standard deviation for time series
I cannot run your code, so I cannot test this. However, fill may not be appropriate here. See if using patch instead does sh...

5 hours ago | 0

Answered
FFT - Single sided phase?
It is not necessary (or advisable) to multiply the phase values by 2, particularly because it doesn’t matter. The phase values ...

13 hours ago | 0

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Answered
FFT with hanning window
I have no idea what ‘pop_loadset’ does, however it apparently returns ‘x’ as a structure. You will need to extract the informat...

16 hours ago | 0

Answered
How can I change sampling frequency when I use audiowrite function?
From the audowrite documentation for Fs: ‘When writing to .m4a or .mp4 files on Windows platforms, audiowrite supports only sa...

23 hours ago | 0

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Answered
No file found, when the folder has been found and the file is listed in it
We cannot see the rest of the function that you are using to read the files (that you apparently wrote, and does not produce any...

1 day ago | 0

Answered
How to read some data from a text file
Use the textscan function: fidi = fopen('TestFile20200709.txt','rt') Datac = textscan(fidi, '%f%f%f%f%f', 'CommentStyle','#',...

1 day ago | 0

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Answered
Indexing Issue (with both ismember() and find())
You have encountered floating-point approximation error, and the way the colon operator works. Try this: array1 = [.1,.2,.3...

1 day ago | 0

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Answered
How can one display fitting equations (with t stat and R^2) on a scatter plot
Try this example: load carsmall X = [Weight,Horsepower,Acceleration]; mdl = fitlm(X,MPG) Tst = mdl.Coefficients.tStat; Rsq...

2 days ago | 0

Answered
Plotting response of multiple filters in single figure of freqz/freqs and fvtool ?
This is likely the only option: [h{1},w{1}] = freqz(rand(5,1),1, 2^16, 1000); [h{2},w{2}] = freqz(rand(5,1),1, 2^16, 1000); ...

2 days ago | 1

Answered
Calculate the area under a section of the curve?
I am not certain what you want. Try this: D1 = load('EDA_pxx.mat'); EDA_pxx = D1.EDA_pxx; D2 = load('w.mat'); w = D2.w; ...

2 days ago | 0

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Answered
lsline error message and how to deal with it
With only the error message, it is not possible to determine exactly what the problem is. From the lsline documentation: ...

2 days ago | 0

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Answered
How can I solve this?
See the documentation for lt and its friends.

2 days ago | 0

Answered
To find the first 3 local maximas of a plot/ dataset without the islocalmax and findpeaks
Yes. Is this for homework or an exam?

2 days ago | 0

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Answered
Conversion to cell from ClassificationSVM is not possible
I cannot fun your code, however running something similar suggests to me that using curly braces {} to subscript ‘SVMModels’ cou...

3 days ago | 0

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Answered
fmincon error in intial value
The ‘fun6’ function produces a purely imaginary result at the initial point. That is throwing the error. One option is to sp...

3 days ago | 0

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Answered
Error with load function
I am surprised the save call worked at all! Note that: savepath='filepath'; savefile='Tumble Data User Applicable.mat'; A...

3 days ago | 0

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Answered
using Matlabfunction for determinant, not enough input arguments
I am not certain with the problem is with the ‘J_fcn’ produced by matlabFunction. (The error may refer to the reshape call with...

3 days ago | 0

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Answered
how to center axis label?
Try this: ylabel({'Trajectory angle';'with respect to vortex axis (°)'}) That worked when I tested it. See the documentati...

4 days ago | 1

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Answered
Who could use short code to represent the following code:
Try this: data(:,12) = mean(data(:,2:11), 2); If I understand correctly what you want to do, that should work.

4 days ago | 0

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Answered
In an assignment A(I) = B, the number of elements in B and I must be the same.
By defining ‘y’ in ‘ObjectiveFunction’, you are overwriting whatever you pass to it as ‘y’ as an argument. Also: x<=0.1; m...

4 days ago | 0

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Answered
Table Variable Name "X_|P|" works on my computer.....does not work on anyone elses
The extended variable names began in R2019b. From the Release Notes for R2019b with respect to table variable names: ‘Start...

4 days ago | 0

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Answered
How to find radius of curvature?
One option is the code in fitting a circle with fitnlm. (I added plotting code and a plot of the data and the fitted circle.)

4 days ago | 0

Answered
Scatter3 not plotting after providing condition.
Use the hold function. figure scatter3(x(w1), y(w1), z(w1), 'y', 'filled') hold on scatter3( ...) scatter3( ...) scatter...

4 days ago | 0

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Answered
Notch filtering from coefficients
The function gives you the ‘b’ vector for the filter. The ‘a’ vector is 1, since this appears to be a FIR filter design. To ...

5 days ago | 0

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Answered
Accessing a value in a vector from a conditional statement
There are several ways to do this. My approach: v=[6 10 25 35 50 65 80]; x=10.02; y=10.47; mv=max(x*.125,y*1.25); ind =...

5 days ago | 0

Answered
How can I do implicit differentiation
I can find no documentation that it is possible in MATLAB (as much as I like it). See this Wolfram Alpha page for the correct...

6 days ago | 0

Answered
run command 100 times and put the answers in one vector
Use a for loop. Assign the appropriate ‘results’ to a cell array (if they are different sizes in each iteration), or vector (if...

6 days ago | 0

Answered
How do I plot different array smoothly which contain NaN in same figure
One option is to use the fillmissing function. Example — sig1 = [rand(1,10) NaN]; sig2 = [rand(1,10) NaN]; sig3 = [rand(1...

6 days ago | 0

Answered
numerical solution of a system of ODE which is not in standard form
It would likely help to have your code. If you want more tractable numerical results, use the vpa function. The double funct...

6 days ago | 1

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Answered
Play an audio files with different volumes
See my Answer to your duplicate Question.

6 days ago | 0

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