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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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Answered
isolate function is not providing multiple solutions to a polynomial problem?
Apparently isolate does not, however solve does — syms x a b c eqn = a*x^2 + b*x + c == 0; xSol = solve(eqn, x) pretty(xS...

1 day ago | 0

Answered
Spectrometer signal processing.
One approach — Data = {1729167932375 '13:25:32.375' 405650.13 1729167932475 '13:25:32.475' 400621.04 17291...

1 day ago | 1

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Answered
Why do each curve appears to be two when I zoom in on them?
Your code must be plotting them that way (original and one with a slight offset). We cannot determine what you are plotting wit...

4 days ago | 0

Answered
How to extract the term associated with a symbolic variable and assign to another symbolic variable?
Useee theee function to find an expreessiion for — syms R_v L_v L_ph U_s U_i w s U_sr U_si real syms Z_v Z Y S sympref('Ab...

4 days ago | 0

Answered
How to express rest of expression in terms of other variables
Try this — syms p K_B Phi_V Phi_G s K_i K_p real; Phi_G = p/s*(K_p + K_i/s) Eqn1 = p == K_B*(Phi_V - Phi_G) Eqn2 = isol...

4 days ago | 0

Answered
How to calculate the average of each column without taking zeros values
Try thiis — matrix = [1,3,5,0,0,0; 2,0,3,4,0,0; 3,0,0,3,0,1;4,2,2,1,8,2; 5,3,3,0,5,0; 6,7,0,0,2,0] matrix(matrix == 0) = Na...

4 days ago | 0

Answered
Fitting and predicting from 3D data
I do not know what your data matrices are, however the scatteredInterpolant function could work.

5 days ago | 0

Answered
How to change the color of the line in the legend of the figure?
It would help to have your code and data. The legend entries correspond to the lines being plotted, and if there are more tha...

5 days ago | 0

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Answered
Trying to make the plot of potency along Z that is a decaying exponential but it goes straight to zero
I am not certain what you are calculating. The ‘integral_value’ value gets very large very quickly, so ‘Pas’ decays quickly ...

5 days ago | 0

Answered
Ways to Apply filter for Signal
A loop may be appropriiate. Put the fiilters in a cell array, and then call each filter with its appropriate signal. Example...

6 days ago | 0

Answered
how can one assign specific colors to bars in scatterbar3?
Edit the function to return the ‘h’ vector (of patch handles) and then experiment with setting the 'FaceColor' (and perhaps 'Edg...

6 days ago | 0

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Answered
plotting a line from a parameter form
In your isolate call, no longer exists as a variable. You can create ‘g3’ eartlier in the code (when it does exist), and then ...

6 days ago | 0

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Answered
How to get a scalar from MATLAB
Probably the easiest way to do what you want is to use the dot function — A=[1:50]; B=[1:50]; rp = dot(A,B) It doesn’t car...

6 days ago | 0

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Answered
How to make a signal spectrum expressed in dBm look pretty?
Since there are several signals in the matrix being plotted, one option would be to plot them in 3D instead. Those optioons cou...

8 days ago | 1

Answered
Why does a marketing web page open every time I use documentation?
I am not certain that I can reproduce the behaviour that you report (although I am not certain that I understand what it is). W...

8 days ago | 0

Answered
butterworth 필터 적용시 신호 발산
I am not certain what you are asking. Fs = 32768; %data_signal의 sampling 주파수 n = 6; %butterworth 필터 차수 wn = 5; %cut off fr...

8 days ago | 1

Answered
why am I Unable to overplot a line on a surface plot?
Plotting on the surface itself is straightforward. It simply requires using the scatteredInterpolant function to create and plo...

9 days ago | 0

Answered
Put arrow and its value in a plot
The 'textarrow' coordinates have to adapt to the data and then correct for the reversed y-axis direction. Try this — load(...

10 days ago | 0

Answered
Hi, How can I create an FIR from difference of two impulse responses?
I slightly changed your original code here, in order to define my questions about it. It is possible to use the firls functio...

11 days ago | 0

Answered
[ideas wanted]: How to find "peaks" of sloping signal?
The online ability to run scripts seems to be broken. I used MATLAB Online to devise this — % LD = load('data.mat') file = ...

14 days ago | 1

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Answered
Computing error and plotting its graph
The reason the code fails is that: abs(x1-xx) is a (1 x 51) vector (because ‘x1’ is also a (1 x 51) vector), and it’s not pos...

16 days ago | 1

Answered
Calculating the aortic flow downstream valve using Womersley and 3-element Windkessel model calculations from my FSI results - Why unusual sine waves at the end of flow curve?
I’m not familiar with your abbreviations. FSI = ? STJ = ? Beyond that, your code runs without error. Please explain what...

16 days ago | 0

Answered
generate white noise signal with certain bandwidth?
The filtered signal iis no longer a white-noise signal, although the original signal is. Try this — Fs = 1000; ...

16 days ago | 0

Answered
Powerline interference in ECG
Try this — Fs = 256; % Signal Sampling Frequency Fn = Fs/2; ...

17 days ago | 0

Answered
How can I solve this confidence level error?
You are plotting it incorrectly. Use this: loglog(f_pressure, Pxxc_pressure, 'r', 'LineWidth', 1.5); instead of: loglog(...

18 days ago | 0

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Answered
Detecting storms from wave height data
I am not certain what you want. Try this — load ('H.mat'); %3 hour data whos('-file','H.mat') threshold=1 % t = linspace...

19 days ago | 0

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Answered
Płot sample of signal
The number of samples you need to plot is equal to the sampling frequeency multiplied by the number of seconds. Fs = 1000; t...

20 days ago | 0

Answered
How to solve this equations using matlab code,I use solve but I have obtained a wrong and strange solution, and I don't know why.
It would help to have your code. See if using the vpa function will produce a moree understandable reesult, specifically: ...

21 days ago | 0

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Answered
Process Reaction Curve: Ziegler-Nichols rules
I’m not certain that I understand what you’re asking. See if the System Identification Toolbox procest function will do what ...

21 days ago | 0

Answered
Would you please help me to install and use FFmpeg?
Use your favourite search engine and the search string: ffmpeg windows I found several sites that apparently show how to do tha...

21 days ago | 1

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