Star Strider

Last seen: Today | Active 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 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
Solve the system of three equations and three unknowns
Solve the system symbolically, then plug in the various values for , , and to get values for , , and — syms A B C D E x y z ...

environ 9 heures ago | 0

Answered
Wrong Legend Sign Marker
I am not able to run the code so I cannot test this, however one approach could be: legend([a1(1), a3(1) a4(1)], 'Fiducial Mar...

environ 12 heures ago | 1

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Answered
Readtable() Skipps last rows of csv
If you are using the unique function before writing the output file, it could be deleting several entries. Also, the correct ap...

environ 12 heures ago | 0

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Why 'NaT' (class: datetime) does not work with find function?
Use the isnat function to test for it. .

environ 22 heures ago | 0

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My code won't run, error message :Unrecognized function or variable 'ss'. Error in Q4_109 (line 19) Sys=ss(A,B,C,D);
If you are getting an error that MATLAB cannot find the ss function, then you need to license and install the Control System Too...

1 jour ago | 1

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Very basic question about fir1 command
Probably something like this — t=0:1/500:0.3; n=cos(2*pi*10*t) + sin(2*pi*50*t); Fs = 500; Fn = Fs/2; b = fir1(32, 25/Fn);...

1 jour ago | 0

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Answered
Can someone please help me plot a Voigt function?
The Voigt profile appears to be slightly challenging to code. The File Exchange has a number of entries for Voigt.

1 jour ago | 0

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Plot legend in a bar graph
hFig = figure(1); Month = {'April'; 'May'; 'June'; 'July'; 'August'; 'September'; 'October'; 'November'; 'December';'January'...

1 jour ago | 1

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Answered
How can I get the mean data from under the graphs?
To isolate the regions around the peaks, do something like this — x = linspace(0, 150, 500); ...

1 jour ago | 0

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Answered
Recover the best individual of each population in GA
Another approach that saves the best in each generation: How to save data from Genetic Algorithm in case MATLAB crashes? - MATLA...

2 jours ago | 0

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How to save data in csv format as output data?
That is not the appropriate way to do the conversion. See my Answer to your previous post.

2 jours ago | 0

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How to splits the number into day, hour, minute and second format?
Maybe I’m mising something, however when I last checked, there are not 37 hours in a day or 61 minutes in an hour! Try someth...

2 jours ago | 1

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Error in function interp1: Sample points must be unique.
I looked through the code, however I do not see that you ever actually created a timetable object (introduced in R2016b). The b...

3 jours ago | 0

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Error using / Matrix dimensions must agree
All the operations in ‘phi’ need to be vectorised — r=linspace(-180,180,360); t=linspace(-180,180,360); [R,T]=meshgrid(r,t);...

3 jours ago | 0

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Extract sensorvalues from string with units
See the documentation section on Remove Prefix or Suffix Characters From Variables — type('Test 2020 06 28.csv') ...

3 jours ago | 0

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Answered
Detect increasing or decreasing depth
Assuming the data are contaminated with broadband (rather than band-limited) noise, the different columns are observations and e...

3 jours ago | 1

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Answered
how to put range for findpeaks function
One approach f = linspace(0, 25, 250).'; % Frequency Vector data = exp(-0.1*f) .* sin(2*pi*f*...

3 jours ago | 1

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Answered
Extracting data from timetable
I am not certain what you want. This should get you started — tv = minutes(0:15).'; ...

3 jours ago | 0

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Is it possible to obtain both line and bars on the same graph?
Use the hold function Years=[0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20]; A=[-8.8000 -8.5211 -8.2421 -7.963...

4 jours ago | 1

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Answered
How to mark the peaks of a signal based on some threshold value?
First, remove as much baseline drift and high-frequency noise as possible. That will make everything easier. I suggest using...

4 jours ago | 0

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Answered
surfc function : plot goes wrong
It would help to have representative data to experiment with. In its absence, try this — ylim([39.9 40.1]) Experiment wit...

4 jours ago | 0

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Answered
Make a semi sphere and identify the co-ordinates as the shown picture
I am not certain what you want to do. Calculating and plotting the rings corresponding to the required radii (0.66,0.89,0.99)...

4 jours ago | 1

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Designing a bandpass filter in Matlab
It took me a while to figure out what the problem was, and it turns out to be that the passband frequencies must be normalised b...

4 jours ago | 0

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Answered
How should my set my obtained answers into a table form?
Copying from my answer to your previous post: % Secant Method in MATLAB % a=input('Enter function:','s'); % f=inline(a) a =...

4 jours ago | 0

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Answered
Matrix index is out of range for deletion
This is the problem when deleting elements in a loop, although there could be a different problem, such as addressing a column v...

4 jours ago | 0

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Answered
How to shift the graph?
It is easier to use the buffer function for this — t = linspace(0, 250, 5000); s = exp(-0.01*t) .* sin(2*pi*t*700); figure...

4 jours ago | 0

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using find-command to find max or min value
This is relatively straightforward. Use max with two outputs: x = 0:13; y = randi(25,1,14)/100; [ymax,idx] = max(y) fi...

5 jours ago | 0

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Answered
How can I make a 3d
There are several ways to do that. One is to use the plot3 funciton, another is the waterfall function. t = linspace(0,5); ...

6 jours ago | 0

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How can I plot this GPS/GNSS signal
Use the plot function.

6 jours ago | 0

Answered
How to convert fprintf from single row to multiple rows?
There is not enough of the code provided to know what the problem is (and images of code are never appropriate, since actual cod...

6 jours ago | 0

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