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
Unable to find symbolic solution
The system is nonlinear, so it quite likely does not have an analytic solutioon. Try something like this— syms y(x) x Y D...

ongeveer 5 uur ago | 0

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Answered
Using histcounts to determine loose data mode
I am not certain what you want to do. The histcounts function has a third output bin that will index into the elements that w...

ongeveer 11 uur ago | 0

Answered
Find kinetic constants from differential equations
Some examples: Monod kinetics and curve fitting , Parameter Estimation for a System of Differential Equations , and there are s...

1 dag ago | 0

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How do you indicate the order of plotted points in a polar plot?
Unforutnately, quiiver and polaraxes don’t work together. The only alternative is to create your own polar axes as Cartessian a...

1 dag ago | 0

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Answered
How to calculate respiratory rate from a Doppler radar signal
Perhaps something like this — LD = load(websave('radar_signal','https://www.mathworks.com/matlabcentral/answers/uploaded_files...

1 dag ago | 0

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Answered
Where to find changes in functions in Matlab versions?
See: Release Notes, however that only goes back as far as R2018a. I am not certain that other documentation exists online, alth...

1 dag ago | 0

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calculate the maximum of every 24 data in matrices
If the times are in (or can be converted to) datetime arrays, one option would be to transpose the matrix so that the sensors ar...

2 dagen ago | 0

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Answered
How do I fill legend on double y axis plot?
Without seeing your code (and your MATLAB version, although I’m not certain how relevant that is in this instance), it’s not pos...

2 dagen ago | 0

Answered
How to improve speed of interp1 in for loop?
I’m not certain that I follow what you’re doing. However if you know the ‘inputValue’ and you want to find the closest indices ...

2 dagen ago | 0

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plot function legend is wrong.
The legend is probably picking up the first line plotted, that by default is blue. Perhaps this — figure (55) for i = ...

3 dagen ago | 0

Answered
Upgrading R2021b to R2023a, Need Instructions
There is no actual ‘upgrade’ involved. Simply download R2023a (choose to create the desktop icon if that is available with your...

3 dagen ago | 0

Answered
How to remove the horizontal line from my NMEA plot ?
With no file or other information, the problem may be that there is a common value (possibly 0) that separates segments of the f...

3 dagen ago | 0

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Answered
i have a syntax error in this expression : Vs+K*(C/(C-(u(1)*u(2)))*u(1))+R*u(1)-A*exp((-B/C)*u(1)*u(2))
Checking it with the Symbolic Math Toolbox, it appears to be correct. The only suggestion I can offer is to use element-wise op...

3 dagen ago | 0

Answered
The numbers do not appear in standard format despite the writing (format shortG)
One option is to use string arrays — format shortG Mf=6.480554950317725e+03; Cp_sea=3.976; t_out=100; t_in=25; Qu=Mf*Cp_s...

3 dagen ago | 0

Answered
What does this means?
It returns the elements in from rows 1 and 3 in columns 1 and 2 — G= [ 1 2 3; 4 5 6; 7 8 9]; H= G([1 3], [1 2]) .

4 dagen ago | 0

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Answered
ytickformat('percentage') not working with latex interpreter
This: ytickformat('$%g \\%%$') seems to work — figure(1) plot(1:100) ytickformat('percentage') figure(2) % This is th...

4 dagen ago | 0

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Answered
Periodogram of my audio file gives magnitudes only below zero
That you can hear it simply means that the sound card is scaling it and amplifying it. (I have no idea what the actual amplitud...

4 dagen ago | 1

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Answered
Transform matrices to XYZ
Something like this should work — [Lat,Lon] = ndgrid(lat,lon); LatLonDepth = [Lat(:) Lon(:), depth(:)]; Since I do not know ...

4 dagen ago | 0

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Answered
How can I open an Oxfor Instrument Pulsar .fid file in MATLAB?
Use zip or a non-MATLAB version of it to create a zip file that encloses the file you want to read, then upload it here. I hav...

5 dagen ago | 0

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Answered
Separate time series data in Individual Months
It’s not necessary to determine the beginning and dne of each month to separate them. This approach uses the ymd function wit...

5 dagen ago | 0

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Answered
Plotting X,Y,Z Data
With a bit of help from accumarray, it is possible to separate the traces so that there are no connecting lines — Matrix = rea...

5 dagen ago | 2

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Answered
How to merge plots from different scripts
I do not see the attachment. However the easiest way mightr be to save the data from each script to .mat files, and then load...

5 dagen ago | 0

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Answered
Is it possible to calculate variating signal frequency?
Theere are likely several ways to analyse this. One option is to use findpeaks to get the distances between peaks. Another i...

6 dagen ago | 0

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Answered
When using xline, would it be possible to have the text in one color and the lines in another color?
Doing that in one pass is likely not an option, since there is no way to independently control the text colour. However colouri...

6 dagen ago | 1

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Answered
How to add different texts in xline, when using arrayfun ?
Perhaps something like this — fig = figure(); ax = axes(fig); ax.XTick = 1:14; dy = ["S","S","M","T","W","T","F"]; hxl = ...

6 dagen ago | 1

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Answered
Plot shows markers, but no lines, no matter what is being plotted
The code is also being run in R2023a, since that just released. If you are using the pre-release version, consider downloading ...

6 dagen ago | 0

Answered
Compare two CDF distributions
I am not sure that either of those tests would be appropriate for these data. A1 = readmatrix('https://www.mathworks.com/matl...

6 dagen ago | 0

Answered
Problem adding text to plot, background color doesn't work properly
The line does not through the label. However it is necessary to specify the label in the xline call — xl = xline(0.5,'-','X-L...

6 dagen ago | 0

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Answered
How can I get the maximum slope of a curve?
The file is not a .mat file. That problem aside, I would calculate the instantaneous slope as: m = gradient(Cell_Voltage_1...

7 dagen ago | 1

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Answered
How to decide order for fir1 band pass filter. Is there any methodology on which basis I can finalize the order to be considered for filter creation.
I usually use kaiserord when I design FIR filters. It calculates the appropriate order as one if its outputs.

7 dagen ago | 0