# Star Strider

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)

**Content Feed**

Plot complex signal with imaginary and complex

This is relatively straightforward — Fs = 1000; Tlen = 10; t = linspace(0, Tlen*Fs, Tlen*Fs+1)/Fs; s = exp(1j*t*2*pi); R...

42 minutes 前 | 0

Plotting 3D by rotate 2D plot around y-axis

Probably the easiest way is to define a cylinder and a shape vector — yv = [linspace(0.3, 1, 50)]; ys1 = yv.*exp(-1.75*yv)*5;...

3 hours 前 | 1

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...

14 hours 前 | 0

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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...

20 hours 前 | 0

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 day 前 | 0

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 day 前 | 0

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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...

2 days 前 | 0

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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...

2 days 前 | 0

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...

3 days 前 | 0

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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...

3 days 前 | 0

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 ...

3 days 前 | 0

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 days 前 | 0

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 days 前 | 0

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 days 前 | 0

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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 days 前 | 0

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...

4 days 前 | 0

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 days 前 | 0

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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 days 前 | 0

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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 days 前 | 1

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Transform matrices to XYZ

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

5 days 前 | 0

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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 days 前 | 0

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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...

6 days 前 | 0

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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...

6 days 前 | 2

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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...

6 days 前 | 0

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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 days 前 | 0

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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 days 前 | 1

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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 days 前 | 1

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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 ...

7 days 前 | 0

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...

7 days 前 | 0

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...

7 days 前 | 0

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