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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
My scatter plot points aren't showing up on my main line plot.
Perhaps something like this — [s2max,s2idx] = max(s2); [s3max,s3idx] = max(s3); figure hold on scatter(t(s2idx),s2max,'o...

10 hours ago | 0

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Answered
Can not calculate coefficient Accurately
Only request the coefficients of ‘X2’ and then divide ‘EQ_01(2)’ by ‘X1’ — syms X1 X2 Disp = X1*(4*X2 - 4*X1 + 1) [EQ_01, T...

22 hours ago | 0

Answered
Is there any example of Range-Speed Response Pattern in MATLAB or how can i crate one?
See the Phased Array System Toolbox documentation section on Range and Doppler Estimation and then choose the appropriate sectio...

22 hours ago | 0

Answered
Extracting certain set of points from a 3D plot
I would use the contour function for this. Example — [X,Y] = ndgrid(-3:0.1:3); f = @(x,y) exp(-(x.^2+y.^2*3)*0.75); Z = ...

2 days ago | 0

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Answered
baseline correction of raman data
The general approach (that has worked for me before) to correct spectrum baselines is to identify specific local minima, fit a c...

2 days ago | 0

Answered
Reduce the number of peaks from findpeaks command?
The findpeaks function has a number of name-value pair arguments that you can use. The two I use most often are 'MinPeakPromine...

3 days ago | 0

Answered
See if datetime is within range
I do not entirely understand what you want to do. One approach — D1 = {'3/25/2024 15:01:15' 1 '3/25/2024 15:01:31' 2...

3 days ago | 0

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Answered
how to use multiple '%c' on each variable ?
Add ‘VariantFy’ as an argument to the function as ‘L28’ (or whatever you choose to call it): function writefile(C,L28) and ...

3 days ago | 0

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Answered
Problem while attaining the coefficent of variable
You need to specify more terms in your coeffs call. The problem is that then the polynomial separates into two separate polynom...

4 days ago | 0

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Answered
histogram on data graph
One option (if your data were a scatter plot) would be the scatterhist or scatterhistogram functions. Otherwise, perhaps some...

4 days ago | 0

Answered
Add a bar above a character in axis labels
Try this — figure ylabel('$\bar{c}$', 'Interpreter','latex') .

4 days ago | 1

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Answered
'readtable' in 2023 version error (This issue did not occur in 2018)
I do not understand ‘2023b the array only has many 3’, however I believe that the shortened table display in the last few releas...

5 days ago | 0

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Answered
Removing instantaneous jumps (outliers) from a time series data set
There are several functions to detect and remove outliers, depending on how you want to define them and deal with them. Here ...

6 days ago | 0

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Answered
Rate of Force Development for Isometric Mid-Thigh Pull
The denominator is a vector, so you need to use element-wise division (./) instead of matrix division (/) — rRFD = (r_Peak - r...

6 days ago | 0

Answered
Substitution of symbols in equation after their values are being calculated
Try this — syms yApprox(X1) a0 a1 a2 a3 a4 a5 a6 syms a2 a3 a4 a5 a6 EQ_01=a2 +9*a3 + 72*a4 + 540*a5 + 3888*a6 == -121/36000...

7 days ago | 0

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Answered
How to create separate data for daylight hours and nighttime hours in MATLAB?
It would be best to begin by importing your data to a table using the readtable function. The date and time values (whatever th...

7 days ago | 0

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Answered
How to Extracting Only Surface Coordinates from a 3D STL File in MATLAB?
See if the trisurf function does what you want — Uz = unzip('22G teardrop COMSOL.zip'); filename = Uz{:}; [TR,fileformat,att...

7 days ago | 0

Answered
Facing Problem while solving Linear Equations simultaneously
The only correction required to get this to run is to add the syms declaration — syms a2 a3 a4 a5 a6 EQ_01=a2 +9*a3 + 72*a...

7 days ago | 0

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Answered
Seeking Guidance on Electrophysiology Data Analysis: Data Smoothing, Baseline Adjustment, and Graph Overlay
There are probably several ways to do what you want, depending on what that is. To remove a wandering or non-zero baseline, o...

7 days ago | 0

Answered
How to obtain the standard deviation of the fitting parameters?
The most meaningful measure of the parameters is the confidence interval. You could possibly recover some information from the ...

7 days ago | 0

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Answered
What is the best way of calculating the path length of a freely moving tracked animal.
What you probably want is a line integral. This integrates the hypotenuse of simultaneously varying elements along a level path...

8 days ago | 0

Answered
Converting xlsx files to frequency domains using the fft algorithm
Try this — T1 = readtable('120mm.xlsx') VN = T1.Properties.VariableNames([1 4:end]); t = T1{:,1}; s = T1{:,4:end}; Ts = ...

8 days ago | 2

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Answered
creating a plot of one cycle from multipel cycles
This is called an ‘ensemble average’. One approach to it (I have posted several times on these problems) is in Combining repeti...

8 days ago | 0

Answered
I am trying to solve a system of three differential equations simultaneously
It ‘sort of’ has an analytic solution (if you want to let it run for a while, and then can make sense of that result), however i...

8 days ago | 0

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Answered
Solving a system of differential equations with a variable stored in an array
The value does not cause the curves to vary much. There may be other problems with your initial conditions for the outbreaks ...

9 days ago | 0

Answered
HD-sEMG data segmentation
Use the Signal Processing Toolbox buffer function on each column individually. The number of samples to use as the second arg...

9 days ago | 0

Answered
How to set as preferences radiant instead of degrees?
Functions have their own defined preferences. For example polarplot, sin, cos, tan, and most others require radian angle argume...

10 days ago | 0

Answered
italicize only a part of the legend
Use \it to begin it an \rm to end it. If you are doing that in an sprintf call, use \\it and \\rm respectively. text(0.4, 0...

11 days ago | 1

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Answered
import data from csv file with same format of stored data in file
The data are imported and stored with their original precision. They are just displayed with 4 digits to the right of the decim...

11 days ago | 0

Answered
How to exported formatted text and create files in array with specified variables ?
There are several ways to do this — VariantModel = compose('%c', 'A':'E') files = sprintf('''Model%c.$2k'' (or it may be .txt...

11 days ago | 0

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