# Star Strider

Last seen: Today 2012년부터 활동

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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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Unable to recreate k-means clustering example
It works correctly in R2024a. (The online documentation reflects the latest update to the current release, and may not run cor...

1일 전 | 1

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Determining optimal cut off frequency
‘I have been told to filter at a range of frequencies and then calculate the RMSD between the original and filtered data.’ I ...

1일 전 | 0

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Seasonal decomposition of a daily time series
Your data are not regularly-sampled, so it is necessary to use the funciton on them first. After that, calculate the Fourier t...

2일 전 | 0

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Index exceeds the number of array elements. Index must not exceed 101.
I am not certain how to get these into a form that the MATLAB ODE integrators could use, so I did the next best thing, and calcu...

2일 전 | 0

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integrate with the upper limit is a function
The Symbolic Math Toolbox appropriately considers an otherwise undefined function. Define it and you get an actual result — ...

4일 전 | 0

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Understanding using the Plot() and troubleshooting with R2024a
If ‘eo_act’ and ‘ei’ are vectors with at least 40 elements, perhaps this — plot(eo_act(1:Ts:40), ei(1:Ts:40), 'r') Note that ...

4일 전 | 0

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want to plot a function
Subscript ‘H’ in the loop, then create ‘f’ tto have the same size as ‘H’ and then plot — fv = 0:10:60; tk=0.1; tK=4; theta0...

5일 전 | 0

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How to fill missing time points from a txt file
The tables may need to be manipulated a bit first. I put relevant times in the first column in ‘T1r’. After that, converting...

6일 전 | 1

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EDITED : Generate sphere whose center is not at origin

6일 전 | 0

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Any ideas for making this exponential decay function match the actual data better?
It would help to have the data. I would estimate all the necessary values as parameters: funlist = @(b,t) b(1) .* exp(-b(2)....

6일 전 | 0

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Error Using Rainflow fonction
The rainflow function only takes vector arguments. What result do you want? In the interim,try this — T1 = readtable('Da...

6일 전 | 0

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sorting values of a matrix column when the other column has the same value
Use the sortrows function, sorting the first column then the second column — A = [0.1 0.1 ; 0.1 -0.3 ; 0.1 0.5 ; 0.1 0; 0.1 -0...

6일 전 | 0

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How to set up the Matrix variables to use Options = optimoptions('lsqcurvefit','algorithm','levenberg-marquardt')
I am not certain how ‘M1T’ and ‘M2T’ enter into this, however witth the ‘K’ values as the independent variables, and the ‘M’ val...

7일 전 | 0

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how to create vector 1 1 1 1 1 1 2 2 2 2 2 2?
An alternative approach — v = reshape(ones(6,1)*[1 2],1,[]) .

8일 전 | 0

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Integral2 MATLAB Function Error: Q = integral2Calc(fun,xmin,xmax,yminfun,ymaxfun,opstruct);
Note that because ‘zprime’ only enters into your calculations in ‘R’ and that is defined as: R = sqrt(a^2 + (z_prime - z_prim...

8일 전 | 0

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Always Error is seen
Without your code I obviously cannot determine what the problem is or how to solve it. If you have three vectors and you wan...

8일 전 | 0

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Extract the information of inside and outside of a contourf
Tthey are in ‘pippo1’ . In order to extract them, you need to know the level. The ‘pippo1’ matrtix is arranged as: pippo1 ...

9일 전 | 0

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Reading a text file using readtable, Matlab stubbornly refuses to accept dates in anything but US-format
You need to pass the options structure to readtable. Perhaps something like this — type('Dave_2024_07_26.txt') opts = d...

9일 전 | 0

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Adding sigstar to grouped bar graph
I am not certtain what you are asking, and you did not post your MATLAB release. (Itt would help to have your datta, the code y...

9일 전 | 0

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contour plot problem Z must be at least a 2x2 matrix
Anotther option, using the scatteredInterpolant function — x=[80;100;90;90;90] y=[4;4;2;6;4] [X,Y] = meshgrid(x,y); % Polly...

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islocalmax('flat selection') selecting 0 value points
In the lower plot image, if you are referring to the collection of orange asterisks before the start of the variable section (fo...

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Fit meta data to a custom equation
@Yang Hu — Your regression equation essentially produces a linear fit to your data. I ran selected columns through the genetic ...

11일 전 | 0

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I don't know what this means
I always use unzip by unzipping it into a variable. That would be : uz = unzip('MerchData.zip') for this file, and then pr...

12일 전 | 0

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scale x,y and z axis to match JPL Database
I’m not certain how to use that site, so I don’t know what the plots look like. Probably the function that will best do what ...

12일 전 | 0

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Representation of Gabriel's Horn
If you want it to look more like the image you posted in your question, one option is to use the daspect function.. It allows yo...

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Running a large array
See the documentation section on Tall Arrays (introduced in R2016b). I have rarely needed to use them, so I have little exper...

13일 전 | 0

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How to make bar plot with group mean and add scatter plot on top to demonstrate samples within group?
Apparently the group means are the heights of the bars. Try this — MC1 = randn(50,2)*10 + [80 81]; ...

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how to do a contour plot using function handle?
Provide arguments to ‘M’ and it works — T=linspace(0,2*pi,100); d = linspace(0,2*pi,100) ; [X,Y] = meshgrid(T,d);...

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Eliminate the long number appearing in symbolic calculations
You can conttrol the number of digits displayed by including a second argument (here 7) to your vpa call — syms J1 term = ...

16일 전 | 1

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Finding a a path between two points on a 3d surface that proceeds through lowest value points.
I am not certain what you wantt, and I doubt there is a way to impoose the energy constraints on the path. (The shortestpath fu...

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