Star Strider
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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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Feeds
How to flip a scatter3 plot?
I am not quite certain what you want. Perhaps this — xyz = rand(50,3) figure scatter3(xyz(:,1),xyz(:,2),xyz(:,3),25,xyz...
대략 12시간 전 | 0
Getting error installing Matlab on Linux
See this recent search for potential solutions.
대략 14시간 전 | 0
Fittg covid 19 SEIRD model
See: Parameter Estimation for a System of Differential Equations among other examples on how to do this.
대략 14시간 전 | 1
Why do I get conj(L)
The Symbolic Math Toolbox assumes all variables are complex, so it adds the conj to be complete. Specifying that the variables ...
2일 전 | 0
how to plot a certain level in a contour?
Extracting the contours for a specific level is straightforward. Try this — [x,y,c] = peaks(20); cilevels = [0.0,.005,0.01...
2일 전 | 0
How do you return computational time and memory allocated during function call?
There are a few functions you can use for timing, one of which is the tic, toc pair. Most current recommendations are to use du...
3일 전 | 1
how to plot (0 1) matrix on figure
I am not certain what you intend by ‘dot plot’, however the spy function exists to do just that, if you only want to depict the ...
4일 전 | 0
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Programmatically find fzero of two RCL functions
It seems that the curves don’t intersect. The ‘funcVR’ function never crosses zero, although the ‘funcVL’ function does — f...
5일 전 | 0
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Finding x and y values of minimum z in 2-variable function.
Is there a particular reason to use that sort of iteration? MATLAB has a number of optimization funcitons you can use, with fmi...
5일 전 | 0
way to legend a data organized into colours in simple plot?
I am not certain what you want. One option — first_data = [[3 4 8 1];[3 6 4 9]]; % desired legend (first) & color (green) ...
6일 전 | 1
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I'm trying to plot a graph with if than statements but keep getting the error "Array indices must be positive integers or logical values."
The definition of ‘positive integer’ are integers greater than zero. So use: for i=(1:n) instead of: for i=(0:n) There...
6일 전 | 0
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period segmentation of wrist pulse signal
See: Combining repetitive curves into one average curve for an example. This demonstrates how to segment them and also how to c...
7일 전 | 0
I am receiving an Error using plot
Use the matlabFunction function, evaluate it with ‘t’ and then plot — m1 = 49/1000; m2 = 31/1000; l1 = 0.5; l2 = 0.5; M = ...
8일 전 | 0
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How to create a sound like this?
Firstt, look to see what their spectrograms reveal — uz = unzip('examples.zip') for k = 1:numel(uz) fn = strrep(string...
9일 전 | 0
graph the function using ezplot() and plot()
Perhaps this — syms x y % 2y^2 = -3x^3+5x , -2.5≤x≤2.5. Eqn = 2*y^2 == -3*x^3+5*x % Add O...
10일 전 | 0
Using Fill between two curves semilog plot
If you are using flipud, you will need to vertically concatenate the vectors (that are presumably column vectors), so instead of...
10일 전 | 0
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Filtering a Single Column of One Table Based on Multiple Criteria from Another Table.
I’m not sure that I fully understand your problem, however the join function (or one of its friends innerjoin or outerjoin) may ...
11일 전 | 0
Too many input arguments
Plotting over ranges of ‘t’ and ‘u’ defines a surface, so create vectors for both of them, and use either ndgrid or meshgrid (th...
12일 전 | 0
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Edit window does not open in Ubuntu 24.04.2
There seem to be problems with the latest updates to 24.04 with respect to MATLAB. Yours is the third post I have seen on 24.04...
12일 전 | 0
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How to compute the characteristic equation given the eigenvalues?
The poly function can do that. Try this — A = randn(5) % Create Matrix e = ei...
12일 전 | 0
Suitable function(s) to be used for plotting the graph
Instead of using: plot(t,zz,'o-'), grid use: fplot(zz, [min(t) max(t)],'o-'), grid since ‘zz’ is a symbolic expression and...
13일 전 | 0
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Iam getting the following ERRO: Array indices must be positive integers or logical values on the following code.
You need to create the ‘q’ functions as Anonymous Functions and then call them as functions of ‘t’ in the plot calls. Try thi...
14일 전 | 0
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IFFT of frequency dataset
‘(not starting at 0)’ That’s probably the problem. Essentially your data are then a sort of rectangular-window-bandpass-fil...
14일 전 | 0
Plotting around zero deg. Angle
Aside from not having any image to work with, I am not certain what you want. First use plot to see what the problem may be. ...
14일 전 | 0
MATLAB R2023b gui in ubuntu 24 is not opening files after launch. Displaying some errors and shutdown
According to MATLAB and Simulink Requirements 24.04 is supported. It would be best for you to Contact Support for installatio...
15일 전 | 0
Problems at start in ubuntu 24.04.2
According to MATLAB and Simulink Requirements 24.04 is supported. It would be best for you to Contact Support for installatio...
15일 전 | 0
xlabel and ylabel errors
This is instructive: when I run it brings the following error Index exceeds the number of array elements. Index must not ex...
15일 전 | 0
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Sending Multiple Data to Excel from MATLAB?
If you have R2013b or later, collect the data you want in a table, configure the table the way you want it, and then use the wri...
15일 전 | 0
How to code an equation with that integrates a vector.
Siince ‘u’ is also a vector — u = @(t) [sinh(t); cosh(t); tanh(t)] int_u = integral(u, 0, 1, ArrayValued=true) A = rand B =...
15일 전 | 0
update guess in fsolve
I am not certain what you are actually asking. If possible (if an equation can be plotted), I usually begin by plotting iit t...
15일 전 | 1
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