Community Profile # 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.

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What do I need to fix in this code to get the maximum value?
This is at least the second time (the first that I°m aware of is how to get maximum value of this code) you’ve asked the same qu...

10 minuter ago | 0

how to get maximum value of this code
Important parts of the code appear to be missing. However to get the maximum, negate the function — f = @(x) sin(x); x0...

ungefär en timme ago | 0

how to apply pso to formula
The parameters have to be elements of a vector (and the appropriate operators must be provided, in this instance multiplication)...

ungefär 2 timmar ago | 0

how can i extract the last two digits of a big number e.g 2454152
One approach — number = 2454152; Out = rem(number,100) .

ungefär 17 timmar ago | 1

Calculation of rise time of skin conductance data
The data are certainly available, however making sense out of them is difficult. Is there a time vector? The risetime func...

ungefär 18 timmar ago | 0

Check for coordinate pairs matches in .mat file
If I understand the problem correctly, the ismember function may be appropriate — List = randi(9, 10, 2) toMatch = randi(9, 1...

ungefär 18 timmar ago | 1

How to store images in an array ?
I’m not certain what you’re doing. I’ve not done anything similar in a while, however see if the getframe function will do wh...

ungefär 20 timmar ago | 0

Why isnt plot working for this code?
It will work with the for loop if (1) the plot call plots points instead of lines, or (2) if the values are subscripted inside t...

ungefär 22 timmar ago | 0

Approximating sharp changing time dependent term for use with ODE solver
The documentation secion on ODE with Time-Dependent Terms uses interp1 that also has a number of different methods to do the int...

en dag ago | 0

Solve equation with multiple values for V
Another approach — Vr = 12; Vi = 3; Pr = 5000; syms n V = [3;3.5;4;4.51;5;5.5;6;6.5;7;7.5;8.01;8.5;9;9.5;10;10.49;10...

en dag ago | 0

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How to extract data with multiple headerlines locations, with a differing number of headerlines per file?
My apologies, however this has to be the most inelegant code I ever wrote. It has the virtue of being able to read the posted...

en dag ago | 1

How can i replace a string to a numeric value in a specific column of an array ?
I am not certain if ‘string’ refers to character vectors or string variables. Try this — column = ['M';'B';'M';'M';'B';'B']...

2 dagar ago | 0

Finding the turning point on the left side of a peak
‘... the turning point on either side of the major peak’ Those are referred to as the Q and S deflections (or waves). Th...

2 dagar ago | 0

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Help. Plot graph calculation
A somewhat more analytic representation — x = linspace(-1, 3, 250); y = (x).*((x >= 0) & (x < 1)) + (2-x).*((x >= 1) & (x < 2...

2 dagar ago | 0

Changing color of plot
Alternatively, using logical indesing — x = -10:.01:10; y = sin(x); dy = gradient(y); ...

2 dagar ago | 0

Solving for angle (Beta) using vpasolve
That’s the result I get when I solve it (and then correct it by ) — M1 = 3; P1 = 1; theta2 = 5; thetha3 = 20; gamma = 1....

3 dagar ago | 0

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extract especific rows from matrix
One option — c = [202002041000 25 202002041015 35 202002041030 54 202002041045 ...

3 dagar ago | 0

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How can I get a time versus amplitude graph from the waveform.
The spectrogram function returns amplitude (the ‘z’ axis of the rotated surf plot) in units of dB/Hz, so it will not produce the...

3 dagar ago | 1

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Issue with Quiver plot
I have absolutely no idea what the desired result actually is. One option: negate ‘x2’ Another option: set(gca, 'XDir','r...

3 dagar ago | 0

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How to use duration data in the x axis of a patch graph?
Post the code and post the MATLAB version you are using. Only in the last 2 releases (that I am aware of) has patch supported d...

3 dagar ago | 0

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smooth step function with rise time
It occurred to me that one option would be filtering the original signal to ‘round off’ the sharp transitions. I first tried a ...

3 dagar ago | 0

What do I do next to solve for m?
The conditions only apply if the values of the constants are not defined first. Try this — syms f m g L I f = sym(0.1); ...

4 dagar ago | 1

dirac() and ode45 issue
I doubt that the dirac call is actually necessary. The code works correctly without it — tspan1 = 0:0.00000001:0.01; x0=...

4 dagar ago | 0

Trouble with symbolic integrals
Since the desired result is numeric, use vpaintegral — syms x; f = exp((x^2-1)/2)/(1-x^2)^0.5; int_f = vpaintegral(f,-1,1)...

4 dagar ago | 0

Plot figures in the same figure (MATLAB)
Add the second matrix to the code, concatenate it with ‘H’ along dimension 3, then use a for loop to address and plot them. H...

4 dagar ago | 0

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How to extract symbolic parts and corresponding constant values with division in symbolic polynomials?
I cannot find any function that would return the desired result, however ther are other options, a few of which are — syms x...

4 dagar ago | 0

How to plot multiple y values for a single x value
The plot function figures this out automatically — A = randn(512,10); x = 1:10; figure plot(x, A, '.') xlim([0 11]) ...

4 dagar ago | 0

INDEX IN POSITION 1 EXCEEDS ARRAY BOUNDS (MUST NOT EXCEED 3)
These — for i = 1 : n Sum = 0; for j = 1 : n should instead be — for i = 1 : size(a,1) ...

4 dagar ago | 0

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find the intersection of the four corner and trim the value out of the corner
Solve for the intersections, then plot to those limits — grid on syms stress1 stress2 shear12 SL_Ts=1800; SL_Cm=1400; ST_T...

5 dagar ago | 0

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