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Star Strider


Last seen: Today
14 675 total contributions 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

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Answered
How do I fix my legend?
For every plot call, return a handle: h1 = plot(a1,b1,'ko','LineWidth',3); . . . h2 = plot(c1,d1,'bo','LineWidth'...

ungefär 3 timmar ago | 0

| accepted

Answered
Extract hourly data from minute data over a year
Try this: T1 = readtable('weather_data_2019.txt'); Idx = minute(T1.Datetime) == 0; OutTable = T1(Idx,:) producing (for this...

ungefär 6 timmar ago | 1

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Answered
How can you make an input to a symbolic variable?
Try this: varprompt='Enter Variable (space-separated):'; var=inputdlg(varprompt) v = regexp(var, ',', 'split') syms(v{:}) ...

ungefär 7 timmar ago | 0

Answered
How to plot both real and imaginary part of complex exponential?
See my Answer to your duplicate Question: How to plot both real and imaginary part of complex exponential?

ungefär 7 timmar ago | 0

Answered
Numerical integration in MATLAB
Try this: c = @(T) (h.^2 .* D) ./ (2 .* pi * pi * vs * kb .* T .* T); fun = @(x,T) ((x.^4 .* exp((h.*x) ./ (kb .* T))) ./ (((...

ungefär 9 timmar ago | 0

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Answered
Interpolate NaN on graph
If the data have NaN as the value of the dependent variable, and the independent variable is continuous (with no NaN values), th...

ungefär 9 timmar ago | 0

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Answered
Finding all the zeroes of a discontinuous function in a particular range
It may be version-dependent. In R2020b (Update 1), I get: extrema = 13.3333 -1.0 ans = -26.666666666666666666666...

ungefär 10 timmar ago | 0

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Answered
EMG bandpass filter to remove 50 Hz power line
With a sampling frequency of 10 Hz, the highest frequency that can be uniquely represented is 5 Hz, which is much too low for an...

ungefär 10 timmar ago | 0

Answered
error in my code
The way you coded ‘R’: R=1000*[5, 100, 200, 250]; it only has 4 elements. Nothing exists beyond ‘R(4)’.

ungefär 12 timmar ago | 1

Answered
Finding Best Fit for Log Scaled Graphs
It is best to fit the power function using a nonlinear approach: x = [0, 0.00027036151034654, 0.00115093883458806, 0.002234322...

ungefär 12 timmar ago | 0

Answered
How to plot both real and imaginary part of complex exponential?
For best results, replace ‘j’ with ‘1j’, then convert the result to double to use plot (since fplot is likely to be more difficu...

ungefär 14 timmar ago | 1

Answered
Changing the legend color
Try something like this: y = linspace(0,50,50); % Create Data v = 1:14; ...

en dag ago | 0

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Answered
plotting concentric circles using contour
Use the axis function, specifically either: axis('equal') % Function Expression or: axis equal ...

en dag ago | 0

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Answered
Graph help in matlab
This is not your function, however it illustrates the ‘logical indexing’ approach to such problems: f = @(x) (2-2*x).*(x <= 0)...

en dag ago | 0

Answered
Pseudo Element by Element Vector Subtraction
See if this does what you want: C1 = A(:,1).' - B(:,1); % Col #1 In ‘A’ - Col #1 I...

en dag ago | 0

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Answered
Numbers in command window printed 10000 times smaller
I suspect there is an exponent indication out-of-view in the image you posted. When I read and reshape your file as in your p...

en dag ago | 0

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Answered
How to write Pearcey functions?
I would code them as: Pe1 = @(x) integral(@(s) exp(1i*(s.^4 + s.^2.*x)), -Inf, Inf, 'ArrayValued',1); Pe2 = @(x,y) integral(@...

en dag ago | 0

Answered
Is there any ways to find all elements' rows and cols number at once?
Meet the size function!

en dag ago | 0

Answered
Separate a time signal for each frequency
The pspectrum function (introduced in R2017b) with the 'spectrogram' type may be what you want. It produces a spectrogram plot ...

en dag ago | 0

Answered
Error when using fminsearch to find least squares fit of data using a given equation
I can’t figure out from your code what your independent and dependent variables are. As a general rule, the argument to fmins...

en dag ago | 0

Answered
How do I convert a transfer function of a low pass filter to bandpass?
If you want to use the Signal Processing Toolbox functions, this works: syms s; N=4; for k=1:N w=((2*k+N-1)/(2*N))*pi; ...

2 dagar ago | 0

Answered
Designing a bandpass filter
See if the bandpass fucntion works for you.

2 dagar ago | 0

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Answered
How to select every second number from a file of numbers separated by a comma
I looked at ‘UE1.txt’ and I initially could not make any sense out of it. It’s apparently supposed to be a multi-channel record...

2 dagar ago | 0

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Answered
plotting a graph with different conditions using if statement
Your code can be made significantly more efficient by using vectorisation and ‘logical indesing’: mu_a1 = 0.1; %absorption coe...

2 dagar ago | 1

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Answered
Deleting Some initials of The Matrix
It depends on the functions you have available. It appears to be a text file, so one option would be textscan: fidi = fopen('...

3 dagar ago | 0

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Answered
Requesting help for piecewise ploting
The Symbolic Math Toolbox and here particularly the piecewise funciton may not be the best option for this problem. Use ordin...

3 dagar ago | 0

Answered
Need Help New to MATLAB
To make them not be fractions, use vpasolve or vpa on the result: F2s = vpasolve(Fwy+F1y+F2y == 0,F2) F1s = vpasolve(Fwx+F1x+...

3 dagar ago | 0

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Answered
Matlab returns empty symbol when solving laplace transform
Try this: syms s t C1 C2 R1 R2 i(t) I(s) eqn(t) = 0 == R1*i(t) + R2*i(t) + diff(i(t), t)/10 + int(i(t), t)/C1 + int(i(t), t)/...

3 dagar ago | 0

Answered
Ploting an anonymous function
It appears that ‘Cw’ also needs to be an anonymous funciton, however it is absolutely not obvious what variable it supposed to b...

3 dagar ago | 0

Answered
Need the function or Equation that solve this kind of questions?
This is not your function, however it illustrates the ‘logical indexing’ approach: f = @(x) (2-2*x).*(x <= 0) + (2+2*x).*(x>0)...

3 dagar ago | 0

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