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Star Strider


12,095 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

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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Answered
Steps after ICA on unknown signals
ICA is not going to tell you that, because it does not know. It simply separates the signals. You must then so whatever sort o...

약 1시간 ago | 0

Answered
how do I plot different 3D peaks in different locations in single polar plot
Try this: N = 500; rv = linspace(0, 1, N); % Radius Vector av = linspace(0, ...

약 3시간 ago | 0

Answered
bar plot cannot spread x axis homogeneously
Either add a xlim call, or define both axes limits at the same time, and replace your ylim call with an axis call: axis([0 20 ...

약 10시간 ago | 1

| accepted

Answered
How to plot LSQCURVEFIT output
It is not easy to follow your code. In order to use the linspace result, you need to put ‘xdata’ in your ‘GlobalChiSq’ functi...

1일 ago | 0

Answered
How to use Maths Font for Graphs in MATLAB
I’m not certain what you want. The text objects have an Interpreter name-value pair argument that ill allow you to do annotat...

1일 ago | 0

Answered
For loop index assistance
I do not understand the reason you are indexing ‘j’ as a for loop. I would do something like this to get consecutive ‘j’ vect...

2일 ago | 0

Answered
find() not as expected
You have encountered ‘automatic implicit expansion’ introduced in R2016b. The result you get from your equality expressions wil...

2일 ago | 0

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Answered
Plotting hyperplane created using meshgrid (something simple)
I am not certain what you want to do. One approach: N = 25; y = linspace(-20,0,N); x = linspace(-50,50,N); z = linspace(...

2일 ago | 0

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Answered
how to plot ellipsoid?
Try this (partially copied from the documentation page Connecting Equal Values with Isosurfaces): x = linspace(-10, 10, 50); ...

2일 ago | 0

Answered
Sigma notation with matrices
Taking a wild guess: x = rand(1,4); % Create Vector C = rand(4); ...

3일 ago | 0

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Answered
Weighted fit of ode's to data?
Unless you have a good reason to weightcertain varriables, (for example you are using values from the literature that are given ...

3일 ago | 0

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Answered
Fitting a series of coupled ODEs to a dataset with fminsearch
First, please do not use global variables! Pass your data as parameters instead. That way, you know what you’re giving your fu...

3일 ago | 0

Answered
fmincon is giving better results than ga for a nonlinear constrained optimization problem.
The ga function produces its best results if you override the default population matrix with one of your own. I always use an o...

3일 ago | 0

Answered
How to use continue to skip the rest of the iteration and go to the new iteration?
Cannot run your code. It depends on what you want to do. Note that continue ‘passes control to next iteration of for or wh...

4일 ago | 0

Answered
how to solve these equations
You already formatted them to work with the Symbolic Math Toolbox (unless the ‘==’ means a logical operation), so: syms a b c ...

4일 ago | 0

Answered
Extracting data based on categories
The splitapply function (R2015b and later releases) is perfect for this! z = {'01-Jan-1973' 0.0114583333333333 '01-Jan-1...

4일 ago | 0

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Answered
Extract numerical values from structure
One approach to extracting the numerical values from the cell array of strings that inputdlg returns here is to add an assignmen...

4일 ago | 0

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Answered
fft of sin(pi*x/5)./(pi*x) returns NaN
When ‘x’ is 0, ‘G’ becomes 0/0, and the IEEE standard defines that as NaN. Any NaN in a vector will propagate through all calcu...

4일 ago | 1

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Answered
Certain functions not available.
The ischange function was introduced in R2017b. Your best option would likely be to upgrade to a more recent release. Workar...

4일 ago | 0

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Answered
standard separation of x axis tick marks
Plot them using semilogx: % Output Variable Section: subplot(1,2,1) semilogx(omega,decibels),xlabel('Omega (rad/s)'),ylabel(...

4일 ago | 0

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Answered
How to amplify the signal?
Multiply the vector or matrix by a constant greater than 1, and use the sound (not soundsc) function to listen to it.

4일 ago | 0

Answered
Editor window not opening in Matlab
There is a small white down-pointing arrow in a white circle in the upper right corner of the Editor toolstrip. Among the optio...

5일 ago | 1

Answered
Don't understand sequences or how to process them in a function.
You are overshadowing the function flip. It’s best not to do that. Name your function something else, such as ‘myflip’ or so...

5일 ago | 0

Answered
Plotting the orientation of lines
Try this: A = [99.1862290400000 102.281400300000 97.1587243900000 97.3460346000000 104.227574300000 8...

5일 ago | 0

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Answered
I want to save all the values of e1 and e2 and then I want to plot them
There are several ways to approach this. This causes the least disruption to the code you posted: n = 0.22; r = 0.9; av =...

5일 ago | 0

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Answered
How to convert .csv file into audio file
Using numbered variables is never a good idea. Do this instead: T=readtable('2khz.csv'); A = table2array(T(:,3:8)); Then,...

5일 ago | 0

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Answered
Probelm with 'writecell'
Try this: m = readcell('rawdata.csv'); writecell(m(2:end,:), 'modified_data.csv'); If that does not work, upload (attach) ‘r...

6일 ago | 0

Answered
Plotting a bivariate function and a tangent line on the same graph
To plot them simultaneously, you need to use the hold function. See if this does what you want: f = @(x,y) x.^2 + 3*(x.^2)....

6일 ago | 0

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Answered
Apply Chebyshev filter to sea surface temperature (SST) data
‘I do not understand what should be the inputs for my problem.’ There are several different filter types. The Chebyshev desi...

6일 ago | 0

Answered
Convert Differential Equations to Spate Space
In order to convert your equations to a state-space representation, you need to linearise them. This involves taking the Jacobi...

6일 ago | 0

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