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Star Strider


Last seen: Today
14 037 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
How can I insert a separate line of text with inputdlg?
Try this: dlgtitle = 'Please fill in the following variables: '; prompt = {'Age','Height','Weight'}; vc = inputdlg(prompt, d...

environ 2 heures ago | 0

Answered
Error using detrend. Too many output arguments
You are asking detrend to remove a linear trend. To get the slope and intercept of your data, use the polyfit function. Ther...

environ 4 heures ago | 1

Answered
What is the meaning of a KW in a specification of a grid?
Think about it. Power (kW or kVA) is voltage multiplied by current. There is no current if there is no load.

environ 6 heures ago | 0

Answered
Problem in statistical test
The terminology can be confusing. From the Wikipedia article Null hypothesis (Basic definitions): "The statement being tested...

environ 6 heures ago | 0

Answered
Solver Profiler: Operands to the || and && operators must be convertible to logical scalar values
That error occurs when the variables to be compared using the ‘short circuit’ operators ‘||’ or ‘&&’ are vectors rather than sca...

environ 15 heures ago | 0

Answered
Non linear noise on ecg signal
See: Contaminate an EMG with 50 Hz signal for one example.

environ 16 heures ago | 0

Answered
plot a sine wave of a vector
Try this: y = load('Data.txt'); x = linspace(0, numel(y), numel(y)); figure plot(x, y) grid It does not look a lot like...

environ 18 heures ago | 0

Answered
please tell the solution
If ‘T’ is a scalar, note that ‘Cp’ is also a scalar, so by definition it is a (1x1) array. Referring to it with any dimension g...

environ 19 heures ago | 0

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Answered
How can I get the central frequency out of a fft?
Not possible to run your code. One option is to use islocalmax, specifically using 'FlatSelection','center'.

environ 21 heures ago | 0

Answered
How to prevent overlapping of graph lines?
Use a logarithmic y-axis: x = [20000, 40000, 60000, 80000, 100000]; y1 = [100232986, 397895944, 900510601, 1597421811, 249452...

environ 22 heures ago | 0

Answered
Estimate the unknown parameters of an equation with the help of matlab?
Parameter estimation is straightforward in MATLAB, even for relatively complicated problems. Write your objective function to...

1 jour ago | 0

Answered
Derivatives for trig functions
Start with the Symbolic Math Toolbox: syms x positive real y(x) = asec(3*x^2+1); then use the appropriate function to calcul...

1 jour ago | 0

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Answered
Problem with intersect function
The intersectt function does not allow tolerances, so floating-point approximation error is going to present problems. Try th...

1 jour ago | 0

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Answered
MATLAB GA reject individual after fitness function evaluation
‘Now, I would like to be able to reject an individual in case some of its parameters (computed in Hysys) don’t respect my indica...

2 jours ago | 0

Answered
zero crossings with interpolation
Mohamed Jamal — Since you requested my response, I am posting this Answer. One of the first Answers I posted on this topic (i...

2 jours ago | 0

Answered
Vector output prints one after another
If you have R2013b or later, put them in a table: OutTable = table(t.', omega.',theta.',alpha.',Etotal.', 'VariableNames',{f, ...

3 jours ago | 0

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Answered
Array Indices Must Be Positive Values
The problem is: v_y0 = @(y_0)((6*x_0(n*t_t)-s)-y_0)*n*s-2*n*x_0(4-3*c)*(1-c)/(4*s-3*n*t_t)*s+4*((1-c)^2); ...

3 jours ago | 0

Answered
Using vpasolve to store an array of solutions
Use solve instead of vpasolve, then use vpa on each of the results: s=solve([eqn1,eqn2,eqn3,eqn4],[theta4,theta5,la,lc]); sth...

3 jours ago | 0

Answered
how can i found the best linear function representing the following points ???
Try this: x=[ 0 0.6 1.2 1.8 2.4 2.8 ] fx=[ 1.1 2.5 4.9 6.4 9.3 14.1 ] B = [x(:) ones(size(x(:)))] \ fx(:); % ...

3 jours ago | 0

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Answered
Different number of elements error.
Initially, you assign ‘g’ to the gravitational acceleration constant: theta0 = pi/3; g = 9.81; L = 1; then here you assign ‘g...

3 jours ago | 0

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Answered
How to resolve empty inputdlg box issue?
Try this: a = inputdlg('Type a number:') if isempty(a{:}) disp('a is empty') % Info...

3 jours ago | 1

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Answered
How to get UTC time in my program?
Try this: dtLCL = datetime('now', 'TimeZone','local') % Current Local Time dtUTC = datetime(dtLCL, 'TimeZone'...

3 jours ago | 0

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Answered
Can I set the initial value of the solution in "solve" function? Like "fsolve" function?
The vpasolve function allows initial estimates and ranges, See: Find Multiple Solutions by Specifying Initial Guesses and relat...

3 jours ago | 0

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Answered
Adding multiple rows of a cell array
Try this: D = load('NumericalFourierForce.mat'); Numerical_FourierForce = D.Numerical_FourierForce; Out = cellfun(@(x){sum...

3 jours ago | 0

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Answered
To change the recording frequency of biomechanical data from 60 Hz to 100 Hz
I would advise against using interp1. Instead use the Signal Processing Toolbox resample fucntion, since it uses an anti-aliasi...

4 jours ago | 0

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Answered
how to sort each line in a text file by the first character in a line?
The data you posted is a bit difficult to work with, so I created my own version that should work with it. It assumes your data...

4 jours ago | 0

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Answered
stop band ripples vs stop band attenuation?
For all intents and purposes, they are the same thing. In filters with stopband ripples, that parameter sets the stopband atten...

4 jours ago | 0

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Answered
how can one set the default size of font for plot?
Experiment with: Default Property Values

5 jours ago | 0

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Answered
plot for a part of x
Experiment witth this example: dt = datetime([2001 01 01])+calmonths(0:(2021-2001)*12); % ‘datetime’ Vector y = ra...

5 jours ago | 0

Answered
I cannot get these error bars to work for the life of me
This unfortunately will not work with categorical variables, so it is necessary to define the x-coordinates as numeric, then lab...

5 jours ago | 0

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