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Paul


Last seen: Today Active since 2011

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Answered
How to return function arguments as a struct?
Change the signature of the function to function out = designSpec(varargin) At the bottom of the function assign to the struct...

2 days ago | 0

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Answered
When simulating the response to a specific input signal, the input data U must be a matrix with as many rows as samples in the time vector T
Hi Federico, If sysansq_equi.B has five columns then INPUT_equi must also have five columns. Also, the number of rows of INPUT_...

3 days ago | 0

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Answered
How to concatenate elements in cell array to a vector?
Q= [23 34; 44 55; 56 71; 63 49; 71 30]; B= [12 13; 10 99]; C{1}=Q; C{2}=B; Output = reshape(vertcat(C{:}).',1,[])

6 days ago | 1

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Answered
FFT convolution and iFFT process
Hi Yassine, What does this mean: "df (can be variable),"? df should be a constant for all of FT. Is that not the case? Let's...

6 days ago | 0

Answered
Accelerance FRF with modal FRF?
The two blue curves look pretty close, perhaps just off by a scale factor (except for the dip at ~600 Hz?). Those curves are the...

6 days ago | 1

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Answered
How to plot imported data into matlab equations
One way that uses symbolic (which isn't really necessaray) syms omega mu epsilon sigma h k1 = omega .* sqrt((mu .* epsilon)/(2...

7 days ago | 0

Answered
The numerator returned from ord2 function is not directly compatible with tf2zpk function.
Hi James, I'm not sure this really is a problem; all functions are working as documented. A shorter way to get the z,p,k of the...

8 days ago | 0

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Answered
Symbolic solve with user-specified precision
Hi @Kylekk Perhaps I don't fully understand the Question, but I don't think there's a way to force the Symbolic Toolbox to find...

12 days ago | 0

Answered
Determining highest power frequency in noise signal
Hi Walter, The original code in the question subtracted the mean of the entire signal (T), not the mean of just the portion to ...

13 days ago | 0

Answered
Multivariable Zeros using Generalised Eigenvalue Problem
Is tzero what you're looking for?

13 days ago | 0

Answered
How do i delete the spaces that are in the middle of a string array?
replace seems to do the trick Single char: str=' 123 456 '; replace(str,whitespacePattern,'') Cell array of chars rep...

13 days ago | 0

Answered
diffrent plots if I add the command assume (0<=t) why ?
I suggest getting in the habit of using heaviside for problems like this syms t f_t3 = cos(12*t)*exp(-0.4*t)*heaviside(t); f_...

16 days ago | 1

Answered
44.1 kHz Sample Rate
The main question is: why is there a magnitude peak, even after the signal has been filtered? If the input to a stable, linear ...

17 days ago | 1

Answered
Introduce step signal after system response
Hi mikel, No need to use ode45 for this particular problem. The delayed step response with initial conditions can be obtained a...

20 days ago | 1

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Answered
What is the use case for ifft's trailing zero padding? Why is that the default?
Hi Kevin, I think the title question is misleading. The result of zero padding ifft is not incorrect. It does exactly what it c...

20 days ago | 1

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Answered
How to find empirical and estimated (Weibull) probability density
fitdist might do the trick for fitting the distribution

21 days ago | 0

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Answered
unexpected object of type 'RootOf'
I'm going to speculate that the denominator of Zges*rect in Aufheiz6Var is of too high of an order for the Symbolic Math Toolbox...

21 days ago | 1

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Answered
Changing delay length to solve algebraic loops
Refering to the block diagram at the top of the question .... Would it be correct to replace the IC block with a Constant block...

21 days ago | 0

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Answered
Calculate Impedance of circuit using laplace transform.
Assuming that the input voltage has a Laplace transform, you can multiply Zges with the Laplace transform of the input and take ...

22 days ago | 1

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Answered
I am trying to plot this piecewise function using for loop and if statements, yet I keep receiving error message: Array indices must be positive integers or logical values.
Hi Errol, The error message shows up because the code uses g as a subscript into C, and g takes on non-integer values. But g is...

22 days ago | 0

Answered
Using mscohere() on two Signals with different sampling frequencies each
resample might be useful to bring the sampling rates together. Lots of options involved, so probably want to experiment to make ...

22 days ago | 0

Answered
Replacing elements in a vector
array1 = [1 2; 4 2; 5 5; 4 2]; vector1 = [2 1 1 4 3 4]; result = [2 1; 4 1; 3 3; 4 1] result1 = vector1(array1)

22 days ago | 0

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Answered
Creating a string with Permutation
Hi hazmah, Is this what you're looking for? Axes_name = string({'sint0.2';'sint0.5';'sint0.7'}) fold_2 = string({'BCA';'BPCA'...

24 days ago | 0

Answered
Visualising symbols inside the tranfer fcn block in Simulink
Make the Transfer Fcn block a little bit bigger by selecting it and stretching it with the mouse.

25 days ago | 0

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Answered
get specific magnitude response value given a specific frequency from a freqz graph
freqz accepts a third argument that allows the user to specify the desired angular frequencies to evaluate (it must have at leas...

25 days ago | 0

Answered
Why I get two different covariance matrix?
Hi Ali, Perhaps Prof. Ng has some additional assumptions about the data that aren't included in your question. To compute the c...

25 days ago | 1

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Answered
Viewing .slx model figue without Simulink
Can you use Simulink Online ?

25 days ago | 0

Answered
Is it possible to solve multiple linear systems of equations in parallel with one matrix operation?
Hi Bill, pagemldivide introduced in 2022a can do the trick. Whether or not this is really better than the loop .... Aa = [ 0.8...

25 days ago | 0

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Answered
I should convolve my signal with which function to have the signal itself?
Hi Donya, dirac is only defined in the Symbolic Math Toolbox and so should only be used for symbolic math, and only for continu...

28 days ago | 0

Answered
Error when taking the continuous time Fourier transform
Using some examle data ... A = 1:5; std_A = 11:15; syms t w real f(t) = sum(exp(-t./A))*heaviside(t) std_ft(t) = sqrt(sum((...

28 days ago | 0

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