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Solving a nonlinear system differential equation using symbols
When using ReturnConditions, the outputs need to include Parameters and Conditions, or use only a single output syms a b c d e ...

約4年前 | 0

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Transfer Function: Continuous approximation of discrete bode
Hello @John The second paragraph of the question states that P is a discrete-time transfer function. But later on the question ...

約4年前 | 0

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Most relevant variables to a Simulink model
The Simulink Design Optimization toolbox can do sensitivity analysis. I've never used it, so can't say anything more than that.

約4年前 | 0

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matlab function fft, Error using fft Invalid data type. First argument must be double, single, int8, uint8, int16, uint16, int32, uint32, or logical.
At this line metroX=abs(fft(x,N1)); the variable x is still a sym object. The input to fft() must be a sequence of actual num...

約4年前 | 0

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Step Response of Transfer Function is Different Than Response of State Space
Is linsys1 a discrete-time or continuous-time, i.e., what is the output of linsys.Ts If the result of that command is not zero...

約4年前 | 0

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generating random numbers from poisson distribution
Check out doc poissrnd assuming that lamda*t in the question is the same as lamda in that function.

約4年前 | 0

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Single extension not everywhere?
The linked blog post does not show assignment (=) included uder "Supported Operators and Functions." It still isn't: doc bsxfun...

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How could I do a summation of (y) so I can create a signal that goes from 0 to 30 sec repeating (y) every 3 seconds in a graph.
Maybe this is the goal? Note that I modified the definition of y to make it in line with what I assumed the question means. A ...

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Not enough input arguments with transfer function operations
Maybe tf is shadowed on your path. Does the output of the which command look like this: which tf -all

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FFT magnitude as a function of frequency resolution
Hi @Rob H, For a question like this, it would be immensely helpful to provide some example data/code that illustrates the issue...

約4年前 | 0

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am I correct in generating signals and fft?
We know that zero-padding in the time domain corresponds to interpolation in the frequency domain. This problem can illustrate ...

約4年前 | 1

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Transfer function to pole zero diagram
The answer to the first question is to use pzplot() H = tf([1 .5],[1 2.5 3.125],1) pzplot(H) axis equal Not sure about the s...

約4年前 | 1

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How can I do summation in transfer function?
One approach R_Foster = 1:3; C_Foster = 11:13; sys_Foster = tf(0) for ii = 1:3 sys_Foster = sys_Foster + tf(R_Foster(ii...

約4年前 | 0

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How to deal with the connection between symbolic caculations and numerical caculations?
Of course, the symbolic approach will work and might even have some benefits (IDK), but just want to make sure you're aware that...

約4年前 | 1

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Estimate first order transfer function from Phase at Frequency
@John Based on the problem statement can you write the symbolic form of a first order transfer function, H(s)? How many free pa...

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What Is Wrong With My Code? (Downsampling Of A Sinc Signal)
Hi @cikalekli, I'm not sure what you're trying to show, but I can see at least one issue in the code that needs to be considere...

約4年前 | 1

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Taking the sum of exponentials
Break it up with simple inputs to see what's going on: x = [1 2]; % row vector a = [1 2 3]; % row vector x./a(:) % implicit e...

約4年前 | 0

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How do I generate a random number between two numbers with using a distribution
Emre, The statement that the the random() command only generates integers doesn't sound correct. The doc page shows an an exam...

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Why do I get an error when I try to use the solve function?
solve() requires the inputs to be Symbolic Math objects syms x y [x,y] = solve(x + 2*y == 4, 2*x - y == 3) % note the use of ...

約4年前 | 0

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Simulink - Multiplication of Two Sine Signals (i couldn't understand the logic)
Question 1: How does the value of the signal dimension ( [5x1] ) was created? I mean which parameter for sine wave dis affect th...

約4年前 | 1

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For spectroscopic analysis is it better to use a fft, a spectrogram (short Fourier transform), or a discrete Fourier transform?
The FFT, implemented in Matlab by the fft() function, is just an algorithm for computing the Discrete Fourier Transform (DFT) of...

約4年前 | 0

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Replacing symbolic subexpression with unspecified arguments
Not 100% clear on the question. Maybe this? syms a1 a2 a3 a4 x1 x2 x3 x4 syms a x y(a,x) = sin(a * sin(x)) y(a2,x2)

約4年前 | 1

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Incorrect Frequency response from Transfer Function
The frequency input to freqs is in rad/sec. If you want to match the correct output, the code will at least need to be: whz = ...

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How to determine the transmittance of a closed system using symbolic calculations?
Correct that feedback(), tf() and Control System Toolbox functions in general don't work with sym or symfun objects. Within the ...

約4年前 | 0

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FFT gives wrong answer for a generating function
Define the function to evaluate f(theta) ffunc = @(theta) (theta.^4 + 1); % only valid between -pi and pi, zero otherwise Defi...

約4年前 | 0

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Transfer function error help
The denominator is missing a * multiplication. Maybe you meant: [L*C*(R1+R2)*(R1*R2*C + L) R1] Note the * between the two t...

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How to calculate the norm of the transfer function in frequency domain?
Check out doc tf to learn how to create a transfer function (tf) object. Once you have G(s) defined as a tf object use bode() ...

約4年前 | 1

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Spectra replica after sampling a continuous time signal
Here is an illustration using a different signal; maybe it will provide some insight into your specific problem. Define a conti...

約4年前 | 1

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How to find the area under part of the histogram
Replace sum() with cumsum() and then subtract to get the area between two bins of interest? doc cumsum

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What is wrong with my Code? (Fast Fourier Transform)
The problem can be solved symbolically or numerically. First symbolically. % define duration and frequency Td = 0.002; fc = ...

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