# Paul

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**Content Feed**

DSP Format Discrete Transfer Function Matlab

You can use freqz() if you want, Because filt() returns a tf object from the Control System Toolbox, bode() or bodeplot() functi...

ungefär 9 timmar ago | 0

Find Bode Phase of Uncertainty models

I don't know if there is much control over what bode() does with a uss input, but you can get at the data in the plot after the ...

en dag ago | 0

Using rlocus() in MATLAB

Hello @Tb, The basic idea of the root locus is that is shows the location of the closed loop poles as a function of a gain, let...

en dag ago | 0

How to get Fourier transform of rectangular window as shown by wvtool function?. Why frequency domain of rectwin(M) using fft and wvtool are different?

It looks like wvtool is plotting the DTFT of rectwin(M) [h,w] = freqz(rectwin(64),1); figure plot(w,db(abs(h))) The DFT (as ...

3 dagar ago | 0

lsim and transfer fcn block in simulink output different results

Simulink uses a continuous-time differential equation solver. The specific solver and solver parameters, like step size informa...

4 dagar ago | 0

| accepted

High-precision IFFT

Given that x is an array of high precision numbers, not symbolic expressions, it should be straightforward to implement the ifft...

4 dagar ago | 1

How to plot Gauss sums ?

There are at least two problems with the code. Assuming you want to compute numerical values of s, the code can't reference s i...

5 dagar ago | 0

| accepted

why margin() give positive phase & gain margin for unstable plant

I don't think margin() first verifies that the closed loop system is stable. It just applies the gain and phase criteria to the...

5 dagar ago | 0

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Matlab recommends me to apply 'subs' command but I have already used it to convert a symbolic matrix into a numerical one. What fails?

It looks like there is still one or sym objects left in A_num after the command A_num = subs(A_simb, P_simb, P_num); What is t...

6 dagar ago | 0

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Implementation of filter bank using fir1

Take advantage of the frequency shift property of the DTFT. For example Fs = 1000; f = (-0.5:.001:0.5)*Fs; L = 50; lpf = fi...

7 dagar ago | 1

| accepted

dbode results in phase shift that is wrong (I believe)

dbode() callse bode(), which in turn has an algorithm that tries to "unwrap" the phase by adding multiples of 360 deg across the...

8 dagar ago | 0

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How do I print a Simulink block's mask dialog?

Here is a way to get the mask parameters for a masked block, stored in a struct with field names the parameter names and field v...

8 dagar ago | 0

Is applying a binary operator (+,-,*,/) to char arrays supported by MATLAB or just a "trick"

Not directly on point to the Question, but a related "feature" is that char vectors can be used to directly into index into arra...

9 dagar ago | 0

Finding x for y = f(x) in simulink

According to the Symbolic Math Toolbox, the solution can be expressed as %iel = wrightOmega(uel/3 - log(3) - 2/3) - 1/3 assumi...

10 dagar ago | 0

Unique workspace for each instance of Interpreted MATLAB Function block?

I think the way that you can do this with minimal changes to your overall approach would be as follows. If you're willing to cha...

10 dagar ago | 0

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How do I implement this in discrete form

If the transfer fucntion of the controller, C(z), is improper (more zeros than poles), then its partial fraction expansion will ...

11 dagar ago | 0

Array variable as parameter value in simulink

Use a Selector block. Choose the 'Index option' as 'Index vector - port'. Then connect A to the U port and feed the Indx1 port ...

13 dagar ago | 1

| accepted

Create diagonal matrix from vector in Simulink without DSP toolbox and without knowing the dimension of the vector

The easiest way, perhaps not without drawbacks, is to use an Interpreted Matlab Function block. In the dialog box make the 'Matl...

13 dagar ago | 0

Trying to demonstrate group delay but not seeing any in dsp.BiquadFilter.

I thought group delay shifts the low frequency envelope of the signal and phase delay (phase / frequency) shifts the high freque...

16 dagar ago | 0

| accepted

check for new line in a string

These functions might help doc newline doc contains

16 dagar ago | 0

I need help plotting this inverse Laplace Transform

Replace all instances of pi with Pi, defined as Pi = sym(pi); which is a good habit to get into regardless. Then you can stay...

16 dagar ago | 0

| accepted

If z is a vector , what is the difference between angle(z) and atan2(z)

atan2() returns the answer in radians. So multiply it by 180/pi as for P2 and P3 (or use atan2d(), though atan2d() might result ...

17 dagar ago | 0

How to integrate for each row of parameters in a matrix, rather than using a loop

integral() can integrate a vector function of a scalar. It sounds like this is what you're looking for. link to doc Whether or...

17 dagar ago | 0

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Problem with amplitude and smoothness of FFT

The time domain signal, Signal, is not a sum of pure cosines because of how Digit is calculated, so we shouldn't expect its fft ...

17 dagar ago | 1

| accepted

how can i use mvnrnd function?

I'm not exactly sure what the question is. If the question is: how to draw hundres of samples from the multi-variate normal dis...

17 dagar ago | 0

problem in summation of two transfer function

sys1 = tf(1,[2 1]); sys2 = tf(2,[2 1]); sys3 = sys2 + sys1 minreal(sys3) minreal(parallel(sys1,sys2)) minreal() normalizes ...

18 dagar ago | 0

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Error in using eval statement

There's almost certainly a better way to organize the data and store the results, but if you must use eval: ['Energy_H_A',num2s...

19 dagar ago | 0

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How can I fix this Error?

Let's look at what we have so far with a sight change in notation that might make it clearer to read and a path to a general sol...

21 dagar ago | 0

Find poles and zeros of transfer function

That error shows up because minreal() and ss(), etc. are functions in the Control System Toolbox. Those functions cannot accept...

22 dagar ago | 0

| accepted

Define and Use Structure Parameters in Simulink

Do you actually have a variable in the base (or model, I suppose) workspace named 'struct'? That would be odd because struct is...

22 dagar ago | 0

| accepted