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**Feeds**

Second argument must be a scalar or vector of unique symbolic variables.

No error if running here w/2024b, nor did I get an error running on my local machine with 2024a syms X; syms gamma; syms Y; ...

3 days ago | 0

FFT result dependent on number of interpolation points

Hi Ali, The doc page for interpft states: "interpft(x,n) interpolates the Fourier transform of the function values in X to pro...

3 days ago | 0

How to get the datatype from the signal line to excel after compiling the model?

Hi jenny, Signal names on the outputs of a block can be found via: names = get_param(block,'OutputSignalNames'); The port (in...

6 days ago | 0

Finding the sample time of a Simulink signal/line programmatically with Simulink.Block.getSampleTimes

Hi Andrew, If the block has multiple outputs, like in your case, check out ts.ComponentSampleTimes which should be an array o...

6 days ago | 0

Not getting desired signal when I multiply sine wave and pulse generator in Simulink

Hi Deepankar, If the question shows the full model, then we can see it has no continuous states. The solver will be VariableSte...

9 days ago | 0

Plotting DTFT in Matlab

L = 1000; fg = 1000; fs = 100000; T = 1/fs; tmin = 0; K = 1; n = tmin:L; t = n*T; %Base function calculation x = xdp1(K...

9 days ago | 0

Accessing struct variable data inside MATLAB function block in Simulink

Hi Jacob, The typical way to define a parameter in a Matlab Function block is described at Use Data in Multiple MATLAB Function...

13 days ago | 0

| accepted

Unable to get sym(pi) to output Pi in matlab

Check your sympref sympref Make sure that FloatingPointOutput is set to False.

14 days ago | 2

Symbolic Piecewise Addition Issue

Seems to work here. How does the singz function work insofar as the output argument, func, is not defined inside the function. ...

19 days ago | 0

Given the spectrum of a signal x(t) , What is the minimum sample rate that would allow for x[n] to be recoverable?

Hi Zhen, Your question isn't really about Matlab. You might get more traction on a signal processing forum, like dsp.stackexcha...

27 days ago | 0

Explore DFT Resolution, need help with answer interpretation

Hi Zhen, The first code gives the expected result, you just need to zoom in to see it. If we look at how freq_axis is defined,...

29 days ago | 0

| accepted

Explore DFT frequency accuracy, got stuck

Hi Zhen, Consider the following, which is one case from the overall analysis. %Part 1 % MATLAB code to analyze the frequency ...

29 days ago | 0

| accepted

How do I name a variable in Simulink so that I can later use it to compute a value, such as sin(psi) or cos(phi) or tan(theta).

Hi DJ, I did not open your model so I'm not sure exactly what you're trying to do. Having said that, Simulink doesn't really c...

29 days ago | 0

Why is my hamming window and rectangular window values the same for sigma_omega when I make L = 21?

Another approach is to integrate the DTFT directly. The DTFT can be evaluted with freqz % Set window length L = 21 L = 21; % ...

1 month ago | 0

generating periodic trapezoidal waves with ramps

Approach using pulstran trap = @(t) interp1([0 1 2 3 4 5],[0 0 1 1 0 0],t,[],0); t = 0:.01:25; d = 0:5:25; plot(t,pulstran(t...

1 month ago | 0

Can I save the outputs of completed sims when running parsim instead of saving them all at the end?

Hi Kadhir, Based on the description in the question, I'm not quite sure what's happening. How exactly are you monitoring the me...

1 month ago | 0

| accepted

Plot Fourier Transform (FFT) Interpolation Model into future

I've only very briefly skimmed this code and the other thread. My guess is that you're seeing the effect of zero-padding the FFT...

1 month ago | 0

Adding plots to an existing root locus plot

Maybe sgrid is what you're looking for.

1 month ago | 0

Calculation not having the desired array size

Was % xn(1:3,:) = qF(:,:,i) .* Acc(i,:)' - g; should be xn(1:3,:) = (qF(:,:,i) * Acc(i,:).' - g.').';

1 month ago | 0

| accepted

How to properly make a circular histogram?

Hi Neuroesc, "However, the resulting histogram is not really ideal - the bins are not homogeneous because they get larger as th...

1 month ago | 1

Trying to use for loop to create an array of bandpass filters, but gets error "conversion to double from dfilt.df2sos is not possible"

Hi Hanlin Wang, fs = 48000; % sample frequency wss1 = [5680 2840 1420 710 355 177 88 44]*2*pi/fs; wss2 = [11360 5680 2840 142...

1 month ago | 0

Compare char data in a cell {'x'} to a character 'x'

Create the sample .txt file filetext = ["HEADER that is ignored";"R 0 5";"L 5 0"]; writelines(filetext,"test.txt"); type test...

1 month ago | 0

Question

Why Doesn't "clear all" Clear the Assumptions from the Symbolic Engine?

According to the doc page assumptions To clear all objects in the MATLAB workspace and close the Symbolic Math Toolbox™ engine ...

1 month ago | 0 answers | 0

### 0

answersFinding Z-Transform of a piecewise function.

Based on the context of the question, it is quite likely that the problem is to solve for the bilateral z-transform of f(n). Ho...

2 months ago | 0

Generate random integers that sums to a specific number within a specific range

How about a simple loop that finds all combinations of the random variables that satisfy the constraint and then sample from tha...

2 months ago | 0

Question

What is the Interpretation of the p-Value from runstest() ?

For the function runstest the null hypothesis is "that the values in the data vector x come in random order." Running 100 run t...

2 months ago | 1 answer | 0

### 1

answerWhat units does Matlab's function angvel produce?

angvel is fundamentally flawed. Here's the example (truncated) from the doc eulerAngles = [(0:10:40).',zeros(numel(0:10:40),2)...

2 months ago | 1

I am trying to implement a state space solution in Simulink with 1 variable m in matrix C, but the runtime error says Variable ‘m’ does not exist.

The Goto block is used for signal flow, not assignment to a variable. The Constant1 and Goto blocks can be deleted. The easiest...

2 months ago | 0

vpasolve giving incorrect answers for a system of trigonometric equations. How do I set bounds to the solution?

Hi Nat, I didn't try to analyze the equations to be solved, but they appear to be very sensitive to the actual values of Sa1, S...

2 months ago | 0

| accepted

Question

Should table Indexing be Faster?

Example code. t = combinations(0:10,0:10,0:10,0:10); tic for ii = 1:10 for jj = 1:height(t) u = t{jj,:}; ...

2 months ago | 1 answer | 3