Answered
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; ...

1 year ago | 0

Answered
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...

1 year ago | 0

Answered
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...

1 year ago | 0

Answered
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...

1 year ago | 0

Answered
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...

1 year ago | 0

Answered
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...

1 year ago | 0

Answered
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...

1 year ago | 0

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Answered
Unable to get sym(pi) to output Pi in matlab
Check your sympref sympref Make sure that FloatingPointOutput is set to False.

1 year ago | 2

Answered
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. ...

1 year ago | 0

Answered
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...

1 year ago | 0

Answered
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,...

1 year ago | 0

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Answered
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 ...

1 year ago | 0

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Answered
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...

1 year ago | 0

Answered
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 year ago | 0

Answered
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 year ago | 0

Answered
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 year ago | 0

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Answered
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 year ago | 0

Answered
Adding plots to an existing root locus plot
Maybe sgrid is what you're looking for.

1 year ago | 0

Answered
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 year ago | 0

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Answered
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 year ago | 1

Answered
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 year ago | 0

Answered
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...

2 years 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 ...

2 years ago | 1 answer | 0

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Answered
Finding 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 years ago | 0

Answered
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 years 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 years ago | 1 answer | 0

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answer

Answered
What 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 years ago | 2

Answered
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 years ago | 0

Answered
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 years ago | 0

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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 years ago | 1 answer | 3

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