Question

How Can a sym Vector have Elements that are Vectors Themselves?
I ran the following code on 2024a syms x c1 c2 real m1c(x) = c2 + c1*x + heaviside(x - 4)*(3*x - 2)*(x - 4); This line causes...

10 months ago | 1 answer | 0

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answer

Question

Simplify() Does Not Work with "All" Argument?
This is a bug? syms x c1 c2 real m1c(x) = heaviside(x-4)*(3*x-2)*(x-4) + c1*x + c2; simplify(diff(m1c(x),x),'All',true)

10 months ago | 0 answers | 0

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Answered
Matrix multiplication between an operation matrix, such as the rotation matrix, and a coordinate list.
y_rotation_matrix=@(theta) [cos(-theta) 0 sin(-theta);0 1 0;-sin(-theta) 0 cos(-theta)]; rng(100) coordinate_list=rand(10,3);...

10 months ago | 0

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Answered
Errors in the symbolic integration of the Dirac Delta function (bug?)
Hi Geoffrey, Not sure why there seems to be a problem with the antiderivative v1. You should consider reporting it as bug. I've...

10 months ago | 0

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Answered
Is it possible to 'interpolate' in FFT data?
Hi xd. Here is one way to think about this problem. Let c[n] = A*cos(w_0*n + phi) be the reference signal where -pi <= w_0 <= ...

10 months ago | 1

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Answered
Run an enabled and triggered subsystem only one time (single shot)
Does it really need be enabeld and triggered? Even if so, it should only run when triggered (and enabled), so if the trigger tr...

10 months ago | 0

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Answered
Designing an Output Zeroing Input for an LTI Discrete-Time System in MATLAB
Hi shokouhfeh, I did not go through all of the math. But I do see that the input is of the form u[k] = (-1.1)^k That magnitud...

10 months ago | 0

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vpa, simplify, solve, etc don't fully simplify symbolic function.
l = 50; a = 10; W = 1200; syms Q(z); Q(z) = 1200 + 56*z - 2.5*z^2; R = - int(Q(z), [0 l]) + W; syms F1(z) F2(z) F3(z); F1...

10 months ago | 0

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what is this block called
That is a Memory block.

10 months ago | 1

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Answered
Transfer function model from block diagram
The easiest way, IMO, is to use connect. Feel free to post back here if you still have questions after reading the doc page and ...

10 months ago | 0

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Answered
Help with MATLAB symbolic toolbox
Hi Scott, See below for solution % Set up symbolic variables syms t C1 C2 % Set up parameters K = 2.2167e+06; M = 45.96; ...

10 months ago | 0

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fftshift implementation in Simulink
fftshift is extended to code generation. Assuming the data output from the FFT block is in linear order, you can call fftshift f...

11 months ago | 0

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ECEF 6DOF block - position calculation
Hi Thomas, As far as I can tell, the translational equations in the Algorithms section of the documentation page 6DOF ECEF (Qua...

11 months ago | 0

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Data extraction/split from table
Hi Daher, Start with findgroups identify the unique rows in the table and map each row to a unique row. T = readtable('art_fil...

11 months ago | 2

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Does enu2ecefv make any assumptions about the ellipsoid?
Hi Eitan, See Vectors in 3-D Coordinate Systems for a brief explanation.

11 months ago | 0

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Answered
How to calculate only several frequency with FFT ?
If the desired frequenices are a subset of those that correspond to the DFT as computed by fft, I'd imagine in many cases there ...

11 months ago | 1

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how to search parameter with specific name under the simulink system
Check out Simulink.findVars

11 months ago | 0

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Answered
possibility to create "Enbaled" subsystem
One option would be to create the subsystem as an Enabled subsystem and then control the enable port with a signal that you cont...

11 months ago | 0

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steady plot end with different rate of rise question
Hi fima, The functions being plotted are of the form syms y_i(x) r_i disp(y_i(x) == exp(r_i*x) - 1) Why should y_i(x) be the...

11 months ago | 0

Answered
Serious Problem with FiltFilt Function
The filter is not unstable. Rather, the issue is an interaction between how filtfilt works and the implementation of the biquadr...

11 months ago | 0

Answered
Could not define a data in matrix form in model workspace ( for simulation)
Based on the limited description, I'm not quite sure how you'd like to run multiple iterations of a simulation for different par...

11 months ago | 0

Answered
How to plot a string signal/array?
I don't believe there is a built-in function to plot a string vector against a numeric vector in any fashion, much less to produ...

11 months ago | 1

Answered
readtable does not import headers properly while reading csv file
dbtype data.csv T = readtable('data.csv','LeadingDelimitersRule','keep','ReadVariableNames',true); T(1:5,:)

11 months ago | 0

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no data in the data browser when i use model linearizer in simulink
See this Question and Answer.

11 months ago | 0

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unable to identify and simulate a function block
Try using a Constant block and set the block parameter "Constant value" to 2*Kr*lfc. Can do the same for the Kr*lfc term as well...

11 months ago | 0

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Answered
How to change the default x-axis unit in a Bode diagram to Hertz?
ctrlpref allows one to change the default units for frequency axis when plotting with bode and bodeplot (among other defaults in...

11 months ago | 2

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Deconvolution of two Bragg Curves
D = dir; D(3).name T1 = readtable(D(3).name); T1.Properties.VariableNames VarName2 = T1.Var2; D(4).name T2 = readtable(D(4...

11 months ago | 0

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Answered
Which exponential option block: fcn vs math function, is more accurate in a Simulink model?
In general u/fc (top path), is not exactly the same as u*(1/fc) (bottom path) in floating point. Example: rng(100) u = rand; ...

11 months ago | 0

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Answered
Why does this special case for associativity of a matrix product with a hadamard product hold true?
Hi Clay, If you're willing to accept (or show, which I think would be straight forward) that, in Matlab, matrix .* row is equal...

11 months ago | 2

Answered
Implementing Z-Transform of -a^n*heaviside(-n-1)
syms a n z Assume is an integer for clarity assume(n,'integer'); To get the expected result, we have to ensure the correct va...

11 months ago | 1