質問

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...

1年以上前 | 1 件の回答 | 0

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質問

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)

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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);...

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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...

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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 <= ...

1年以上前 | 1

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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...

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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...

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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...

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what is this block called
That is a Memory block.

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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 ...

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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; ...

2年弱前 | 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...

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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...

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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...

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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.

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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 ...

2年弱前 | 1

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

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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...

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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...

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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...

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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...

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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...

2年弱前 | 1

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

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

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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...

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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...

2年弱前 | 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...

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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; ...

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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...

2年弱前 | 2

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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...

2年弱前 | 1