Answered
Even & Odd Discrete time Signals
Matlab doesn't support zero or negtaive indices, so it won't be possible to implement this operation using ordinary vector index...

1 year ago | 0

Answered
Digital filter with lowpass, then filtfilt: different output
lowpass calls filtfilt (or executes code equivalent to filtfilt) only if the underlying filter is IIR. If it's FIR, as in the qu...

1 year ago | 0

Answered
Assertion block does not stop simulation if I run the model with "sim" function
According to this doc page, pausing a simualtion while it's running is not supported when using the sim command. If in your act...

1 year ago | 0

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HELP! Error using plot Vectors must be the same length. Error in Doc (line 94) plot(t, y);
Hi Matheus, The explanation for the error is that the fftm function is doing a "one-sided" FFT, hence it returns an output with...

1 year ago | 0

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Answered
Scaling of Filter Coefficients in "fir1" function
For a FIR filter H(z) = b0 + b1*z^-1 + b2*z^-2 .... + b_n*z^(n-1) its frequency response is H(w) = b0 + b1(exp(-1j*w) + b2*e...

2 years ago | 0

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Answered
The real implementaion of the C2D function "Control Systems Toolbox"
Hi Youssef, There are two files named c2d.m which -all c2d I believe the code listed in the question is of the former. The la...

2 years ago | 0

Answered
How does one solve equations between symbolic functions for functions
Maybe isolate is the solution ... syms z(t) theta(t) r eqn = z(t)-r*sin (theta(t)) == 0 z(t) = rhs(isolate(eqn,z(t)))

2 years ago | 0

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Question

Why Does numel() Accept More than One Argument?
@doc:numel indicates that the function accepts only a single argument. But it can be called with more than one argument and it r...

2 years ago | 1 answer | 1

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answer

Answered
Force symbolic simplification to eliminate variable
Hi ludolfusexe, Try equationsToMatrix load ddddh_fun symvar(ddddh_fun) syms u % A*u = b [A,b] = equationsToMatrix(ddddh_fu...

2 years ago | 0

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Answered
Band-pass filter extraction.
Hi Claudio, Start with the original code Inertial_period = 20.215; K1_period = 24; % K1 period (hours) M2_period = 12; In...

2 years ago | 1

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How to make variables assigned to SimulationInput object accessible to a PostSimFunction when using parsim
Hi Afzal, I think that the simOut from the simulation being called with sim is the argument sent into the PostSimFcn. Does the ...

2 years ago | 0

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Answered
Data type symfun (code problem)
Hi Patryk, Works o.k. here. What version of Matlab are you using? syms x f(x) = x^(3/5) * (4 - x)^(1/3); df(x) = diff(f(x));...

2 years ago | 0

Answered
UAV Toolbox - Reference Frame Definition
In reference to the example on the linked page, I assume the waypoints are specified in the waypoint trajectory reference frame....

2 years ago | 0

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Answered
Fourier Series,Spectral Analysys
Define the function over one period T0 = 1; % period f0 = 1/T0; syms t s(t) = rectangularPulse(.2,0.8,t); figure fplot(s(t...

2 years ago | 1

Answered
Read excel data in Simulink and convert it into an array
Add the line coder.extrinsic('readmatrix'); at the top of the Matlab Function after the %#codegen directive. Or, read in the ...

2 years ago | 0

Question

Why Does dcm2angle Work Like This?
Suppose I have a direction cosine matrix, brought to my attention by a colleague C = round(angle2dcm(-pi/2,-pi/2,0,'ZYX')) Ext...

2 years ago | 0 answers | 0

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answers

Answered
simulink -sinx integral
Hi 승표, It's not really an offset. The Integrator block parmameter 'Initial Condition' is set to zero, which corresponds to sett...

2 years ago | 2

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How can I get the energy of a wave?
Hi Li-Wun, This answer may be what's needed. If not, feel free to post back here with follow-up questions, preferably with exam...

2 years ago | 0

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Obtaining a dataset from bandpass function
Hi Patrik, Is the output argument 'y' from bandpass the filtered time signal that is needed?

2 years ago | 0

Answered
Building symbolic expression with vars from vector
Hi ludolfusexe, It looks like the original code was attempting to use j as a index into an array, but symbolic variables are ne...

2 years ago | 1

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Answered
when i want to get magnitude of vector in command window told me that index exceeds matrix dimensions. although i write true code
Code works here v=[1 2 3 9 6] pp=v.^2 Rr=sum(pp) mag=sqrt(Rr) disp(mag) Check norm(v) Perhaps you have variable(s) named...

2 years ago | 0

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Cross-correlation in frequency domain and xcorr2 in MATLAB
Hi Shy, Assuming that the output of the xcorr2 is the expected result, it can be obtained with the changes below img1 = imread...

2 years ago | 0

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Answered
how to solve this problem?
Hi Federico, According to the nlssest, the variable names in the input and output time tables have to macth the InputName and O...

2 years ago | 1

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Answered
Difficulty in Calculating Signal Frequency with an Offset
Hi Raphael, The first point in the FFT is always the sum of the elements of the input. When the signal includes the offset, the...

2 years ago | 0

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Answered
I am getting different values of fft for the same variable as demonstrated by a simple example below...
I think you were expecting ES be equal to the first column of EF. If desired for fftshift to work along a specific dimension of...

2 years ago | 0

Answered
Non-Negative Solution with Integrator in Simulink
Hi Rajmohan, Do the parameters Limit Output along with Upper and Lower Saturation Limit do what's needed? Integrator

2 years ago | 1

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Answered
Getting different outputs from indexing and graphically.How do I verify this indexing value?..
L=10; n=1.45; Omega=1.020663297455751e+11; GAMMAb=3.590391604102621e+08; c=2.9979e8; dt=6e-12; %time increment T=1...

2 years ago | 0

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Answered
I can't place the fft curve at the signal frequency exactly. There's been a slight deviation of the fft peak at that frequency
The code has fs = 80*fmax; but the TA vector is space by dt, so fs should be fs = 1/dt;

2 years ago | 0

Answered
Are polyshape vertices preserved reliably without floating point errors?
Hi Matt, The doc pages for intersect, union, subtract, and xor all show a second output (ShapeID) that indicates if a vertex i...

2 years ago | 1

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Answered
I can't place the fft curve at the signal frequency exactly. There's been a slight deviation of the fft peak at that frequency
fmax=1e9; %maximun frequency of the signal fs=60*fmax; ts=1/fs; %time increment T=10e-9; ...

2 years ago | 0

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