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Operator '>' is not supported for operands of type 'tf'
Hi Salah Gvd is a transfer function. It looks like you want to evaluate Gvd at a set of frequencies and then operate on that re...

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I need to resample the ECG signal at a lower frequency in order to apply some QRS detection algorithms
The following functions may be of interest: downsample , decimate , resample

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SAMPLE TIME , SIMULATION TIME , STEPSIZE IN DETAIL
Assuming this Question is in regards to Simulink: SIMULATION TIME: Refers to the master clock of the Simulink simulation. SAMP...

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Add delay to signal
Maybe this will help: Let's assume we have a simple FIR filter that takes the average of the current and two previous samples o...

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Why wont the state-space block accept a mux input?
The B, C, and D matrices of the state space block indicate the state space model is expecting a single input to generate a singl...

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Getting wrong frequency from fft compared to curve fit
Hi @lior fridman Assuming you're only interested in the magnitude of the DFT, it looks like everything is correct except for no...

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Why am I receiving this error?
Assuming you want a numerical evaluation, check out these doc pages: log , exp

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Implementation of varying-order integrator block in Simulink
Thanks for the link to the Varying Transfer Function block. I'm still not 100% sure what your're looking for. But maybe someth...

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about setting setBlockParameter (blkParam, paramVal)
A1. Gain and Position are block parameters. Position is a paramter that is common to all blocks. More info here Common Block Pro...

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Can I believe the values of these large integers?
What happens if you change this line to work in symbolic world? It will be slow .... (couldn't run here, exceeded the 55 second ...

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How can I triple integral the matrix k between -h/2 to h/2, -b/2 to b/2, -a/2 to a/2 wrt. z,y,x respectively?
Hi Ahmed Try int clc clear all E=70*10^6; v=0.3; p=50*10^3; h=0.01; a=0.5; b=0.5; syms x y z B=-h*[6*x*(b-2*y)/(a^(3)...

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Is there a way to change the value of the transfer function through MATLAB & Simulink?
Hi 영탁 한, My interpretation of your question is that you really have a second order, time varying system. Such a system can't be...

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Unable to perform assignment because the indices on the left side are not compatible with the size of the right side.
At line 45 the variable Ybuskron is a 2 x 2 matrix and E(i) is a 1 x 1 scalar. So their product is a 2 x 2 matrix, which is tryi...

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Digital Signal Processing Filters
Hi Mustafa, Not checking all of the code in detail, but I did notice that the fft plots don't look correct. They should be: f ...

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Tuning a PID controller to desired Overshoot, settling time and rise time
The CST offers some tools to do this. Start from this doc page. Or from this doc page if you want to use Simulink. Here is an ...

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convolution of two syms signal
If you know the definition of the convolution integral, try to use int to compute it.

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How to plot the Eular Transformation?
The Control System Toolbox, for unknown reasons, doesn't support the forward or backward Euler transformations. I'm not aware of...

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unable to find median of a set of signals in simulink
Very surprised that base Simulink doesn't have a block to compute the median of signal. If you don't have access to the DSP Syst...

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How to define this variable on MATLAB
Hi @Yakoob We can use the Symbolic Math Toolbox as one option Set up the equations r0=0.05; k1=0.5; mu=0.5; rho=0.5; k2=0...

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How does freqresp work with systems with internal delays?
Hi Philippe, As best I can tell, the functional process is as follows. Referring to diagram under the "Description" of setDelay...

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solve equation with symbolic variables
Hi Milan With a mix of syms and anonymous functions and a call to fsolve using a symbolic equation, I wasn't sure if the desire...

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Why isn't low pass filter centered around zero?
Hi Paul, The fft length is odd, so the computation of xFreq needs to be as shown below. N=120; Ap = 0.01; Ast = 80; Rp = (1...

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How do you do a sine transform in Matlab?
It appears that the sine transform can be computed from the Fourier transform. Example with a simple function syms t w xi real...

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How to determine and adjust the x axis after taking the 1D FFT?
Hi L'O.G. Let Y be the output of fft (with or without zero padding) Let NFFT = numel(Y) Let Ts = dt = t(2) - t(1) and Fs = 1/...

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Different margins using Bode and allmargin
allmargin returns the gain margin in absolute units, not dB. Converting the allmargin result to dB yields: 20*log10(11.1664) m...

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lowpass butterworth magnitude response
Hi Võ The zp2sos command in the code returns a second output, g, which is a gain that has to be applied to the filter response....

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Last graph is plotted with no data points(figure 3) dont know why
Hi Gophela, See below for probable error in calculation of Signal_Attenuation and correction. clc; clear all; close all; % ...

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Too many input arguments: error in ODE45
Hi Shreshtha, The function handle input to ode45 needs to take two arguments: t and x. Also, the matrix multiply defined in fun...

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Symbolic Toolbox Solving for Zeros
Hi Ryan, fzero is not used in the Symbolic Math Toolbox. Instead, check into using solve or vpasolve for this problem.

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I want to loop over these non linear equations
Hi nour From only the perspective of getting the code to run ... It looks like the code will run if, at a minimum, we don't ke...

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