Question

Does Error Message Depend on Whether or Not Function is Executed Inside Try/Catch?
This call to diff resolves to symbolic diff syms s diff(@(s) 1/(s+1),s) which diff(@(s) 1/(s+1),s) I guess the parser sees t...

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Signal processing question (phase response of a digital filter)
Hi Paul, Can you provide a simple concrete, example that illustrates your concern? I suspect that you're seeing the difference...

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Why doesn't the noise density of the Allan deviation plot match the noise density of imuSensor?
Hi Tsz Hey Lam, The example in the link was for angle random walk (ARW), but the example in the question is using white noise. ...

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Using the command hinfsyn(), returns the error "Error using DynamicSystem/hinfsyn Plant P must have an explicit state-space realization".
Hi BIJIT, Running the code .... L=500e-6; C=40e-6; R=0.01; Ts=50e-6; w_lc = 1/(sqrt(L*C)); w_sys = 2*pi*60; s = tf('s');...

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Plotting a spectrogram with y axis values as whole numbers and time set to seconds
Hi Felix, Return the output arguments of spectrogram and then you can make any plot you want with any units in any of the dimen...

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2D FFT interpolation - Keeping the amplitude
Hi canadarunner, The plot on the left is amplitude and the plot on the right is in dB. Changing the left plot to dB brings the ...

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Issues with SImulink Output to a Vector.
It sounds like you've solved the immediate problem. Based on what's been stated, the "vectorized" approach is taking advantage ...

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Fourier transform of dynamic mode coefficients for impinging jet along a line from nozzle exit to plate at a distance 0.6 times jet diameter
Hi DEBI, It will be easier for people to help if yor provide all of the information needed to run your code. You should save th...

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How to expand symbolic exponential numerator to reduce fraction
syms Y_t A_t K_t alpha L_t k_t w_t y_t Y_t = A_t*K_t^alpha*L_t^(1-alpha) lil_y = y_t == Y_t/L_t labor_eqn = L_t == solve(li...

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Bessel filter analog to digital
Hi Maurizio, freqs returns the frequency vector, wb, in units of rad/sec. freqz, as used below, returns the frequency vector, ...

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Conditionally executed functions in Simulink
A Triggered Subsystem may fit the bill. More generally, check Conditionally Executed Subsystems for more discussion.

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how to preferentially compute vector products rather than matrix products
"Is there any way to change this setting without bracket?" No. From the doc page for Operator Precedence: "Within each preceden...

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inverse Laplace transform in simulink
The Matlab Function block does not support any symbolic operations, as far as I know. I think the best you can do is structure t...

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Functions specgram and spectrogram - what does the spectogram' 3rd dimension mean and what unit it has?
Hi Peter, Until I read this question, I had never really thought about the outputs of spectrogram in an absolute sense. I only ...

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One of the systems I want to control includes disturbances in the input matrix. How can I convert this state space equation into a transfer function?
Combine u and d into a single input vector. Then the "B" matrix is composed of the Bbar and Ebar matrices concatenated together ...

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Hello: i want to give a step input to my simulink function which starts at 1 second and ends at 1.1 seconds and having an amplitude of 0.1. Step block not working
Try using the Waveform Generator block with Waveform Definition parameter set to pulse with appropriate parameters. However, the...

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why lsim return empty states?
According to the lsim doc page, the output x is returned when the input sys is a state-space model. The doc page further distin...

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create a new array with group sum
Check out splitapply

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Incorrect number or types of inputs or outputs for function 'step'
Hi Archit, It would be much easier to help if you copy/paste the actual code into the Question rather than a large screen captu...

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ss2tf taking too long
Which version of ss2tf are you using? The one that ships with Matlab which -all ss2tf doesn't support sym inputs syms a b c d...

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logging data from Simulink to workspace
Hi Asmaa, Because the signals are already in the simulation, why would there be a need to send them from Simulink to Matlab onl...

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Assistance with Transfer Function Output
The second input to lsim, called 'input' in the code, has to be a vector (becuase Hd is single input) of numerical values. So yo...

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How to extract coefficients of custom variables in symbolic expression in MATLAB?
syms psi phi theta i_B j_B k_B psi_dot phi_dot theta_dot omega_B = (phi_dot - psi_dot*sin(theta))*i_B + (theta_dot*cos(phi) + p...

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Discrepancy in PI Controller Outputs for voltage control and current control for droop control strategy in MATLAB
With regard to this part of the code: % //PI controller for Vd error_vd(n)=((sqrt(2))*Vd_ref(n))-(V1d(n-1)); ...

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We have table，Why we use timetable？
It looks like timetables offer additional functionality helpful for dealing with time histories of data: Timetables

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creating cell array using find command
Hi Amit, Just need to prepend the index vector to keep the first column. rng(100) analysisdataacd3 = num2cell(randi(3000, 10,...

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Receiving an error when using interp2 to interpolate longitude and latitude (Error using griddedInterpolant Grid arrays must have NDGRID structure.).
lon = xlsread('lon.xlsx') ; lat = xlsread('lat.xlsx') ; elevation = xlsread('elevation.xlsx') ; interp2 requires matrix input...

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PID Controller in Simulink question
Set the 'Source' parameter to 'external' as in doc for PID block. The you can calculate the gains external to the block as funct...

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Problem in filtering my desired frequency
Hi Abdullah, A couple of issues to address in the anlaysis. I think you started by trying to define an ideal filter in the fre...

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Problems in dynamic symsum variables in solving a system of equation
Hi Tsz Tsun, Why not just use regular sum instead of symsum when the goal is to just take the sum of a finite number of terms? ...

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