Risposto
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 ...

circa 3 anni fa | 0

| accettato

Risposto
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 ...

circa 3 anni fa | 0

| accettato

Risposto
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...

circa 3 anni fa | 0

Risposto
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...

circa 3 anni fa | 0

| accettato

Risposto
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, ...

circa 3 anni fa | 1

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

circa 3 anni fa | 0

Risposto
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...

circa 3 anni fa | 0

Risposto
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...

circa 3 anni fa | 0

Risposto
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 ...

circa 3 anni fa | 1

Risposto
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 ...

circa 3 anni fa | 1

| accettato

Risposto
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...

circa 3 anni fa | 0

| accettato

Risposto
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...

circa 3 anni fa | 0

| accettato

Risposto
create a new array with group sum
Check out splitapply

circa 3 anni fa | 0

Risposto
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...

circa 3 anni fa | 0

Risposto
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...

circa 3 anni fa | 0

| accettato

Risposto
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...

circa 3 anni fa | 0

Risposto
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...

circa 3 anni fa | 0

| accettato

Risposto
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...

circa 3 anni fa | 0

| accettato

Risposto
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)); ...

circa 3 anni fa | 0

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

circa 3 anni fa | 1

| accettato

Risposto
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,...

circa 3 anni fa | 0

Risposto
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...

circa 3 anni fa | 0

Risposto
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...

circa 3 anni fa | 1

| accettato

Risposto
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...

circa 3 anni fa | 0

| accettato

Risposto
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? ...

circa 3 anni fa | 2

| accettato

Risposto
Problem in plotting the convolution
Hi Abdullah, Although not stated explicitly in the Question, I'm going to assume that a) the objective is compute the convolut...

circa 3 anni fa | 0

Risposto
how to interpolate stepfunctionresponse
Hi Hassen, I don't undertstand how the matrix i fits into the problem, and I assume that one column of the Matrix is a time vec...

oltre 3 anni fa | 0

Domanda


Is there a way to Rewrite a Symbolic Expression in Terms of nthroot?
Suppose I have a symbolic expression syms x real g = x^(1/3) - 1 I'd like to evaluate g for negative values of x, either symb...

oltre 3 anni fa | 1 risposta | 0

1

risposta

Risposto
get x knowing f(x)
finverse works well in this case. syms f(x) y f(x) = exp(x); g(y) = subs(finverse(f),x,y) g(23)

oltre 3 anni fa | 0

Risposto
acker(): "Error using sym/poly". Why?
Hi John, A = [0 1; -4e5 -400]; B = [0; 4e5]; C = [1 0]; Aaug = [A, zeros(2,1); -C, 0]; Baug = [B; 0]; H = 1.0e+12 *...

oltre 3 anni fa | 1

| accettato

Carica altro