Answered
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...

2 years ago | 0

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Answered
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...

2 years ago | 0

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Answered
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)); ...

2 years ago | 0

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

2 years ago | 1

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Answered
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,...

2 years ago | 0

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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...

2 years ago | 0

Answered
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...

2 years ago | 1

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Answered
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...

2 years ago | 0

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Answered
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? ...

2 years ago | 2

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Answered
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...

2 years ago | 0

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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...

2 years ago | 0

Question

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...

2 years ago | 1 answer | 0

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Answered
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)

2 years ago | 0

Answered
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 *...

2 years ago | 1

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Question

What are Your Thoughts on TMW Documentation Linking to the File Exchange
Kind of similar to this Question, I noticed that the Tips section of integral3 cites this File Exchange submission as an option ...

2 years ago | 2 answers | 0

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Answered
Why am I getting different frequency responses for the same filter using bode() and fvtool()?
Hi Rinitha, Here is the design of the low pass filter fs = 500; % Sampling frequency Ts = 1/fs; fc = 100; % Cutoff frequency...

2 years ago | 2

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Answered
Reference Frame for Forces Going into 6DOF (Euler Angles)
According to 6DOF (Euler Angles), the force inputs are the components of the net force resolved in Body Coordinates. If the "Z d...

2 years ago | 0

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Question

What are the Pros and Cons of the RandStream Transformation Algorithms?
RandStream objects offer three choices for the transformation algorithm for computing standard normal random variates as shown o...

2 years ago | 1 answer | 0

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Manually compute LQI() gains using Algebraic Riccati Equation / Hamiltonian
Hi John, I just copy/pasted the code from the question (not the attached .m file) with some semicolons to suppress output and i...

2 years ago | 0

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Answered
Calculating a mean matrix of a cell array
Try mean(cat(3,A{:}),3,'omitnan') The omitnan flag will ignor the nan entries in the computation of the mean.

2 years ago | 0

Answered
Shift and duplicate values in a data set
Couple of options M = magic(4); Z = zeros(12,4); for ii = 1:3 Z(4*(ii-1)+1:4*(ii-1)+4,:) = [zeros(4,ii-1) M(:,1:end-ii+1...

2 years ago | 0

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Answered
Assign array in field struct
Example data Sis(1).a = 1; Sis(2).a = 2; Sis(3).a = 3; c = [30 40 50]; Assign elements of c to new field of elements of Sis...

2 years ago | 0

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Answered
Why Does get_param(gcb,CompiledPort*) Return Weird Results for Several Object Parameters ?
Thanks to @Andy Bartlett discussion in this thread, and further review the doc, the model has to be put into compile mode before...

2 years ago | 0

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Answered
simulation issue about Scope
Hi wenchao zhang, The Constant block, by default, has a constant sample time. For the model shown, constant sample time means t...

2 years ago | 0

Answered
How to declare a function as extrinsic and execute it in Simulink through Matlab Function block
Try using coder.extrinsic to declare the wrapper .m function as extrinsic in the Matlab Function block and call the java functio...

2 years ago | 1

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Answered
Create a local system of equations function from a set of anonymous functions
One approach: equations = {'@(x1,x2)x1.^2+x2-6','@(x1,x2)-2.5.*x1+x2.^2-2'};%Set your equations N = numel(equations); f = ce...

2 years ago | 0

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How to remove struct fields of a specific type
The function class can be used in a loop over the fieldnames to identify the fields to be removed with rmfield. s.w = int32(0);...

2 years ago | 1

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Answered
Understanding the following step in MATLAB
The elements in symbols range from 0 - 3, but Matlab uses 1-based indexing, i.e. the indices int0 constellation can only be 1-4....

2 years ago | 1

Answered
Can't tell if exprnd is working correctly
Hi Umberto, I modified the code so that the actual figure of merit that is computed is the difference between the running sampl...

2 years ago | 0

Answered
Andrews plot function for multivariate control chart limits UCL and LCL
Brute force approach ... Use symbolic for illustration syms theta p = 5; A = reshape([sin((1:p)*theta) ; cos((1:p)*theta)],1...

2 years ago | 0

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