Answered
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

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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

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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

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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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Answered
varagin with original var names
inputname can be used to return the name of the variable in the calling workspace as a character vector, at least for simple cal...

2 years ago | 1

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Question

Is Matlab consistently and correctly handling symbolic expressions that include a dirac function applied at a point of discontinuity?
Is Matlab consistently and correctly handling symbolic expressions that include a dirac function applied at a point of discontin...

2 years ago | 1 answer | 0

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Matlab's numeric solution to det of Matrix is incorrect
Hi ThanosST, Are you sure the expressions in B are entered correctly? Asking because it sure looks like L = 3.9407 is the solu...

2 years ago | 0

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Cauchy integral theorem vs. integral formula
Hi Luqman, The numerical integration is using a step size that is proably too large to capture the rapid variation in the integ...

2 years ago | 1

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Answered
Integral and inverse integral
The attachment convolution.jpg is confusing. Equation (15) defines Pf(x) as a convolution. But the unnumbered equation in the ri...

2 years ago | 1

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Answered
Euler's identity with angle in degrees
If the input is given in degrees, consider writing your own function using cosd and sind for accurate results at the 90 deg inte...

2 years ago | 1

Answered
MATLAB code to SIMULINK block ?
One way to get started may be to wrap the ultrasonic sensor code in a function, and call that function from a Simulink MatlabFun...

2 years ago | 0

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Convolution of function on a non symmetric axis using 'conv'
Hi MMG1 It looks like the code is using the convolution sum to approximate a convolution integral. Is that correct? If so, my c...

2 years ago | 1

Answered
How to Convert a 3D Matrix into Cell Array of Desire Dimension
A = rand(2,100,500); % example data C = squeeze(num2cell(A,[1 2])); % create cell array whos C isequal(cat(3,C{:}),A) % veri...

2 years ago | 1

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Answered
Matlab giving error for tall array assignment
The code doesn't define a variable named grid. It's getting confused with the function grid

2 years ago | 1