Respondida
Numerical precision issues when using tf('s')
I thin the general recommendation is that zpk is superior to tf, and that ss is superior to both. See Using the Right Model Repr...

9 meses hace | 1

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Pregunta

How Do Assignment and Deletion Work with an Empty Index on the Left Hand Side ?
I've always thought that indexing with an empty array on the LHS of an = is a no-op for the variable on the LHS (there could be ...

9 meses hace | 1 respuesta | 0

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respuesta

Pregunta

Must a Function be in Scope Before Creating a Handle to It?
The doc page Create Function Handle states: "Keep the following in mind when creating handles to functions: Scope — The functi...

9 meses hace | 1 respuesta | 1

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respuesta

Respondida
Different Output using For Loop vs Elementwise operation
x = linspace(0,pi,100); y = cos(x); This probably isn't what you want. Perhaps you mean z = zeros(size(x)) or something simila...

10 meses hace | 0

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Respondida
Looking for an efficient way to run Simulink on thousands of independent files
If I'm understanding the workflow correctly, it seems like you could set up a loop to read in each mat file and set the appropri...

10 meses hace | 0

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Respondida
Making random to work like randi
I wonder why makedist doesn't support Uniform Distribution (Discrete). But random can be called with that distribution. N_clus...

10 meses hace | 1

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Respondida
Use case for eval that double/subs does not satisfy
Hi Stephen, Check out matlabFunction syms x1(t) x2(t) k12 k21 k20 k01 conds = [x1(0) == k01; x2(0) == 0]; eqn1 = diff(x1) ==...

10 meses hace | 3

Respondida
Unexpected Perturbation of Constant Inputs During Full-System Linearization
Hi Gabriele, I wasn't able to create a simple model to replicate the problem, so I can't say for sure that what follows is 100%...

10 meses hace | 0

Respondida
How to avoid redefining optimoptions in Simulink for real-time nonlinear optimization with fmincon (SQP)?
Are you really using a Matlab Function block? If so have you tried: function y = fcn(u) persistent options if isempty(opti...

10 meses hace | 1

Respondida
How to correct numerical errors when using a chain of integrators in simulink
The initial conditions on the integrators need to be set to appropriate values to yield the expected result. Define the yellow ...

10 meses hace | 1

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Respondida
How can I get the correct answer for int(1/x) with symbolic integration?
Seems like the OP might be missing a sign(x), though I'm not really sure how to intrepret this result. syms x real d = diff(lo...

10 meses hace | 0

Respondida
SubSystem block does not have a parameter named 'MATLABFunction'
The function code in the Matlab Function block can be modified programatically using MATLABFunctionConfiguration

10 meses hace | 0

Respondida
Question about entry-wise product of general plant and weighting function matrix using Hinfstruct for multi-objective design
Continuing the discussion from this comment .... To use hinfstruct using the entrywise multiplicaiton of T(s) and W(s), it seem...

10 meses hace | 0

Respondida
Matrix multiplication bugged?
Hi Antonio, Multiplying a matrix by [1;0;0] on the right should return the first column of the matrix, which is exactly the res...

10 meses hace | 1

Pregunta

Do Symbolic simplify() and expand() of Expressions Involving nchoosek() Make Sense?
Define a simple nCk expression syms k integer e = nchoosek(2,k) Evaluate at some values. Evaluation for k<0 and k>2 returns 0...

11 meses hace | 1 respuesta | 0

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Respondida
Result of symbolic definite integral is clearly wrong
Hi Dan, Add assumptions on variables, might help with simplifications. syms t real syms d integer syms k integer cutoff(t) ...

11 meses hace | 1

Respondida
How to Control Simulink from Matlab during Simulation
Perhaps dashboard blocks would be helpful.

11 meses hace | 0

Respondida
Simulink parameters change during simulation from Matlab cmd line
To be clear, the intent is to change at the command line, while the simulation is running, base workspace variables that are blo...

11 meses hace | 0

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Pregunta

Why Can an Anonymous Function be Defined with a Non-Existent Parameter?
Define an anonymous function with one argument (x) and one parameter (y) f = @(x) x + y; I'm suprised that line sails through ...

11 meses hace | 1 respuesta | 1

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Respondida
How to write a timetable to excel with rowtimes as dates without times?
"If there was a way in Matlab to change the format in the first column in the excel file from "m/d/yy hh:mm" to "d-mmm-yyyy", my...

11 meses hace | 0

Respondida
Matlab sorting numbers oddly
Hi Elijah, Would be helpful if you showed the code for reading the files. If I'm understanding correctly, maybe you could use ...

11 meses hace | 0

Respondida
Zero-Padding Position for FFT
Hi Jason, The data in x can't span exactly -0.5*T to 0.5*T if it has an even number of uniformly spaced samples. Assuming the ...

11 meses hace | 0

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Respondida
How To Handled Fixed Point Datatype in Simulink if I am Not Having Fixed Point Designer Licence?
Hi Anup, If by "handle fixed Datatype" you mean that you have to work with a model that uses fixed-point functionality, check o...

11 meses hace | 0

Resuelto

Generate a vector like 1,2,2,3,3,3,4,4,4,4
Generate a vector like 1,2,2,3,3,3,4,4,4,4 So if n = 3, then return [1 2 2 3 3 3] And if n = 5, then return [1 2 2 3 3 3 4...

11 meses hace

Discussion

Answers Acting Flaky?
For the last day or two, I've been getting "upstream" and other various errors on Answers. Seems to come and go. Anyone else hav...

11 meses hace | 0

Respondida
Shading area between 2 curves (x function in terms of y)
Here are the plots of the functions. The independent variable is y, which spans the x-axis on the fplot syms x y x1=y^2; x2=y...

11 meses hace | 0

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Respondida
Indexing vectors with a zero and creating a "predicted" vector knowing what the diff should be
This solution is similar in spirit to that in this comment, which I think is the best approach based on how the problem has been...

11 meses hace | 0

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Respondida
How can I plot 10 shifted single impulses in one plot (in a row)?
imp = @(x) sech(x); S0 = @(x) imp(x).*(x<=0); % assumes S0(0) = sech(0) ub = 10; x_imp = linspace(-ub, ub, 1001); x_S0 =...

11 meses hace | 1

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Respondida
The sine wave comes out as flat as flat line .
The yellow line likely isn't flat, it just looks that way becuase the y-axis is scaled by 10^15. Try sending the that signal to ...

11 meses hace | 2

Respondida
Simulink Matlab Fcn, logical error for incrementation in Goertzel's algorithm
Hi bieron surya, Every time the function executes it hits the line count = single(0); which does exactly what it says, i.e., ...

11 meses hace | 0

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