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# M

##### Last seen: 2 days ago
288 total contributions since 2017

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Answered
Unrecognized function or variable x
As the error message says, the variable 'x' is not declared before it is used line 7. How do you execute this function ? Is i...

2 days ago | 0

Answered
MIMO control system with marginally stable poles at the origin
How do you test the pole zero locations ? Here, you have a pole equal to 0.

26 days ago | 0

Answered
Determine suitable control gain for the controller
Well, this is a vague question... To tune the gain you either need a model of your system and do some calculations, or if you d...

30 days ago | 0

Answered
How to save indices of a certain region of a matrix
I am not sure if I understood your question but here is a second simple example: A = [10 11 12;13 14 15; 16 17 18]; B = [14 15...

1 month ago | 0

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Answered
i would like to create a randi function that will allow me to generate two arguments at one
Suppose you have a n by n matrix: n = 5; T = magic(n); You can access a random cell in this matrix by using: c = randi(n,[1,...

1 month ago | 0

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Answered
MATLAB R2019A
Here: https://www.mathworks.com/pricing-licensing.html?prodcode=ML&intendeduse=student

1 month ago | 0

Answered
i m getting 'subscript assignment dimension mismatch' in my code in 'line 18'
You have a problem of dimensions at line 18: pilotdata(p,J)=Mod(p,k); At the first iteration, it holds: p = 1,...

1 month ago | 0

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Answered
Constrained Global Optimization Problem with MultiStart, GA and HybridFunction using Parallel Processing whithout Ste
Update your code like this: A=rand(2,2); B=[1 ;0]; n = length (A); Com = B; for x = 1: n-1 Com = [Com, (A ^ (x)) * B]...

1 month ago | 1

Answered
How can I work on a valuable name with a minus sign in it...?
From this documentation: https://mathworks.com/help/matlab/matlab_prog/variable-names.html "valid variable name starts with a ...

1 month ago | 1

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Answered
I don't get the correct output from my function
When you change from -5 to -10, the absissa of the plots change, yes. But the value of the function does not change. What makes ...

1 month ago | 0

Answered
How do I get my function to return a numerical value?
The function HW5VJ0 returns a function handle. To get a numerical value, you have to call it with the specified value of x: x =...

1 month ago | 0

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Answered
How to make a 3D plot of 41x41x41 datapoints
You can have a look here to see different solutions to plot data in 3D: https://mathworks.com/help/matlab/visualize/creating-3-...

2 months ago | 0

Answered
I want to apply bubble sort
bubblesort is defined such that it takes only one input (the table to sort). And you call it with two inputs : A=bubbleSort(A,9...

3 months ago | 0

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Answered
Obtaining result from a previous point
Have a look here: https://mathworks.com/help/matlab/matlab_prog/loop-control-statements.html https://mathworks.com/help/matlab...

3 months ago | 0

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Answered
symbolic system of equation
First problems on lines 2 to 4: gamma=sym(zeros(i,1)); w=sym(zeros(i,1)); l=sym(zeros(i,1)); i is not yet defined.

3 months ago | 0

Answered
What is the difference between the fixed point and floating point modeling in simulink ?
Have a look at these documentations : https://mathworks.com/help/comm/ug/floating-point-and-fixed-point-data-types.html https:...

4 months ago | 1

Answered
select from matrix!
When executing the command it outputs : b = 3 2 2 1 The command : b= [a(1,2:3);a(2,1:2)] sel...

4 months ago | 1

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Answered
plot standard deviation as a shaded area
You can use the code directly from this answer: https://mathworks.com/matlabcentral/answers/180829-shade-area-between-graphs#an...

4 months ago | 1

Answered
How to make a array from a loop?
You can do something like: nb = 1440; j = zeros(1,nb); Z = zeros(1,nb); for i = 1 : nb Z(i) = powerConsumption(i) - sol...

4 months ago | 0

Answered
System unit-impulse response for given tau
There is a problem of dimensions for matrix multiplication at line 5 and 6 : x1 = (A/tau1)*exp(t/-tau1) x2 = (A/tau2)*exp(t/-t...

5 months ago | 0

Answered
When we use the ";" at the end of a command line and when we do not use it
From https://www.tutorialspoint.com/matlab/matlab_syntax.htm : Semicolon (;) indicates end of statement. However, if you want t...

5 months ago | 0

Answered
adding element to a matrix row
You can read this to know about matrix indexing: https://www.mathworks.com/company/newsletters/articles/matrix-indexing-in-matl...

5 months ago | 0

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Answered
Control of inverted pendulum
I don't find anything similar in literature LQR algorithm with state estimator is very common and you can find plenty of exampl...

5 months ago | 0

Answered
Find elements in a matrix
You can get the indices with: idx = A >= 30 & A <= 65 To know the number of values corresponding to the condition: numel(find...

5 months ago | 0

Answered
Is there any maximum for the size of matlab table?
It depends on what you want to store into this table. You can have a look here to find more informations: https://mathworks.com...

5 months ago | 0

Solved

Find the maximum number of decimal places in a set of numbers
Given a vector or matrix of values, calculate the maximum number of decimal places within the input. Trailing zeros do not coun...

5 months ago

Answered
function rand with variables
You can use something like this, adapt it to your case: a = 1; b = 2; c = 3; A = [a b c]; nb = 10; vec = zeros(1,nb); for...

5 months ago | 0

Solved

Check that number is whole number
Check that number is whole number Say x=15, then answer is 1. x=15.2 , then answer is 0. <http://en.wikipedia.org/wiki/Whole...

5 months ago

Answered
('tf' requires one of the following) "tf commend is not working" HELP PLS!
Your code is right, but you do not have the required toolbox. The function tf is part of the 4 toolbox listed in the error messa...

5 months ago | 2

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Answered
Any methods to solve optimal control indirect method such as Pontryagin Minimum Principle?
Hi, here are some related questions to start with: https://mathworks.com/matlabcentral/answers/440335-how-to-implement-optimal...

5 months ago | 0

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