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# Sulaymon Eshkabilov

Last seen: ein Tag vor Aktiv seit 2019

research interests: vibrations, optimal control, system modeling and simulation, mechatronics... coding

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Beantwortet
how to use partial derivative in fraction form in latex intepreter
Here is one simple example on how to use latex to display partial derivatives, e.g: fplot(@(t)exp(sin(2*t)), [-pi, pi]) title(...

etwa 14 Stunden vor | 0

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How to read all sheets from an excel and output them
An alternative solution to this exercise with MATLAB recommended functions is: clf FName ='Exercise1.xlsx'; S_names = sheetna...

etwa 16 Stunden vor | 0

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How can I solve this expression for Qi_s/thetha_s = ....?
To get a transfer function, you should divide both sides of the equation by theta_s, and you will get this: % Qi_s/C-theta_s/(R...

ein Tag vor | 0

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Issues in the constraint functions of the Optimization Problem solving
There should be elementwise operations in ceq formulation if M2, beta1, beta2 and P are vectors.

3 Tage vor | 0

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Why my symbolic result of eigenvalue doesn't match my numeric result?
The reason for having three different eigen values can be explained with the followings: Eigenvalues1 = eig([2 0 0; 0 2 0; 0 0 ...

3 Tage vor | 0

Beantwortet
Exponential approximation for vector input
You have overlooked one dot. Here is the corrected commands: vect = [-5.0000 -5.0000 -5.0000 1.0000 0.9000 0.8000...

3 Tage vor | 0

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Beantwortet
How do I get I pass out the input parameter to ode45 integration
There are a couple of overlooked points as Torsten pinpointed out. Here is one simple explae of dx = 2x example solution very si...

3 Tage vor | 0

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How do i find the standard deviation of every row of a 12*18 cell array?
Her is one solution: C = load('mean.mat').z; S =C; for ii = 1:12 for jj=1:18 IDX = isnan(C{ii,jj}); ...

4 Tage vor | 0

Beantwortet
How can we re construct images with equation for temperature distribution. ?
Use gtext() to display the equation

4 Tage vor | 0

Beantwortet
Processing Time for Data
You can try: tic .. toc

4 Tage vor | 0

Beantwortet
Training and splitting a custom dataset
In this case, there are a few ways - cvpartition() and datasample() to split/partition the data into training and test data sets...

5 Tage vor | 1

Beantwortet
movavg with custom type and weights
In this case, it is better to use filter() that gives a good moving average filter solution: A = 1:5; B = [.5 .5 ]; Out_A = f...

5 Tage vor | 0

Beantwortet
why this code gives error?
Here is the corrected code: [color, I_map]=imread('C:\Users\User\Desktop\matlab\photo.png'); gray=rgb2gray(color); gray=doubl...

5 Tage vor | 0

Beantwortet
Plotting a signal function
This can be also solved using griddedInterPolant(), e.g.: % Solution # 1. Y = [0 1 1 2 2 -1 -1 0 ]; % y data X ...

5 Tage vor | 0

Beantwortet
How to draw a 3D phase plane using three differential equations with 5 parameters
First of all, you need to have the param values for alpha, beta, tau, gamma, delta and initial conditions for D1, D2, h. This ex...

5 Tage vor | 0

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Beantwortet
How to multiply, in a loop, a function by a variable from a matrix and plot the change.
Here is the corrected code with some modifications to imptove the computational efficiency of the code. Note that x1 is not chan...

5 Tage vor | 1

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Beantwortet
A system of nonlinear equations with three variables
In your code, there are a few errors with matrix operations. It is more computationally to use vectorized approach instead of f...

5 Tage vor | 0

Beantwortet
How to send variable signals in Simulink?
Simulink has [From Spreadsheet] block that can be used to read data from an external file - *.csv. Here is one example (DATA_re...

5 Tage vor | 0

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Beantwortet
Simulink "MATLAB Function" block and extremum value
Note that there are a couple of important points here. (1) v input argument values have to be given/known to perform the calcula...

5 Tage vor | 0

Beantwortet
Using vertcat to convert cellarray consisting of mutiple columns into an array of multiple columns
Here is how it can be attained: C1 = {randi(3, 3)}; C2 = {ones(3)}; C3 = {zeros(3)}; C4 = {randi(3, 3)}; C5 = {ones(3)}; ...

5 Tage vor | 0

Beantwortet
Global error and local error of euler method
Yes, error increase if h step size increases. See this simple example: dy = y(t) with y(0) = 3; y(n+1) =y(n)+h*f(t(n), y(n)); ...

5 Tage vor | 0

Beantwortet
vertical concatenate strings in msgbox
Here is the corrected code: v = VideoReader(filename); % Create Videoreader object %Get i...

5 Tage vor | 1

Beantwortet
Automatically sorting years and quarters in a serial number
One of the easy solutions is to cretae a table array with variable names: Year (numerical) and Quarter (categorical array), e.g....

5 Tage vor | 0

Beantwortet
Why won't my graph plot properly in the live script?
Your shown screenshot shows that you are viewing it in MLX- editor. If you hover your mouse over your plotted figure and click o...

5 Tage vor | 0

Beantwortet
How to remove rows in a cell array?
Here is how you can do it: load('stations1.mat'); [Rs, Cs] = find(cellfun(@isempty, stations1)); stations1(Rs,:)=[];

6 Tage vor | 1

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Beantwortet
How to code equation
Put both functions in plot() command or use hold on: m = 10e-3; a = 0.05; c = 0.1; x1 = @(t)(m/a)*exp(-(c/a)*t); x2 = @(t)...

6 Tage vor | 0

Beantwortet
index error,exceeding array dimensions.
Here is the corrected code: Vet = randi([-9,9], 1, 7); dim = numel(Vet)+1; V = ordina(Vet,dim) function Vet_ord = ordina(Vet...

7 Tage vor | 0

Beantwortet
Plotting as intregral the acceleration of a thing
This is how you can solve this exercise: N=100; T=11; dt=T/N; t=0:dt:T; F = [0 2 2 0 0 -2 -2 0]; % Accel...

7 Tage vor | 0

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Beantwortet