# Sulaymon Eshkabilov

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

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Error using imread>get_full_filename (line 566) File "gg(21).jpg" does not exist. Error in imread (line 375) fullname = get_full_filename(filename);

You can add the path to the directory where your images are located using addpath(), e.g.: addpath('C:\Users\new\Testing')

4 days ago | 0

Generate and acquire signals with a DT9857E box using Matlab

It is all about DAQ DT9857E issue. Once we had also the same issue - a kind of exponential decay. So far, I remember what we ...

9 days ago | 0

| accepted

help with wavelet analysis - wcoherence plot

If understood your question correctly, follow this doc: https://www.mathworks.com/help/wavelet/ref/wcoherence.html#d126e131143 ...

9 days ago | 0

How to move the Yaxis exponent outside

Here is one example how to get it done: % Sample data for plot display x = linspace(0, 2*pi, 100); y = 1e6 * sin(x); %% De...

9 days ago | 1

how to find point from Table data in Simulink?

Do the followings: Feed the temperature and density values as inputs to the lookup table block The output of the lookup tab...

9 days ago | 1

Ray tracing in antenna chamber

Have you checked out this documentation: https://www.mathworks.com/help/comm/ref/rfprop.raytracing.html?s_tid=answers_rc2-1_p4_...

9 days ago | 0

Is this a logical Error in Matlab ? exp (pi*i*6) = 1.000000000000000 - 0.000000000000001i. WHY an i component ?, should just be 1

It is all about a display format: format short exp(pi*i*6) % compare with this: cos(6*pi)+1i*sin(6*pi) % Compare this: fo...

10 days ago | 0

Multiple loops to build structure?

It can be done somewhat what like this one: GN = {'Group 1:'; 'Group 2:'; 'Group 3:'}; NA = {'North'; 'East'; 'West']; for ...

10 days ago | 0

| accepted

How do I graphic

The given inequality does not have explicit solution. Therefore, by ignoring analytical constraints, these can be obtained: sym...

10 days ago | 0

Starting with the ramp signal r(t) and unit step signal u(t) given below, please write the codes to plot the following transformed versions (a-f):

t=-10:10; figure plot(t,t); grid on xlabel('Samples') ylabel('Amplitude') title('Ramp') figure t2=[zeros(1,100), on...

11 days ago | 0

unable to connect blocks in Simulink

Use Simulink-PS converter block: https://www.mathworks.com/help/simscape/ref/simulinkpsconverter.html

11 days ago | 0

| accepted

how to plot two m.file in one plot

use plot(x, y), e.g.: x = [-5:5;2*(-5:5); 3*(-5:5)]; y = [3*x.^2+3*x-3; -5*x.^2+5*x-15; -2*x.^2-3*x-13;]; plot(x(1,:),y(1,:),...

11 days ago | 0

Inverse FFT of a matrix

Just looking at your attached figure, it is clear along x axis is time. inverse FFT gives back time domain data from freq domain...

11 days ago | 0

Why can't I run my code? (tfest function)

Here it is running ok: x = readtable('data_thermal_pulse.txt'); time = x.Var1; T1 = x.Var2-x.Var2(1); input = x.Var4; Ts = ...

11 days ago | 0

Why does this function not work for decimals?

Here is the corrected answer (Note abs(x)<=1): % x = input("Please enter the value of x (in radians): "); % Here "input" prom...

11 days ago | 0

| accepted

How to find an area below the curve follwed by x and y axis having two different parameters?

That would be something like this: DATA = [53 100; 26.5 88.5; 9.5 64.95; 4.75 46.85; 2.36 25.34; 0.85 23.14; 0.425 0;]; ...

18 days ago | 0

help understand the step size of the electrical engine dyno example

Click on Modeling Tab --> Model Explorer --> Base Workspace, and then you will see that the sampling time is 1E-5 in seconds. Se...

18 days ago | 0

How to randomly sample output times in Simbiology?

To randomly generate values using MEAN and STD values, normrnd() fcn can be used: MEAN_val = 15; % Mean in minutes STD_dev ...

18 days ago | 0

How to get rid of Noise in Simulink?

There are a few blocks can be used. E.g., Discrete Filter (Transfer Function), Discrete FIR Filter, etc., whcih can be found: Si...

22 days ago | 0

Matlab Plotting command problem

Even though you have not mentioned any error, there is a tiny point linked with hold on command. It needs to be followed at the ...

22 days ago | 0

| accepted

How to ignore special characters and retrieve the data prior to the character

Here is one possible solution, to get the data correctly from the data file: % Open the data file for reading FID = fopen('tem...

22 days ago | 0

Solve equations of motion containing matrices and partial derivatives

Your posted code has a few critical issues to be addressed before executing it. (1) epsilon_rp is undefined; (2) y(1) =4.3; bu...

29 days ago | 0

Summing two signals should result in zero, but doesn't

Note that the matlab's PRECISION is not ABSOLUTE. See this example of Pythogorian theorem: a = -pi:pi/100:pi; F = 1 - (sin(a)....

1 month ago | 0

how to convert a 3D surface into a 2D contour?

Note that it is clear from the colorbar scale (Figure 2 in your question) that there must be another operation before obtaining ...

1 month ago | 0

Error in resampling function

If you want to use fs = 5000 Hz, then the command syntax has to be resample(x_siganl, time, fs_new) This is how it should be don...

1 month ago | 0

| accepted

How to compute forces in global reference frame?

Presuming that you are also using some blocks from SimScape toolbox in the Simulink environment, here are some points to conside...

1 month ago | 0

How do I change the current directory in Simulink Onramp?

Even if you are working online, you can still go for "Save As" option (upper left corner) to select the directory where to save ...

1 month ago | 1

how to convert a 3D surface into a 2D contour?

This is how it can be done: H = openfig('ds2.fig'); % This is the extracted plot figure h = findobj(gca, 'Type', 'surfac...

1 month ago | 0

Use of interp2 in an arbitrary dataset

Is this what you wanted to obtain: % Given DATA: Data = [ 0.25 0.25 0.5; 0.50 0.60 1.5; 0.75 0.75 3.0];...

1 month ago | 0

How to do bit-wise operations on symbolic variables that may be very long possibly larger than inter 64

Is this what you are trying to get: syms a b c n % Create symbols a = 12345; b = 9867; c = sym(0); n = 0; while a > ...

1 month ago | 1