Saving output of for loop in array
There are some mistakes and unclear parts in your code. However, using your code, you can save it as; Pload = linspace (1,2...

12ヶ月 前 | 0

Find the frequency at maximum value in pwelch function
You can obtain the frequency and power vectors from pwelch function. Example; fs = 1e3; t = 0:1/fs:1-1/fs; x = sin(2*...

12ヶ月 前 | 0

plot for x^2+y^2==3*x*y^2, x^3-x^2==y^2-y in matlab
syms x y real eq1 = x^2+y^2==3*x*y^2; eq2 = x^3-x^2==y^2-y; figure(1) ezplot(eq1) figure(2) ezplot(eq2) ...

12ヶ月 前 | 0

Plotting FFT of several data sets (signals) of same length, in the same graph
y = [] just makes y an empty matrix. It is not a necessary code. I include it in the off chance that you had a variable named y ...

12ヶ月 前 | 0

Listing possible combinations of integers, given constraints (Gear Ratio Related)
One possibility is using an optimization. Here is a simple code for it using OPTI toolbox; clear all,clc % round() is...

Count two columns with corresponding data
One thing you can do is (assuming you have newer versions of matlab); A = rand(10,2); % the data a1 = A(A(:,1)<0.3,:); ...

Damping Factor and natural frequency out of time response data
If this is impulse response, you can get the natural frequency by simply finding the time difference between each peak. Invertin...

Interpolate between two signals in Simulink
Here is how linear interpolation works; y1 = 10; % known flow rate for 47500 ft y0 = 2; % known flow rate for 23000 ft...

Plotting FFT of several data sets (signals) of same length, in the same graph
You put all of the signals you want in a matrix (each column is a different partition of the signal); data = rand(60000,1)...

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ODE45 not updating a variable of nonlinear 2nd order diff.eq system
The reason is simple. Your dxdt(3) is always equal to 0. You do not have an equation for dxdt(3) in your function other than the...

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How can i measure Angle in 3-D?

Eulers Method Returning an Answer close but not exactly correct
The reason is simple. The time in your code start from 1 where as online calculators start from 0. If you adjusted your equat...

How to conditionally solve two ODEs simultaneously using 'if-else' ?
ode45 does not check its values between start and end time. That is why you need to write your own solver or include the ifelse ...

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First you create your function that outputs derivative of q when time and q are given to it. function qd = asd(t,q) k1...

Can I issue a command to see when my license expires?

mod(a,b) floating-point rounding error
x(3,121) is not exactly 0.2. It is slightly less than 0.2. That is why when Matlabs mod() function does its algorithm, which is;...

Unable to perform assignment because the size of the left side is 1-by-1 and the size of the right side is 11-by-11.
Here is the problem; DpiE(i,j)=DPiIX/DtX Both DPiTX and DTX are 11x1 vectors. When you divide 11x1 with 11x1 Matlab thin...

What is the question? I assume the question is why the answers are different. Answer is simple 10e-12 is not equal 10^-1...

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How to extract the exponential term?
Here is one way; floor(log10(1.2346e+02))

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I want to make a programming function in which I want to take input any mathematical function like f(x)=sin(x)+x^2. then I take a input x and my function return a value of f(x).but i don't know how can i do?
Here is a simple Matlab script; f_math = @(x) sin(x)+x.^2;% mathematical function, notice the element wise operation fun...

How to force zero or positive entries in matrix when solving LMI?
You can simply add another constraint to the LMI to impose the constraint. For instance, assume decision variables are x and ...

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How to create for loop for the below case
First of all, your code does not look like it is in order. You define C after you calculate Q? You do not use X in any calculati...

How to feed timeseries data to parameter
One way is to define the parameter as a signal (if the parameter is in the gain inside a gain block, change the gain block to pr...

returning values of a matrix between two values
desiredData = data(:,event_samples(1):event_samples(end))

Closed-loop system identification
Assuming you can add excitation signal to u, and with large enough excitation signal magnitude, you can identify G1 without know...

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How to make semilogx to get a plot gain against log frequency with several values?
Is this what you want; freq = [2 10 20 60 100 125 150 200 300 400]; Vo = [0.15e-7 .1e-3 .002 .2 1.5 3.28 4.47 4.97 4....

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solving rlc circuit using ode45
If you were to use the code; [t,y] = ode45(@homework,t,[0 0 0]'); the y here is your i1, i2, and vc. From here yo...

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How to plot a numerical integration?
The problem is, the quadgk function expect a scalar value from your function. However you assign z to be a vector, hence your fu...

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Why FOR LOOP doesn't work for the descrete state space?
The reason is continous time and discrete time A and B matrices are different. In the code you are not using the right A and B m...

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Matlab continues to run and wont stop. Is my solution to complicated?
Try doing this in your code; fx = simplify(expand(diff(f,x))); fy = simplify(expand(diff(f,x))); I think in your code, ...