Community Profile

photo

Birdman


Last seen: Today
1.189 total contributions since 2017

Someone who is interested in Mathematics, Control and Engineering. Also, music as a hobby.

Contact

Birdman's Badges

  • Revival Level 3
  • First Submission
  • 6 Month Streak
  • Guiding Light
  • Promoter
  • Solver
  • Knowledgeable Level 4
  • Thankful Level 2
  • First Answer

View details...

Contributions in
View by

Answered
plot signal of time domain
syms x(t) x(t)=sin(2*pi*0.1*t); t=0:0.001:10; plot(t,x(-2*t+3))

1 día ago | 0

Answered
how do i plot step response of a system using fourier transform?
If you are dealing with s domain, you need to use ilaplace. Try this: syms t; G = tf([1], [1 0.9 5]); [num,den] = tfdata(G); ...

1 día ago | 0

Answered
Matrix Loop Code Question
P_resultant=cumsum([400 -Loss]); P_resultant(1)=[]

1 día ago | 0

Answered
Covert cell array to array
Something like this? Array=cell2mat(CellArrar.')

2 días ago | 1

| accepted

Solved


Doubling elements in a vector
Given the vector A, return B in which all numbers in A are doubling. So for: A = [ 1 5 8 ] then B = [ 1 1 5 ...

2 días ago

Solved


Remove all the words that end with "ain"
Given the string s1, return the string s2 with the target characters removed. For example, given s1 = 'the main event' your ...

2 días ago

Answered
Plotting the solution to a system of second order differential equations
Is there a way I can generate a single plot instead of four plots, for example, the plot of θ(t) vs x(t)? Yes you can, with th...

2 días ago | 0

| accepted

Answered
Change detection using simulink
I tried to make a model for you, where I tried to build a signal based on your description. Please click on the Signal Builder b...

2 días ago | 0

Answered
Typing a long and complicated equation
syms y(t) eq=2*pi*(sqrt((y-44.56)/(-0.16))+1)*sqrt(1+((1)/(-0.32*((sqrt((y-44.56)/(-0.16))+1))+0.32))^2)

2 días ago | 0

| accepted

Answered
i have a problem with simulink when run simulation it's stop in 2%
Go to Configuration Parameters->Solver section and choose Fixed Step solver and its type as ode5. Then, set the sample time as 0...

2 días ago | 0

| accepted

Answered
Maximum and Minimum values of a field structure array
%find max and min population [Cmax,maxIdx]=max(AustralianStates.Population) [Cmin,minIdx]=min(AustralianStates.Population) %f...

3 días ago | 0

Answered
How to exclude certain rows and columns based on a column value?
Firstly, at your first line of code, you started checking from the beginning of a. Instead, you should be checking the 23rd colu...

3 días ago | 0

| accepted

Answered
Changing the values of an array with an if condition inside a for-loop
Maybe the following code will get you going: x = 10; y = 10; xo = [20 30 35 50 65]; yo = [13 25 35 38 45]; rho_r = sqrt((x-...

3 días ago | 1

Answered
Calling a derived value as legends in plot
After the loop, run the following line: legend(reshape(sprintf('%d',Zeta),numel(Zeta),1))

3 días ago | 0

Answered
I need to find the displacement and velocity characteristics of a suspended mass on a boat. I am struggling to develop a state space expression that can take a sinusoidal input, and then to plot graphs of displacement and velocity from this.
You need to define your outputs(with C matrix) correctly. Since you would like to see both displacement and velocity, then C mat...

3 días ago | 0

| accepted

Answered
How to plot a smooth graph?
You need to increase the step size of your t vector: t = linspace(0,10,100); Code: b0 = 0.015; b1 = 0.015; b2 = 0.035; b3 ...

3 días ago | 1

| accepted

Answered
How to indicate that there are no zeros for a transfer function for the command zpk?
zpk([],[0 0 0],1) You basically leave zero input section empty as above.

3 días ago | 0

| accepted

Answered
pid tunnig with non unity feedback
Try the following approach: s=tf('s'); %needed to define transfer function in s domain G=1/3*s+4;H=1/(0.1*s+1); %if feedback i...

3 días ago | 0

| accepted

Answered
Symbolic solution to a system of algebraic equations
syms a b x N g b L m eqns = [(1/b)*(-2*N*sin(a))/3==m*L, x/b==-(5*L*cos(a))/6+(5*a^2*L*sin(a))/6, N/b==m*(5*L*sin(a))/6+(5*a^2*...

3 días ago | 0

| accepted

Answered
Simple Matrix Reduction Question. Ones and Zeros.
[rows,cols]=find(A==1); [C,I]=sort(rows); B=cols(I)

3 días ago | 0

| accepted

Answered
Integrating using sums(riemann sums)
You may use rsums. It allows you to interactively calculate the riemann sum integral: rsums(f,5,17.688) Riemann Sum Integral

3 días ago | 0

| accepted

Answered
how to solve equation with a function solution matlab
Try this: syms s H2new G1=1/(s-1); G2=s^2-s; H1=s^2-1; H2=-1/s; G=(G1*G2)/(1+G1*H1+G1*G2*H2); H1new=s^2+9*s-10; Gnew=(G1...

3 días ago | 1

Answered
Taking data from matrix and using it in a function
As far as I understand, you want to change E1, E2, E3 and E4 respectively with combinations of -1 and 1. So the following code d...

4 días ago | 0

Answered
plot the exp function
syms y(t) eq=diff(y,2)+13*diff(y)+40*y==4; Dy=diff(y); Y(t)=dsolve(eq,[y(0)==0 Dy(0)==0]) t=0:0.001:0.9; plot(t,Y(t))

4 días ago | 0

| accepted

Answered
What is better for differential equations - MATLAB or Simulink?
Simulink works numerically, you can not solve differential equations symbolically in Simulink. If you want to obtain symbolic so...

4 días ago | 0

Answered
I want to add a 45-degree line on my plot. I tried some ways (including refline) all give me a 38-degree line!
Try the following: figure(1);hold on; MONTHLY=scatter(X,Y); plot(0:600); %45 degree line plot(0:600,0.73*(0:600)+6.47); %tre...

4 días ago | 1

| accepted

Answered
What is this Simulink Block called in the library browser?
That block seems to be a discretized sine wave. You can find it in Sources library. Also, you can discretize the Sine wave block...

4 días ago | 0

Answered
how do i check if a number is a prime number, a square, and or a factor of 6?
n=4; %check if number is prime isprime(n) %returns logical value %check if number is square mod(numel(factor(n)),2)==0 %retu...

4 días ago | 1

| accepted

Answered
How to solve 2nd order differential equations while variables are coupled?
Try the following code: syms w U1r(x) U1i(x) U2i(x) U2r(x) L m d eq1=(w-1)*U1r-diff(U1i)+L*U2r-m*diff(U1r,2)==0; eq2=(w+1)*U...

4 días ago | 0

| accepted

Load more