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To find integral of a function in loop
Try replacing q = integral(f,6e-7, x); with q(i) = integral(f,6e-7, x(i));

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Numerical integration of the missile dynamic model
I don't know the actual problem, but if you look at your values of Y against time you will see that some of them are clearly div...

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Monte Carlo simulation for probability of a multi part machine working
Here's one possibility: % each A part works 98% of the time. Each B works 91% of the time. % The machine has 12A and 7B parts....

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Need help on using trapz on a definite integral
Replace Final = Nach + Vor; by Final(i) = Nach + Vor;

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Multiple parameter Non Linear Curve Fit- Error using ^
You probably need to use element by element multiplication and division etc in your definition of fun. I.e. use a.*b and a...

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How to separate plot titles on single line? [solved]
Define the titles with an extra space at the end of each word.

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Plotting to test probability convergence
See my reply to your question at https://uk.mathworks.com/matlabcentral/answers/871048-how-to-do-integration-of-this-equation-an...

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How to do integration of this equation and plot graph between T and y
Like this perhaps: u=0.020; x=0.025; z=0; t=5; eta= 0.6; P=200; C=500; ro= 1000; l=0.008; Alpha=17e-6; r = 0.01; % Gu...

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Making relative histogram for data, and a convergence diagram to see if enough trials have been run for monte carlo simulation.
Something like the following? N = 1000; Throwsum = zeros(N,1); Relativefreq = zeros(N,1); count = 0; for i=1:1000 throwD...

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Runge Kutta and Binary Search to analyze system of ODEs
At the moment you have dj/dt = -K*d0^2; which means rate of reduction of radius is constant. Since d0^2 is a constant this m...

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Gaussian Curve Plotting Issues
If you have 10000 individuals with a probability of 0.013 of being in group A, you would expect your curve to peak close to 130 ...

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Solve equation with 2 unknowns using solve
There are an infinite number of solutions! Restrict the range. One possibility is as follows bfn = @(a) acos(1.6-cos(a)); fn...

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Is this formula correct for simulate 3D Water rocket
Probably vy = v0*cos(alpha); should be more like vy = v0*cos(alpha)*cos(beta); where beta is an angle that will point the r...

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Need to Produce a different size matrix on each iteration
Try the following wqe=[1;2;3;4;5;6;7;8;9;10;11;12;13;14;15]; kli=[51;52;53;54;55;56;57;58;59;60;61;62;63;64;65]; hsd=size(kli...

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Getting error using syms to implement power formula
Like this? % Arbitrary values - replace with your own fs = 1; x_h = @(n) 1/(n+10)^2; %Power formula syms N...

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Solving a system of 12 ode’s with discrete data using Euler method
Look up interp1 doc interp1

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How to save all variables in for loop
Try load(i,:)=com(i,1)*sin(com(i,2)*t);

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How to handle a variable inside matrix without using syms toolbox?
Are you looking for somethig like this; f = @(w) [1,-0.1409*w^2;0,1]*[1,0;1/286.48,1]*[1,-0.05493*w^2;0,1]... *[1,0;1/1793...

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Issues in For loop
Have you intialised j (i.e. set j = 1;) before going into the for i = 1:38976 loop?

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How can I randomize cube positions in matlab?
Like this? E=1; N=3; Nsamples=10; d=randi(N,1,Nsamples); s=randi(2,1,Nsample...

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How can I add the percentage result on plotted figure ?
doc text

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how to I solve 2 eqns with 2 unknowns and plot 5 plots according to these solutions?
Here's a possible way. Only you will know if the results make sense deltaGrxn_std_rxn1 = -24800; %(J/mol) deltaHrxn_std_rxn1 ...

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Why do I get different results from the numerical solution and the analytical solution with ODE15S? The numerical solution looks smoother than the analytical one
% replace m_Soil = m_Soil_initial .* exp(- k1(i) .* t_measured(i+1)); % by m_Soil = m_Soil_initial .* exp(- k1(i) .* (t_mea...

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Why do I get different results from the numerical solution and the analytical solution with ODE15S? The numerical solution looks smoother than the analytical one
Much easier to follow! Your "analytical" solution is incorrect for "constants" that change with time. See the following %% Re...

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must return a column vector
Do you want something like this sp=-0.5:0.5:14.5; for i = 1:length(sp) [t,y(:,i)]=ode45(@(t,y) phy_ode_1(t,y,sp(i)),0:0.5:1...

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Finding a range of data greater than 0.1
There must be a neater way, but the following might help: X = [ 0.02 0.17 0.32 0.28 0.04 -0.07 -0.01 -0.19 -0.45 ....

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How to use ode45 with a time dependant second order differential equation
Turn your second order equation into two simultaneous first order equations.

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how can i solve this problem with rk4 method?
If m=20, k=20, c=40 then function f should be f = -(c/m)*v - k/m f=@(t,x,v) -2*v -x; %dvdt

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How to solve a function with different ranges
Try C_ox = [16;15;7.5;2;7.5;15;15]; C_ox(C_ox<=15)=C_ox(C_ox<=15)/15; C_ox(C_ox>15)=1

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how can i solve second order ODE with RK-4 without using a built in function in matlab?
This K11 = RK4(t(i), y1(:, i)); should be | K11 = RK4(t(i), y(:, i)); and this f12 = -3*y(1)+30*t+10; ...

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