Community Profile # Alan Stevens

Last seen: Today 2020 이후 활성

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Runge-Kutta integration of the Taylor-Maccoll eq
Shouldn't k1 = h*F1(t, y1(i), y2(i)); m1 = h*F1(t, y1(i), y2(i)); k2 = h*F2(t+0.5*h, y1(i)+0.5*h, y2(i...

4일 전 | 0

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How can I shade the area between a curve and a vertical line?
Try help fill or help patch Although they refer to polygons, you could easily represent your curve as a multi-segment polyg...

12일 전 | 0

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Finding best parametric function estimation for ODE of first order
First plot the points, ui vs xi to see what sort of curve it might be. If it looks like it could be a polynomial (as in the cas...

13일 전 | 1

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Impose a numerical limit on the value of a sum of two vectors
One possibility is min(max(a1),a1+a2)

14일 전 | 1

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How read Matrix Market data into MATLAB?
Do you mean like this: %%MatrixMarket matrix coordinate real symmetric % System: M x_dotdot + E x_dot + K x = B u % y...

15일 전 | 0

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rounding the imaginary part of the number
Z = 0.0000e+00 + 7.8765e-04*1i; format shortG round(Z,4)

15일 전 | 1

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How can I model second order ODE with matrices and external forcing?
Like this perhaps (I've made up arbitrary data; you will obviously have to replace it with your own) x0 = [1; -1]; v0 = [0; 0]...

15일 전 | 0

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Randomisation of ramberg osgood equation
You don't need a loop. Yu can just do deltaepsilon = r/E + 2*(r/(2*Kp)).^(1/np); where Kp = K' and np = n'. Note that you nee...

18일 전 | 0

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How to solve a ode within a for loop?
Like this A = 0:0.05:0.35; tspan = 0: 0.1: 1; p32 = zeros(length(tspan),length(A)); r = 0.7; r0 = 2; p0 = [r; r0]; for k ...

20일 전 | 0

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How can I solve a system of equations with exponential terms in Matlab?
There is almost certainly no analytical solution here! For a numerical solution (given the values of the other parameters), try...

21일 전 | 0

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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));

24일 전 | 0

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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...

25일 전 | 0

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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....

25일 전 | 0

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

26일 전 | 0

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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...

26일 전 | 0

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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.

26일 전 | 0

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Plotting to test probability convergence

27일 전 | 0

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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...

27일 전 | 0

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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...

28일 전 | 0

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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...

28일 전 | 0

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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 ...

29일 전 | 0

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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...

약 1달 전 | 1

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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...

약 1달 전 | 0

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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...

약 1달 전 | 0

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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...

약 1달 전 | 0

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

약 1달 전 | 0

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How to save all variables in for loop

약 1달 전 | 0

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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...

약 1달 전 | 0

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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?

약 1달 전 | 0

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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...

약 1달 전 | 0

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