Respondida
solving differential equation for diffrent intial condition
Samee, check out this <https://www.mathworks.com/matlabcentral/answers/118837-how-to-add-trajectory-into-a-phase-plane#answer_12...

más de 9 años hace | 0

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flight simulation using 3d animation
Ahmed, based on your screen shot it looks like you have not assigned unique names to the objects in your VR. As an example, one ...

más de 9 años hace | 0

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Using ODE, several errors with a spring system and function
Julia, use function myODE() e = 0.0:.2:1.0; % no brackets, the colons are used to define the vector t = [1 20];...

más de 9 años hace | 0

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ode45 with a function that change with time
Nashira, one approach is to use two different ode functions. Use the first one to integrate over the time interval |[0,tp]| and ...

más de 9 años hace | 0

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ode45 is not outputting solutions for each increment specified by my “time-span” vector
zek3r, use [tsol,ysol] % returns vectors/matrices instead of [outputs] % returns structure as the output ar...

más de 9 años hace | 0

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Solve the chain rule in lagrange equation
Siti, the Euler-Lagrange tool package on <http://www.mathworks.com/matlabcentral/fileexchange/49796-euler-lagrange-tool-package ...

casi 10 años hace | 1

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How to plot the trajectories of the equilibrium points
Raja, you are probably best off to solving differential equations of the system for different initial conditions (and the plot t...

casi 10 años hace | 0

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How do I fix the "index exceeds matrix dimensions error?
Cassidy, it is the placement of the state vector in the function call to |ode45| and the function [t,X] = ode45(@DE,t,...

casi 10 años hace | 0

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How can I solve symbolic Lagrange equations of motion numerically?
Hi Alexander, check out the <http://www.mathworks.com/matlabcentral/fileexchange/49796-euler-lagrange-tool-package Euler-Lagrang...

casi 10 años hace | 3

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Removing the string from cell array
Gopalakrishnan, use e.g. |strrep| a = {'fdf_faf' ; 'dfaf_dfa' ; 'dfadf_dfaf'; 'dfaf_fdaf';'daf_dfaf';'dfaf_fff'}; arep ...

más de 10 años hace | 1

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Select specific coefficient from symbolic polynomial
Farid, you can back out the subexpressions and the corresponding coefficients of the polynomial using |coeffs| syms x y z P(...

más de 10 años hace | 0

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How can I tell if the parallel computing toolbox installed?
J, use the |ver| command. You should see something like Parallel Computing Toolbox Version 6.6 (R2015a)

más de 10 años hace | 3

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can be 2 different figures can be plotted and seen ?
Sure. E.g. figure plot(x,y) figure plot(n,p) Alternatively, use |subplot| subplot(2,1,1) plot(x,y) subplo...

más de 10 años hace | 0

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plot for different values
Lincy, you mean probably something like x = 4:4:20; p = [0.3; 0.4; 0.8]; y = bsxfun(@rdivide, x, p); plot(x,y) Give...

más de 10 años hace | 0

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why does the year function not work as specified in documentation?
Edmund, you probably do not have access to the <http://www.mathworks.com/help/finance/functionlist.html Financial Toolbox>. Chec...

más de 10 años hace | 0

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vpasolve does not handle inequalities correctly
Jesse, according to the documentation " |vpasolve| ignores assumptions set on variables. You can restrict the returned result...

más de 10 años hace | 0

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Nested if statement not perusing all if statements
Justin, almost there... for i = 1:100 if matrixA(i,2) < 0 matrixB(i,1) = i/a*i elseif matrixA(i,1...

más de 10 años hace | 0

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keeping track of the original indices of an array after sorting
Md, simply use [B,I] = sort(A,'ascend') B = 1 2 3 4 5 I = 3 4 5 2 1

más de 10 años hace | 22

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how to solve equations ?
Symbolically, syms x solve(sin(x) - 0.5 == 0,x) ans = pi/6 (5*pi)/6 Numerically, myfun = @(x) sin(...

más de 10 años hace | 1

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Selecting non-zero elements from a symbolic vector
Farid, you could use syms a b c d = [a*b, 0 , a^2*b*c, 1, 0]; d(d==0) = [] d = [ a*b, a^2*b*c, 1]

más de 10 años hace | 0

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Sym and Syms matlab 2014b MAC doesn't exist
Pedro, you probably do not have access to the Symbolic Math Toolbox. Check out this <http://www.mathworks.com/matlabcentral/answ...

más de 10 años hace | 0

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Changing file name in Matlab
Tanmoyee, use the |strrep| command str = 'wflux_23.25_86.75'; str_new = strrep(str, 'wflux', 'data') str_new = dat...

más de 10 años hace | 0

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Error with FOR loop and SQRT: In an assignment A(I) = B, the number of elements in B and I must be the same.
Michael, in for i=1:N c(i)=c*sqrt(1-(y(i)/(b/2))^2) end |c| is a vector of varying size (growing), which you a...

más de 10 años hace | 0

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I want to loop by giving the C stops at a value less than 0.0001.
Angkhana, almost there. A = input('Enter A: '); B = input('Enter B: '); func = @(x) exp(x)-2*cos(x); err = 1e-4...

más de 10 años hace | 1

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How can i solve this using MATLAB ?
Bello, if you have access to the Symbolic Math Toolbox: syms F1 F2 F3 sol = solve([2==0.04*F1+0.54*F2+0.26*F3,... ...

más de 10 años hace | 0

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How to plot these function plesa help
Joe, you could use [x1,x2] = meshgrid(0:0.5:10,0:0.5:10); f = (4 - 2.1*x1.^2 + x1.^4/3).*x1.^2 + x1.*x2 + (-4 + 4*x2.^2).*...

más de 10 años hace | 0

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correction for loop in bisection method
Anupan, check out A = input('Enter A: '); B = input('Enter B: '); func = @(x) exp(x)-2*cos(x); % use instead anonym...

más de 10 años hace | 0

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How to write correct matlab codes in solving equation?
Anupan, use syms x solve(x+2 == 1,x)

más de 10 años hace | 0

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How to merge two D arrays according a given order?
Aditya, how about ID1 = [id1' id1_coords]; ID2 = [id2' id2_coords]; ID = sortrows([ID1; ID2]) ID = 1 26 ...

más de 10 años hace | 1

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Trying to plot radioactive decay equation
Daniel, you can simply do lambda = log10(2)/5700; x = 1:100; y = (-1/lambda)*log10(x/100); plot(x,y)

más de 10 años hace | 0

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