Beantwortet
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...

fast 10 Jahre vor | 0

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Beantwortet
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 ...

fast 10 Jahre vor | 0

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Beantwortet
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];...

fast 10 Jahre vor | 0

Beantwortet
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 ...

etwa 10 Jahre vor | 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...

etwa 10 Jahre vor | 0

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Beantwortet
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 ...

etwa 10 Jahre vor | 1

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Beantwortet
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...

etwa 10 Jahre vor | 0

Beantwortet
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,...

etwa 10 Jahre vor | 0

Beantwortet
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...

mehr als 10 Jahre vor | 3

Beantwortet
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 ...

etwa 11 Jahre vor | 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(...

etwa 11 Jahre vor | 0

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Beantwortet
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)

etwa 11 Jahre vor | 3

Beantwortet
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...

etwa 11 Jahre vor | 0

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Beantwortet
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...

etwa 11 Jahre vor | 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...

etwa 11 Jahre vor | 0

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

etwa 11 Jahre vor | 0

Beantwortet
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...

etwa 11 Jahre vor | 0

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Beantwortet
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

etwa 11 Jahre vor | 22

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

etwa 11 Jahre vor | 1

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Beantwortet
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]

etwa 11 Jahre vor | 0

Beantwortet
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...

etwa 11 Jahre vor | 0

Beantwortet
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...

etwa 11 Jahre vor | 0

Beantwortet
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...

etwa 11 Jahre vor | 0

Beantwortet
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...

etwa 11 Jahre vor | 1

Beantwortet
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,... ...

etwa 11 Jahre vor | 0

Beantwortet
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).*...

etwa 11 Jahre vor | 0

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Beantwortet
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...

etwa 11 Jahre vor | 0

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

etwa 11 Jahre vor | 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 ...

etwa 11 Jahre vor | 1

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Beantwortet
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)

etwa 11 Jahre vor | 0

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