Risposto
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...

oltre 10 anni fa | 0

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Risposto
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 ...

oltre 10 anni fa | 0

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Risposto
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];...

oltre 10 anni fa | 0

Risposto
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 ...

oltre 10 anni fa | 0

Risposto
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...

oltre 10 anni fa | 0

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Risposto
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 ...

oltre 10 anni fa | 1

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Risposto
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...

oltre 10 anni fa | 0

Risposto
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,...

oltre 10 anni fa | 0

Risposto
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...

oltre 10 anni fa | 3

Risposto
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 ...

oltre 11 anni fa | 1

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Risposto
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(...

oltre 11 anni fa | 0

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Risposto
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)

oltre 11 anni fa | 3

Risposto
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...

oltre 11 anni fa | 0

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Risposto
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...

oltre 11 anni fa | 0

Risposto
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...

oltre 11 anni fa | 0

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

oltre 11 anni fa | 0

Risposto
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...

oltre 11 anni fa | 0

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Risposto
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

oltre 11 anni fa | 22

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

oltre 11 anni fa | 1

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Risposto
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]

oltre 11 anni fa | 0

Risposto
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...

oltre 11 anni fa | 0

Risposto
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...

oltre 11 anni fa | 0

Risposto
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...

oltre 11 anni fa | 0

Risposto
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...

oltre 11 anni fa | 1

Risposto
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,... ...

oltre 11 anni fa | 0

Risposto
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).*...

oltre 11 anni fa | 0

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Risposto
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...

oltre 11 anni fa | 0

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

oltre 11 anni fa | 0

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Risposto
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 ...

oltre 11 anni fa | 1

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Risposto
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)

oltre 11 anni fa | 0

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