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Robin


Actif depuis 2011

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How do you set up a boundary value problem?
I posted this question a couple days ago, but I recieved no response: http://www.mathworks.com/matlabcentral/answers/13321-i-...

presque 13 ans il y a | 1 réponse | 0

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Question


I am having a lot of trouble solving this boundary value problem?
So Basically here is the problem: I was given a second order function that models longitudinal displacements in a longitudinal...

presque 13 ans il y a | 1 réponse | 0

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Question


I need help solving this second order differential equation?
I was given a second order function that models longitudinal displacements in a longitudinally loaded elastic bar. a(x)*u''(...

presque 13 ans il y a | 1 réponse | 0

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réponse

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I cannot find the index of a specific element in an array?
I have an array of non-repeating elements, X. I need to find the index of a specific element, 1.5 in X. I am trying to do index=...

presque 13 ans il y a | 1 réponse | 0

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Question


Index of a matrix?
I have two column matricies x and y (neither of them have repeating numbers). I want to search for a number in matrix x, get th...

presque 13 ans il y a | 1 réponse | 0

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Question


Initial conditions on ODE45 ?
Im trying to solve this IVP: e^y +(t*e^y - sin(y))*(dy/dt)=0 with the initial condition y(2)=1.5. I was just not sure how to...

presque 13 ans il y a | 2 réponses | 0

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Question


Matlab plotting direction field, stable or unstable?
I'm trying to figure out which equilibrium solutions are stable and unstable for this differnetial equation (Gompertz model) ...

presque 13 ans il y a | 1 réponse | 0

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Réponse apportée
I'm trying to plot this contour graph, but it just does not work?
I am not sure why matlab was not able to solve for this equation, however if you try to solve for it symbolically using Dt, inst...

presque 13 ans il y a | 0

| A accepté

Question


I'm trying to plot this contour graph, but it just does not work?
I tried to solve this differential equation: e^y+(t*e^y - sin(y))*(dy/dt)=0 using the symbolic solver dsolve, I inputed this a...

presque 13 ans il y a | 2 réponses | 0

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Question


I'm trying to use dsolve to solve this differential equation, but it does not work
I'm trying to solve this differential equation using dsolve in matlab, so this is what Im trying to run: eqn = 'Dy=-exp(y)/(t...

presque 13 ans il y a | 2 réponses | 0

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