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Robin


Active since 2011

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Question


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-...

13 years ago | 1 answer | 0

1

answer

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...

13 years ago | 0 answers | 0

0

answers

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''(...

13 years ago | 1 answer | 0

1

answer

Question


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=...

13 years ago | 1 answer | 0

1

answer

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...

13 years ago | 1 answer | 0

1

answer

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...

13 years ago | 2 answers | 0

2

answers

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) ...

13 years ago | 0 answers | 0

0

answers

Answered
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...

13 years ago | 0

| accepted

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...

13 years ago | 2 answers | 0

2

answers

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...

13 years ago | 2 answers | 0

2

answers