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Accessing ODE solver solutions in between the time steps

6 vues (au cours des 30 derniers jours)
Saurav Kumar
Saurav Kumar le 17 Mai 2016
How can I access the solution of the odesolver in between the time steps before it returns the full solution. For ex: The function definition is :
function yf = odefunc(t,x_i)
yf(1,1) = x_i*exp(-t);
end
When I type
[t,y]=ode45('odefunc',[0 5],-3)
in the command window, it returns me two vectors t and y of size say (45 x 1). I want to access the solution of the odesolver that is say 5 values of each ('t' and 'y') inside the function before the odesolver spits out the entire solution.

Réponses (2)

Steven Lord
Steven Lord le 17 Mai 2016
Are you trying to use the values from previous time steps to calculate the solution at the current time step? If so, take a look at the delay differential equation solvers in MATLAB like dde23 or ddesd.

Walter Roberson
Walter Roberson le 17 Mai 2016
You cannot do that with the ode* functions.

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