Sum in an ode45?

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Peter 2011년 12월 11일

I have the following differnetial equation

dy(1) = a*y(1)/N

where N is the sum of all the Y(i) at a given moment of time, not just at the beginning. How can I input this into ode45?

Jan 2011년 12월 11일

What are "all Y(i)"?

Walter Roberson 2011년 12월 11일

What does y(1) indicate in this context? Evaluation at y = 1 ? The first of set of subscripted variables?

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