Find of primitive function using ODE45??

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ReneHBK
ReneHBK 2015-9-21
回答： Walter Roberson 2015-9-21
Hello: I've a question... If I have a vector's know and I want calculate your primitive function used ODE45, for example: I know: a=[......] and a vector of time : t=[......] but, I need know v from the differential equation dv/dt = a(t); When I built the code using ODE45, but I get an error. Could they a help me for do the code??

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Walter Roberson
Walter Roberson 2015-9-21
I am having difficulty understanding your situation. Do you have a formula, or do you have a bunch of times and measurements of the derivative at the times? If that is the case then you should be using trapz() or cumtrapz().
I do not know what a "primitive function" is in this context? You cannot get a symbolic formula out of ode45.

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