Re: definite integral

*To*: mathgroup at smc.vnet.net*Subject*: [mg49357] Re: definite integral*From*: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>*Date*: Fri, 16 Jul 2004 06:06:38 -0400 (EDT)*Organization*: Universitaet Leipzig*References*: <cd5ooi$b37$1@smc.vnet.net>*Reply-to*: kuska at informatik.uni-leipzig.de*Sender*: owner-wri-mathgroup at wolfram.com

Hi, call NDSolve it with the additional equation integralY'[t]==y[t], integralY[0]==0 and integralY[t] will return Integrate[y[tau],{tau,0,t}] Regards Jens Josh wrote: > > from the solution of a system of 2 differential equations > > sol=NDSolve[{v'[t]==10^3*i[t], > y'[t]== etc... > > I get the solution y[t] for t \in [0,1], and I can plot it with the command: > > Plot[Evaluate[y[t]/.sol],{t,0,0.5}, PlotRange->{-2,2}] > > but I have also to compute the definite integral of y[t], between 0 and > 0.1, how can I do? > > Thanks, Josh.