Re: definite integral

*To*: mathgroup at smc.vnet.net*Subject*: [mg49350] Re: definite integral*From*: BobHanlon at aol.com*Date*: Fri, 16 Jul 2004 06:06:32 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Clear[y]; y=y/.NDSolve[{y'[x]==y[x],y[1]==2},y,{x,0,3}][[1]]; Plot[y[t],{t,0,0.5},PlotRange->{-.1,1.5}]; Integrate[y[t], {t,0,0.1}] 0.0773804 Bob Hanlon > In a message dated Thu, 15 Jul 2004 11:11:14 +0000 (UTC), < > Josh at Killer.K> writes: 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?