Interpolating function
- To: mathgroup at smc.vnet.net
- Subject: [mg49158] Interpolating function
- From: mathma18 at hotmail.com ("G.L.Narasimham")
- Date: Mon, 5 Jul 2004 04:54:53 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
ODE=0==y''[t]+(1-y[t])/y'[t];
NDSolve[{ODE,y[1]==1,y'[1]==1},y,{t,-2,3}];
y2[u_] = y[u] /. First[%];
yd = Dt[y2[t],{t,1}]; ydd = Dt[y2[t],{t,2}];
Plot[ {y2[t],y3[t],yd,ydd},{t, -2, 3 }];
" Is it not possible to directly access
y'[t]and y''[t] plots without Dt? "