Re: NDSolve curve - obtain single value from curve at t:=d

*To*: mathgroup at smc.vnet.net*Subject*: [mg127682] Re: NDSolve curve - obtain single value from curve at t:=d*From*: "Kevin J. McCann" <kjm at KevinMcCann.com>*Date*: Wed, 15 Aug 2012 03:31:25 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-newout@smc.vnet.net*Delivered-to*: mathgroup-newsend@smc.vnet.net*References*: <k0d1ta$m0c$1@smc.vnet.net>

You did not give any of the constants, but this should get you started. d = age + remainingLife; age = 32.0; annuityAmt = 100000.0; startValue = 100000.0; fundRate = 0.05; eqn1 = y'[t] == fundRate/100*y[t] - annuityAmt; Y[t_] = y[t] /. NDSolve[{eqn1, y[age] == startValue}, y[t], {t, age, 110}][[1]] Plot[Y[t], {t, 32, 110}] Kevin On 8/14/2012 4:23 AM, design wrote: > Customized annuity applet; > I need to find the value of sol1 at t = d; > d, age, remaining life, fundrate, (and others) are all sliders; > Overall apples is working well > > d = age + remainingLife; > eqn1 = y'[t] == fundRate/100*y[t] - annuityAmt;=E2=80=A8sol1 = y[t]/. NDSolve[{eqn1, y[age] == startValue}, y[t], {t, age, 110}]; > > I have tried the sol1 iteration with {d,d,110} and many other approaches to no avail. > > Suggestions appreciated!! >