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Differential Equation: Not getting result

• To: mathgroup at smc.vnet.net
• Subject: [mg127329] Differential Equation: Not getting result
• From: Rahul Chakraborty <rahul.6sept at gmail.com>
• Date: Tue, 17 Jul 2012 01:31:45 -0400 (EDT)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com
• Delivered-to: mathgroup-newout@smc.vnet.net
• Delivered-to: mathgroup-newsend@smc.vnet.net

Dear all,

 For the following code i'm not getting result. kindly tell me where i'm making mistake.

Clear[x];
r=1;
K=1;
eqn= (x^')[t]-r  x[t]  (1-x[t]/K)==0//Simplify;
sol=NDSolve[{eqn,x[0]==1/2,x'[0]==0},x[t],{t,0,50}][[1]]
ParametricPlot[Evaluate[{x[t]/.sol,D[x[t]/.sol,t]}],{t,0,50},Frame->True,AxesLabel->{"x",Overscript[x,"."]},AspectRatio->1]
ParametricPlot[Evaluate[{t,x[t]/.sol}],{t,0,50},Frame->True,AxesLabel->{"t","x"},AspectRatio->1]


Regards,
rc

• Follow-Ups:
  • Re: Differential Equation: Not getting result
    • From: Bob Hanlon <hanlonr357@gmail.com>
  • Re: Differential Equation: Not getting result
    • From: Oliver Ruebenkoenig <ruebenko@wolfram.com>
  • Re: Differential Equation: Not getting result
    • From: Murray Eisenberg <murray@math.umass.edu>