Re: Problems with NSolve
- To: mathgroup at smc.vnet.net
- Subject: [mg88239] Re: Problems with NSolve
- From: Gopinath Venkatesan <gopinathv at ou.edu>
- Date: Tue, 29 Apr 2008 06:49:45 -0400 (EDT)
I had a similar problem sometime back. When I used NSolve to solve a set of simultaneous equations (after representing the differentials of the ODE/PDE in terms of function values - just like finite difference scheme), the NSolve took sufficiently longer time.
To my surprise, when I used Solve, I found a big difference in the solution time. Solve took me around 30 to 150 seconds (depending on my equations), while for the same set of equations NSolve took more than an hour or so to 'running out of memory' error message.
I also thought that setting precision level might help in the set up of NSolve (just like you did here), but did not help me.
I also guess (on the similar lines), DSolve could solve in less time than NDSolve in case of ODE/PDEs.
I wish Mathematica experts give us some good lecture on the use of Solve vs NSolve, DSolve and NDSolve. Thanks,
University of Oklahoma
Prev by Date:
Re: Re: Wolfram User Interface Research?
Next by Date:
Re: Does Mathematica really need more printed,
Previous by thread:
Re: Re: Re: Problems with NSolve
Next by thread:
financial chart with volumes