Re: Re: Problem with Mathematica driving me nuts
- To: mathgroup at smc.vnet.net
- Subject: [mg46842] Re: [mg46837] Re: Problem with Mathematica driving me nuts
- From: tasande at MIT.EDU
- Date: Wed, 10 Mar 2004 04:57:41 -0500 (EST)
- References: <c2he1m$ahd$1@smc.vnet.net> <200403100057.TAA09500@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
When I try this:
In[90]:=
FindRoot[x^2==4x-4,{x,1}]
FindRoot[x^2==4x-4,{x,1},AccuracyGoal->30,WorkingPrecision->30]
N[%,15]
Out[90]=
{x -> 2.}
Out[91]=
{x - >1.99999999999999644728632119950}
Out[92]=
{x->2.00000000000000}
The default is rounded to 2. In general, always specify three options to
instruct FindRoot of your desired level of "accuracy":
1. AccuracyGoal
2. Working Precision
3. Number of decimal places
Theodore Sande
Disclaimer: The author's opinions expressed herein are not necessarily his own.
- References:
- Re: Problem with Mathematica driving me nuts
- From: lalu_bhatt@yahoo.com (Bhuvanesh)
- Re: Problem with Mathematica driving me nuts