Re: Lower Floor
- To: mathgroup at smc.vnet.net
- Subject: [mg39042] Re: Lower Floor
- From: Bill Rowe <listuser at earthlink.net>
- Date: Sat, 25 Jan 2003 01:30:21 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
On 1/24/03 at 5:05 AM, giroux at dms.umontreal.ca (AndrÈ Giroux) wrote: >With Mathematica 4.1 on Windows98: >N[Log[8]/Log[2]] >3. >Floor[N[Log[8]/Log[2]]] >2 This occurs since the N[Log[8]/Log[2]] gives you a machine precision number that is slightly less than 3 With Mathematica 4.2 on a TiBook running MacOS 10.2.3 Sign[N[Log[8]/Log[2]] - 3] -1 A better way to express Log[8]/Log[2] would be Log[2,8] which gives an exact result of 3