Re: LessSame
- To: mathgroup at smc.vnet.net
- Subject: [mg70307] Re: LessSame
- From: "Chris Chiasson" <chris at chiasson.name>
- Date: Thu, 12 Oct 2006 05:37:38 -0400 (EDT)
- References: <acbec1a40610111851u633c0d25vf611318569a3d1f8@mail.gmail.com>
So, setting $EqualTolerance to zero did solve my problem. However, I have some questions. What exactly is this tolerance? Where they say there can be x number of digits difference in the binary representation of the number, I don't really know what they mean. When I want to know if two numbers are "the same" to a certain (additive) accuracy and precision, I use a comparison like this: Abs[num2-num1]<10^(-acc)+Abs[num1]*10^-(prec) How does that relate to the above "tolerance"? On 10/11/06, Chris Chiasson <chris at chiasson.name> wrote: > I think > > -0.9999999999999919`<=-1.` > > giving True is toasting a numerical algorithm I'm trying to write. > > What I need is LessSame or something > > What's the best way to proceed? > > Block $EqualTolerance? > > > -- > http://chris.chiasson.name/ > -- http://chris.chiasson.name/