> -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of maiya > Sent: Thursday, March 10, 2011 7:19 AM > To: r-help@r-project.org > Subject: [R] identical values not so identical? newbie help please! > > Hi there! > I'm not sure I can create a minimal example of my problem, so I'm > linking to > a minimal .RData file that has only two objects: obs and exp, each is a > 6x9 > matrix. http://dl.dropbox.com/u/10364753/test.RData link to dropbox > file > (I hope this is acceptable mailing list etiquette!) > > Here's what happens: > > obs[1, 1] > [1] 118 > > exp[1, 1] > [1] 118 > > obs[1, 1]-exp[1, 1] > [1] 2.842171e-14 > > Problem is, both obs and exp should be identical. They are the result > of a > saturated loglinear model, and I've run the same code across about 400 > tables, all of which result in sum(obs-exp)=0, except for this one. I > can't > figure it out? > > Anyway, I need help understanding why 118 and 118 are not really the > same. I > appreciate some may be wary of downloading my .Rdata file (I'm on > ubuntu if > that's any consolation), but I don't know how else to ask this > quesiton! > > Thanks! > > Maja Z. >
See the R FAQ 7.31 Dan Daniel J. Nordlund Washington State Department of Social and Health Services Planning, Performance, and Accountability Research and Data Analysis Division Olympia, WA 98504-5204 ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.