[R] Difference

[Dimitris Rizopoulos]

Look at "?Comparison", especially in the "Note" section:

...

For numerical values, remember == and != do not allow for the finite 
representation of fractions, nor for rounding error. Using all.equal 
with identical is almost always preferable. See the examples.

...

Best,
Dimitris

----
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/16/336899
Fax: +32/16/337015
Web: http://www.med.kuleuven.ac.be/biostat/
     http://www.student.kuleuven.ac.be/~m0390867/dimitris.htm



----- Original Message ----- 
From: "Ralf Strobl" <rstrobl at ibe.med.uni-muenchen.de>
To: <r-help at stat.math.ethz.ch>
Sent: Tuesday, April 19, 2005 10:19 AM
Subject: [R] Difference


> Dear List,
> can anyone explain me this result (Windows XP, R 2.0.1):
>
> > (0.2-0.1)==0.1
> [1] TRUE
> > (0.3-0.2)==0.1
> [1] FALSE
>
> Regards,
> Ralf Strobl
>
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