[R] calculate differences - strange outcome

From: Kunzler, Andreas <a.kunzler_at_bzaek.de>
Date: Thu, 17 Jul 2008 11:47:42 +0200


Dear List,

I ran into some trouble by calculating differences. For me it is important that differences are either 0 or not.

So I don't understand the outcome of this calculation

865.56-(782.86+0+63.85+18.85+0)
[1] -1.136868e-13

I run R version 2.71 on WinXP

I could solve my problem by using
round()
but I would like to know the reason.
Maybe someone can help me?

Thanx



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