-----Original Message-----
From: r-devel-bounces at r-project.org [mailto:r-devel-bounces at r-
project.org] On Behalf Of luethman at student.ethz.ch
Sent: Tuesday, August 04, 2009 8:25 AM
To: r-devel at stat.math.ethz.ch
Cc: R-bugs at r-project.org
Subject: [Rd] Accuracy (PR#13867)
=20
Full_Name: Manuel Luethi
Version: 2.9.1
OS: Windows XP
Submission from: (NULL) (129.132.128.136)
=20
=20
Hi
=20
I created the following vectors:
=20
p_1=3Dc(0.2,0.2,0.2,0.2,0.1,0.25,0.4,0.1,0.25,0.4,0.1,0.25,0.4,0.1,0.25,0
.4,0.2,0.5,0.8,0.2,0.5,0.8,0.2,0.5,0.8,0.2,0.5,0.8)
p_2=3Dc(0,0,0,0,0.5,0.5,0.5,0.5,0.5,0.5,0.5,0.5,0.5,0.5,0.5,0.5,0.4,0.25,
0.1,0.4,0.25,0.1,0.4,0.25,0.1,0.4,0.25,0.1)
=20
As these are probabilities, I calculated the remainder as
=20
p_3=3D1-p_1-p_2
=20
There the values which ought to be 0.1 were lateron not recognised by
p_3=3D=3D0.1,
but only if I used p_3 <=3D 0.1.
=20
The full calculation is actually bigger but the core issue remains: I
used
values input by hand, built a difference and it was wrong.
=20
I know that exactly the value 0.1 is one that can not be represented
using
binary rep. Maybe that's it, maybe not. Just wanted to let you know.
=20
With kind regards
=20
Manuel
=20