From: martin sikora <martin.sikora_at_upf.edu>

Date: Fri 26 Jan 2007 - 16:05:01 GMT

R-help@stat.math.ethz.ch 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. Received on Sat Jan 27 03:23:38 2007

Date: Fri 26 Jan 2007 - 16:05:01 GMT

hello,

today while trying to extract data from a list for subsequent analysis, i stumbled upon this funny behavior on my system:

[1] 0.1

*> x[1]
*

[1] 0.1

**[1] FALSE
**

> x[1]>1-x[2]

**[1] TRUE
**

> x<-c(0.3,0.7)

*> x[1]
*

[1] 0.3

*> x[2]
*

[1] 0.7

[1] 0.3

**[1] FALSE
**
but:

*> x[1]
*

[1] 0.4

*> x[2]
*

[1] 0.6

[1] 0.4

**[1] TRUE
**
any ideas why this might be? in my data i have values that are calculated
like above, e.g.

y=x if x<=0.5, else y=1-x

now because of that behaviour whenever i want to get values e.g. <0.1 from my data, i will also get all values of y=0.1 that came from the subtraction.

i'm using R 2.4.0 on windows XP; this is my sessionInfo():

> sessionInfo()

R version 2.4.0 (2006-10-03)

i386-pc-mingw32

locale:

LC_COLLATE=Spanish_Spain.1252;LC_CTYPE=Spanish_Spain.1252;LC_MONETARY=Spanis h_Spain.1252;LC_NUMERIC=C;LC_TIME=Spanish_Spain.1252

attached base packages:

[1] "methods" "stats" "graphics" "grDevices" "utils" "datasets" "base"

*>
*

thanks a lot

martin

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