[R] Unexpected behavior from which.max (or possibly max)

[Mario Valle]

If I enclose x$i+x$window in parentheses it works:
>> check.max<- function(x){obs.max<- which.max(x$elev[x$i:(x$i+x$window)]);
> obs.max}

x$elev[x$i:x$i+x$window] means:
x$elev[(x$i:x$i)+x$window]

Simple.
		mario

>> check.max(test)
> [1] 11
>
>
> What am I missing?
>
> Here is sessionInfo (I know I need to upgrade; I am behind the state's
> McAfee firewall thingy which makes it very difficult for me):
>
>> sessionInfo()
> R version 2.11.1 (2010-05-31)
> x86_64-pc-linux-gnu
>
> locale:
>   [1] LC_CTYPE=en_US.utf8       LC_NUMERIC=C
>   [3] LC_TIME=en_US.utf8        LC_COLLATE=en_US.utf8
>   [5] LC_MONETARY=C             LC_MESSAGES=en_US.utf8
>   [7] LC_PAPER=en_US.utf8       LC_NAME=C
>   [9] LC_ADDRESS=C              LC_TELEPHONE=C
> [11] LC_MEASUREMENT=en_US.utf8 LC_IDENTIFICATION=C
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base
>
> loaded via a namespace (and not attached):
> [1] tools_2.11.1
>
> Thanks, Jason
>
> 	[[alternative HTML version deleted]]
>
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-- 
Ing. Mario Valle
Data Analysis and Visualization Group            | http://www.cscs.ch/~mvalle
Swiss National Supercomputing Centre (CSCS)      | Tel:  +41 (91) 610.82.60
v. Cantonale Galleria 2, 6928 Manno, Switzerland | Fax:  +41 (91) 610.82.82