[R] behavior of seq_along

[Dieter Menne]

Dale Steele wrote:
> 
> 
> x <- 1:5; sum(x)
> y <- 6:10; sum(y)
> 
> data <- c(x,y)
> S <- sum( data[seq_along(x)] )
> S
> T <- sum( data[seq_along(y)] )
> T
> 
> 

If in doubt, divide and conquer:

seq_along(x)
[1] 1 2 3 4 5
> seq_along(y)
[1] 1 2 3 4 5

You expected  that the second vector is 6,7...
Dieter

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