zack holden:
> I need to sort through a vector (x) and identify the point at which 2
> successive values become smaller than the previous value.
x <- c(5,5,7,6,5,4,3)
a=c(diff(x, 1) < 0, FALSE) & c(diff(x, 2) < 0, FALSE, FALSE)
a # FALSE FALSE TRUE TRUE TRUE FALSE FALSE
which(a) # 3 4 5
Does this give the answer that you want?
> x <- c(5,5,7,6,5,4,3)
> result <- NULL
> for (i in 1:(length(x) - 2)){
+ if ((x[i + 1] < x[i]) && (x[i + 2] < x[i])) result <- c(result, i)
+ }
> result
[1] 3 4 5
>
On 2/29/08, zack holden <[EMAIL PROTECTED]> wrote:
>
> Dear list,
> I'm trying to w
Dear list,
I'm trying to write my first looping function in R. After many hours of
searching help files and previous posts, I'm at wits end. Please forgive my
programming ignorance...any help is greatly appreciated.
I need to sort through a vector (x) and identify the point at which 2
success
3 matches
Mail list logo
