Question

I have two vectors with different length in R and I can combine these two vectors. I want to find vector values which belongs to each interval:

x = c(1, 2, 3.5, 4, 6, 7.5, 8, 9, 10, 11.5, 12) 
y = c(2.5, 6.5) 

w = sort(c(x, y))

I want to find the vector values x which less than 2.5 and the vector values x belong to interval (2.5, 6.5) and the vector value x bigger than 6.5?

Actually the value of vector y change in each iteration of my algorithm, for eaxample maybe I have vector y with length=4 so how can I find the vector value belongs to each interval in each iteration?

Answer 1

Try:

> split(x, findInterval(x, y))
$`0`
[1] 1 2

$`1`
[1] 3.5 4.0 6.0

$`2`
[1]  7.5  8.0  9.0 10.0 11.5 12.0

Here’s what happens when we change y

> y = c(2.5, 6.5, 10.5)
> split(x, findInterval(x, y))
$`0`
[1] 1 2

$`1`
[1] 3.5 4.0 6.0

$`2`
[1]  7.5  8.0  9.0 10.0

$`3`
[1] 11.5 12.0