Check to see if a value is within a range?

Question

I have a dataset in a data.table format that looks as such:

ID     time.s     time.e
1       1         2
2       1         4
3       2         3         


        

Answer 1

Just adding to the tools that could be used to this, another being data.table::between:

data.frame <- data.frame(ID = 1:4,
                         time.s = c(1,1,2,2),
                         time.e = c(2,4,3,4))

data.table::between(1, data.frame$time.s, data.frame$time.e)

Answer 2

Also, this works:

with(dat, time.s <= 1 & time.e >= 1)

Answer 3

Here's a dplyr option in case anybody stumbles on this question:

library(dplyr)
value = 1
df %>% 
  mutate(ok = value >= time.s & value <= time.e)

  ID time.s time.e    ok
1  1      1      2  TRUE
2  2      1      4  TRUE
3  3      2      3 FALSE
4  4      2      4 FALSE

Answer 4

Here's another one.

library(TeachingDemos)
a[time.s %<=% 1 %<=% time.e]

It's probably overkill to load a library for that, but the syntax is quite intuitive.

Answer 5

Assuming that the values of ID are unique:

DT[, list(OK = 1 %in% seq(time.s, time.e)), by = ID]

giving;

   ID    OK
1:  1  TRUE
2:  2  TRUE
3:  3 FALSE
4:  4 FALSE