Given interval breaks points, returns data frame with information on
interval start time, interval end time, interval length and a factor
variable indicating the interval (left open intervals). If an object of class
ped is provided, extracts unique interval information from object.
int_info(x, ...)
# S3 method for default
int_info(x, min_time = 0L, ...)
# S3 method for data.frame
int_info(x, min_time = 0L, ...)
# S3 method for ped
int_info(x, ...)
# S3 method for pamm
int_info(x, ...)A numeric vector of cut points in which the follow-up should be
partitioned in or object of class ped.
Currently ignored.
Only intervals that have lower borders larger than this value will be included in the resulting data frame.
A data frame containing the start and end times of the
intervals specified by the x argument. Additionally, the interval
length, interval mid-point and a factor variable indicating the intervals.
as_ped ped_info
## create interval information from cut points
int_info(c(1, 2.3, 5))
#> tstart tend intlen intmid interval
#> 1 0.0 1.0 1.0 0.50 (0,1]
#> 2 1.0 2.3 1.3 1.65 (1,2.3]
#> 3 2.3 5.0 2.7 3.65 (2.3,5]
## extract interval information used to create ped object
tdf <- data.frame(time=c(1, 2.3, 5), status=c(0, 1, 0))
ped <- tdf %>% as_ped(Surv(time, status)~., id="id")
int_info(ped)
#> tstart tend intlen intmid interval
#> 1 0 2.3 2.3 1.15 (0,2.3]