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, ...)

Arguments

x

A numeric vector of cut points in which the follow-up should be partitioned in or object of class ped.

...

Currently ignored.

min_time

Only intervals that have lower borders larger than this value will be included in the resulting data frame.

Value

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.

See also

as_ped ped_info

Examples

## 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]