Fast approximation — fast.approx • mets

Fast approximation

fast.approx(
  time,
  new.time,
  equal = FALSE,
  type = c("nearest", "right", "left"),
  sorted = FALSE,
  ...
)

Arguments

time: Original ordered time points
new.time: New time points
equal: If TRUE a list is returned with additional element
type: Type of matching, nearest index, nearest greater than or equal (right), number of elements smaller than y otherwise the closest value above new.time is returned.
sorted: Set to true if new.time is already sorted
...: Optional additional arguments

Author

Klaus K. Holst

Examples

id <- c(1,1,2,2,7,7,10,10)
fast.approx(unique(id),id)
#> [1] 1 1 2 2 3 3 4 4

t <- 0:6
n <- c(-1,0,0.1,0.9,1,1.1,1.2,6,6.5)
fast.approx(t,n,type="left")
#> [1] 0 1 1 1 2 2 2 7 7