dendextend (version 1.13.4)

na_locf: Last Observation Carried Forward

Description

A function for replacing each NA with the most recent non-NA prior to it.

Usage

na_locf(x, first_na_value = 0, recursive = TRUE, ...)

Arguments

x

some vector

first_na_value

If the first observation is NA, fill it with "first_na_value"

recursive

logical (TRUE). Should na_locf be re-run until all NA values are filled?

...

ignored.

Value

The original vector, but with all the missing values filled by the value before them.

See Also

na.locf

Examples

# NOT RUN {
na_locf(c(NA, NA))
na_locf(c(1, NA))
na_locf(c(1, NA, NA, NA))
na_locf(c(1, NA, NA, NA, 2, 2, NA, 3, NA, 4))
na_locf(c(1, NA, NA, NA, 2, 2, NA, 3, NA, 4), recursive = FALSE)
# }
# NOT RUN {
library(microbenchmark)
library(zoo)

microbenchmark(
  na_locf = na_locf(c(1, NA, NA, NA, 2, 2, NA, 3, NA, 4)),
  na.locf = na.locf(c(1, NA, NA, NA, 2, 2, NA, 3, NA, 4))
) # my implementation is 6 times faster :)

microbenchmark(
  na_locf = na_locf(rep(c(1, NA, NA, NA, 2, 2, NA, 3, NA, 4), 1000)),
  na.locf = na.locf(rep(c(1, NA, NA, NA, 2, 2, NA, 3, NA, 4), 1000))
) # my implementation is 3 times faster
# }
# NOT RUN {
# }