dbplyr (version 2.4.0)

fill.tbl_lazy: Fill in missing values with previous or next value

Description

Fill in missing values with previous or next value

Usage

# S3 method for tbl_lazy
fill(.data, ..., .direction = c("down", "up", "updown", "downup"))

Arguments

.data

A lazy data frame backed by a database query.

...

Columns to fill.

.direction

Direction in which to fill missing values. Currently either "down" (the default) or "up". Note that "up" does not work when .data is sorted by non-numeric columns. As a workaround revert the order yourself beforehand; for example replace arrange(x, desc(y)) by arrange(desc(x), y).

Examples

squirrels <- tibble::tribble(
  ~group,    ~name,     ~role,     ~n_squirrels, ~ n_squirrels2,
  1,      "Sam",    "Observer",   NA,                 1,
  1,     "Mara", "Scorekeeper",    8,                NA,
  1,    "Jesse",    "Observer",   NA,                NA,
  1,      "Tom",    "Observer",   NA,                 4,
  2,     "Mike",    "Observer",   NA,                NA,
  2,  "Rachael",    "Observer",   NA,                 6,
  2,  "Sydekea", "Scorekeeper",   14,                NA,
  2, "Gabriela",    "Observer",   NA,                NA,
  3,  "Derrick",    "Observer",   NA,                NA,
  3,     "Kara", "Scorekeeper",    9,                 10,
  3,    "Emily",    "Observer",   NA,                NA,
  3, "Danielle",    "Observer",   NA,                NA
)
squirrels$id <- 1:12

tbl_memdb(squirrels) %>%
  window_order(id) %>%
  tidyr::fill(
    n_squirrels,
    n_squirrels2,
  )