Nothing
## -----------------------------------------------------------------------------
library("rqdatatable")
n <- 100000
set.seed(325235)
d <- data.frame(
x = sample(letters, n, replace = TRUE),
y = sample(letters, n, replace = TRUE),
z = sample(letters, n, replace = TRUE),
id = seq_len(n),
stringsAsFactors = FALSE)
grouping_vars <- qc(x, y, z)
sample_ops <- local_td(d) %.>%
extend_nse(., one := 1) %.>%
extend_nse(., ord := runif(sum(one))) %.>%
pick_top_k(.,
k = 5,
partitionby = grouping_vars,
orderby = "ord")
samp <- ex_data_table(sample_ops)
head(samp)
## -----------------------------------------------------------------------------
sample_ops <- local_td(d) %.>%
extend_nse(., ord := random()) %.>%
pick_top_k(.,
k = 5,
partitionby = grouping_vars,
orderby = "ord")
samp <- ex_data_table(sample_ops)
head(samp)
## -----------------------------------------------------------------------------
str(rqdatatable:::data_table_extend_fns)
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