ex_data_table_step.relop_set_indicator {rqdatatable}

Implement set_indicatoroperator.

Description

data.table based implementation.

Usage

## S3 method for class 'relop_set_indicator'
ex_data_table_step(
  optree,
  ...,
  tables = list(),
  source_usage = NULL,
  source_limit = NULL,
  env = parent.frame()
)

Arguments

optree

relop operations tree.

...

not used, force later arguments to bind by name.

tables

named list map from table names used in nodes to data.tables and data.frames.

source_usage

list mapping source table names to vectors of columns used.

source_limit

if not null limit all table sources to no more than this many rows (used for debugging).

env

environment to work in.

Examples

d <- data.frame(a = c("1", "2", "1", "3"),
                b = c("1", "1", "3", "2"),
                q = 1,
                stringsAsFactors = FALSE)
set <- c("1", "2")
op_tree <- local_td(d) %.>%
  set_indicator(., "one_two", "a", set) %.>%
  set_indicator(., "z", "a", c())
d %.>% op_tree