merge.disk.frame: Merge function for disk.frames

In xiaodaigh/disk.frame: Larger-than-RAM Disk-Based Data Manipulation Framework

Merge function for disk.frames

Description

Merge function for disk.frames

Usage

## S3 method for class 'disk.frame'
merge(
  x,
  y,
  by,
  outdir = tempfile(fileext = ".df"),
  ...,
  merge_by_chunk_id = FALSE,
  overwrite = FALSE
)

Arguments

x	a disk.frame
y	a disk.frame or data.frame
by	the merge by keys
outdir	The output directory for the disk.frame
...	passed to merge and cmap.disk.frame
merge_by_chunk_id	if TRUE then only chunks in df1 and df2 with the same chunk id will get merged
overwrite	overwrite the outdir or not

Examples

b = as.disk.frame(data.frame(a = 51:150, b = 1:100))
d = as.disk.frame(data.frame(a = 151:250, b = 1:100))
bd.df = merge(b, d, by = "b", merge_by_chunk_id = TRUE)

# clean up cars.df
delete(b)
delete(d)
delete(bd.df)

xiaodaigh/disk.frame documentation built on Feb. 3, 2023, 10:04 p.m.