R: Read a JSON file

read_json_arrow {arrow}

R Documentation

Read a JSON file

Description

Usage

read_json_arrow(file, col_select = NULL, as_data_frame = TRUE, ...)

Arguments

`file`	A character file name or URI, `raw` vector, an Arrow input stream, or a `FileSystem` with path (`SubTreeFileSystem`). If a file name, a memory-mapped Arrow InputStream will be opened and closed when finished; compression will be detected from the file extension and handled automatically. If an input stream is provided, it will be left open.
`col_select`	A character vector of column names to keep, as in the "select" argument to `data.table::fread()`, or a tidy selection specification of columns, as used in `dplyr::select()`.
`as_data_frame`	Should the function return a `data.frame` (default) or an Arrow Table?
`...`	Additional options, passed to `json_table_reader()`

Value

A data.frame, or an Table if as_data_frame = FALSE.

Examples


  tf <- tempfile()
  on.exit(unlink(tf))
  writeLines('
    { "hello": 3.5, "world": false, "yo": "thing" }
    { "hello": 3.25, "world": null }
    { "hello": 0.0, "world": true, "yo": null }
  ', tf, useBytes=TRUE)
  df <- read_json_arrow(tf)

[Package arrow version 2.0.0 Index]