qd_read: qd_read

In qs2: Efficient Serialization of R Objects

qd_read

Description

Reads an object that was saved to disk in the qdata format.

Usage

qd_read(file,
         use_alt_rep = qopt("use_alt_rep"),
         validate_checksum = qopt("validate_checksum"),
         nthreads = qopt("nthreads"))

Arguments

file	The file name/path.
use_alt_rep	Use ALTREP when reading in string data (the initial value is FALSE).
validate_checksum	Whether to validate the stored checksum in the file (the initial value is FALSE).
nthreads	The number of threads to use when reading data (the initial value is 1L).

Value

The object stored in file.

Examples

x <- data.frame(int = sample(1e3, replace=TRUE),
         num = rnorm(1e3),
         char = sample(state.name, 1e3, replace=TRUE),
         stringsAsFactors = FALSE)
myfile <- tempfile()
qd_save(x, myfile)
x2 <- qd_read(myfile)
identical(x, x2) # returns TRUE

qs2 documentation built on April 4, 2025, 3:28 a.m.