The hardware and bandwidth for this mirror is donated by METANET, the Webhosting and Full Service-Cloud Provider.
If you wish to report a bug, or if you are interested in having us mirror your free-software or open-source project, please feel free to contact us at mirror[@]metanet.ch.

digest: Compact hash representations of arbitrary R objects

ci License CRAN Dependencies Debian package r-universe Downloads (monthly) Downloads (total) CRAN use CRAN indirect BioConductor use Code Coverage Last Commit Documentation

Compact hash representations of arbitrary R objects

Overview

The digest package provides a principal function digest() for the creation of hash digests of arbitrary R objects (using the md5, sha-1, sha-256, crc32, xxhash, murmurhash, spookyhash, blake3, crc32c, xxh3_64, and xxh3_128 algorithms) permitting easy comparison of R language objects.

Extensive documentation is available at the package documentation site.

Examples

As R can serialize any object, we can run digest() on any object:

R> library(digest)
R> digest(trees)
[1] "12412cbfa6629c5c80029209b2717f08"
R> digest(lm(log(Height) ~ log(Girth), data=trees))
[1] "e25b62de327d079b3ccb98f3e96987b1"
R> digest(summary(lm(log(Height) ~ log(Girth), data=trees)))
[1] "86c8c979ee41a09006949e2ad95feb41"
R>

By using the hash sum, which is very likely to be unique, to identify an underlying object or calculation, one can easily implement caching strategies. This is a common use of the digest package.

Other Functions

A small number of additional functions is available:

Note

Please note that this package is not meant to be deployed for cryptographic purposes. More comprehensive and widely tested libraries such as OpenSSL should be used instead.

Installation

The package is on CRAN and can be installed via a standard

install.packages("digest")

Continued Testing

As we rely on the tinytest package, the already-installed package can also be verified via

tinytest::test_package("digest")

at any later point.

Author

Dirk Eddelbuettel, with contributions by Antoine Lucas, Jarek Tuszynski, Henrik Bengtsson, Simon Urbanek, Mario Frasca, Bryan Lewis, Murray Stokely, Hannes Muehleisen, Duncan Murdoch, Jim Hester, Wush Wu, Qiang Kou, Thierry Onkelinx, Michel Lang, Viliam Simko, Kurt Hornik, Radford Neal, Kendon Bell, Matthew de Queljoe, Ion Suruceanu, Bill Denney, Dirk Schumacher, Winston Chang, Dean Attali, and Michael Chirico.

License

GPL (>= 2)

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.