NEWS

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hdd 0.1.2 (2026-08-03)

Bug fixes

• fix major bug in [.hdd preventing this function to be used in nested environments

Improvements

• changing the default for the argument replace: it becomes TRUE in all functions using it (previously it was FALSE)

• argument newfile becomes destDir, retro compatibility is ensured

• in argument destDir, the parent and grand-parent directories are now automatically created if they are missing

• add progress bar to txt2hdd and hdd_slice

Other changes

• use data.table as imports and not as depends

• rewrite of the documentation

• improve arguments checking

hdd 0.1.1 (2023-08-25)

User visible changes

• txt2hdd: argument path now accepts vectors and even patterns. All files matching the pattern will be imported to the hdd format.
• txt2hdd: gains the arguments encoding and locale.
• txt2hdd: messages are more informative, in particular import time is reported.

Minor bug fixes

• Fixed a small bug in the function guess_col_types when the data contained dates.

Other

• update the maintainer's email address

hdd 0.1.0 (2019-11-06)

First version

• This package is an effort to provide a simple way to deal with out of memory data sets within R. The tasks \pkg{hdd} does is to import and perfom simple manipulations: like subsetting, creating new variables, etc.
• As in other data base management systems (DBMS), the data is split into several chunks that fit in memory, and operations are performed "chunk-wise". These operations are hidden to the user.
• Why creating this package? First, it avoids having to switch to alternative software like DBMS to deal with out of memory data sets (you can also use DBMS in R but it is cumbersome). Second, it allows the user to use the full power of R to create complex new variables. Finally, and maybe most importantly, the syntax is very simple and requires little effort from the user.