reviewr

Purpose and Overview

The reviewr package makes performing noisy checks of how your data has changed after implementing a dplyr function easy to implement and read. By simply adding the suffix _qc to the end of several core dplyr functions, you will get the exact same result as you would had you used the normal dplyr functions, but additional information about what just happened will automatically print. For example, using filter_qc instead of filter will filter the data exactly as filter will, but will also report how many (and what percent) of rows were dropped. This makes using reviewr easy and allows you to quickly toggle back and forth between regular dplyr functions and their reviewr counterparts. No wrappers around your code or any other set-up; just add _qc.

There are currently four sets of dplyr functions to which you can add _qc suffix and get a reviewr equivalent

• Filter. filter_qc, filter_all_qc, filter_at_qc, and filter_if_qc
• Mutate. mutate_qc, mutate_all_qc, mutate_at_qc, and mutate_if_qc. And transmute_qc, transmute_all_qc, transmute_at_qc, and transmute_if_qc
• Summarize. summarize_qc, summarize_all_qc, summarize_at_qc, and summarize_if_qc
• Joins. full_join_qc, inner_join_qc, left_join_qc, right_join_qc, semi_join_qc, and anti_join_qc

Although, some reviewr functions have additional options (especially for grouped data), all reviewr functions will work by simply using them as you would dplyr. This means you can start using them now: if you know how to use their dplyr versions, the reviewr functions will be implemented identically.

reviewr, therefore, allows you to get under the hood of data cleaning with dplyr. It does not attempt or intend to tell if you dplyr “worked”, but rather whether how you used the dplyr function(s) matched what you intended. (Does it make sense that you dropped 20 rows when performing the filter? Did you expect the join to not be a perfect 1-1 join? etc.)

Installing

Currently, reviewr lives only on github:

devtools::install_github("adamMaier/reviewr", build_opts = c("--no-resave-data", "--no-manual"))

Learning more

All reviewr functions have help documentation with examples. For the fullest description, see the vignette:

vignette("reviewr")