The validate R-package makes it super-easy to check whether data lives up to expectations you have based on domain knowledge. It works by allowing you to define data validation rules independent of the code or data set. Next you can confront a dataset, or various versions thereof with the rules. Results can be summarized, plotted, and so on. Below is a simple example.
> library(validate)
> library(magrittr)
> iris %>% check_that(Sepal.Width < 0.5*Sepal.Length) %>% summary()
rule items passes fails nNA error warning expression
1 V1 150 79 71 0 FALSE FALSE Sepal.Width < 0.5 * Sepal.Length
To get started, please read our Introductory vignette.
With validate, data validation rules are treated as first-class citizens. This means you can import, export, annotate, investigate
and manipulate data validation rules in a meaninful way. See this vignette for rule import/export.
The latest release can be installed from the R command-line
install.packages("validate")
Beta versions of the package can be installed through our drat repository. If it is not yet installed on your system, first install Dirk Eddelbuettel's drat package.
install.packages("drat")
Next, install validate as follows.
drat::addRepo("data-cleaning")
install.packages("validate")
Note that the beta version can contain bugs and interfaces that may not be stable..