This package provides an easy way to refine data table. For example, you want to apply complex formulas such as (yen.dollar + dollar.yen) / (yen.exchange.rate) to data table? Maintaining those formulas can be hard, and oftenly maintained in Excel sheet, not R code. The package aims to solve this difficulty, and you can refine any data table with a formula table.
You can install this package from github with
r devtools::install_github("zedoul/refnr")
You can refine a data table as follows:
```r head(iris)
#> Sepal.Length Sepal.Width Petal.Length Petal.Width Species #> 1 5.1 3.5 1.4 0.2 setosa #> 2 4.9 3.0 1.4 0.2 setosa #> 3 4.7 3.2 1.3 0.2 setosa #> 4 4.6 3.1 1.5 0.2 setosa #> 5 5.0 3.6 1.4 0.2 setosa #> 6 5.4 3.9 1.7 0.4 setosa
library(refnr) formulas <- rbind(c(Name = "Length", Formula = "Sepal.Length + Petal.Length"), c(Name = "Width", Formula = "Sepal.Width + Petal.Width")) res <- refnr(iris, formulas) head(res)
#> Length Width #> 1 6.5 3.7 #> 2 6.3 3.2 #> 3 6.0 3.4 #> 4 6.1 3.3 #> 5 6.4 3.8 #> 6 7.1 4.3 ```