warp_tbl: Given a data frame and two column names, this function...
In seankross/warppipe: Phylogenetic Annotation Pipeine for Biological Sequences

Given a data frame and two column names, this function returns a data frame where groupings of the first variable contain differences with respect to the second variable.

1	warp_tbl(tbl, grouping, warp_by)

`tbl`	A data frame with at least two columns
`grouping`	The column name specifying how to group the rows.
`warp_by`	The column name specifying the differences within groups to look for.

## Not run: 

fruit_prices <- data.frame(Fruit = c("Apple", "Apple", "Orange", "Orange", "Pear", "Pear"),
                           Price = c(1.2, 1.3, 1.1, 1.1, 1.4, 1.1))
warp_tbl(fruit_prices, "Fruit", "Price")
warp_tbl(fruit_prices, "Price", "Fruit")


## End(Not run)