seplyr has a neat new feature: the function
seplyr::expand_expr() which implements what we call “the string algebra” or string expression interpolation. The function takes an expression of mixed terms, including: variables referring to names, quoted strings, and general expression terms. It then “de-quotes” all of the variables referring to quoted strings and “dereferences” variables thought to be referring to names. The entire expression is then returned as a single string.
This provides a powerful way to easily work complicated expressions into the
seplyr data manipulation methods. Continue reading Neat New seplyr Feature: String Interpolation