Use string as filter in dplyr?

Question

Is there a way to use a string variable as the filter argument in dplyr? For example:

filter(iris,Sepal.Length > 6)

would be replaced with

string <- 'Sepal.Length > 6'
filter(iris,string)

Basically, I am looking for the entire filter string to be a variable as I am creating the filter string pragmatically. Thanks for any help.

Answer 1

If you want to filter with a string argument, you'll need to use filter_() instead of filter()

string <- 'Sepal.Length > 6'
filter_(iris, string)

Also note that it's recommended to use the *_() functions when programming.