R filtering out a subset

Question

I have a data.frame A and a data.frame B which contains a subset of A

How can I create a data.frame C which is data.frame A with data.frame B excluded? Thanks for your h

Answer 1

If this B data set is truly a nested version of the first data set there has to be indexing that created this data set to begin with. IMHO we shouldn't be discussing the differences between the data sets but negating the original indexing that created the B data set to begin with. Here's an example of what I mean:

A <- mtcars
B <- mtcars[mtcars$cyl==6, ]
C <- mtcars[mtcars$cyl!=6, ]