Quick References

Function Example Result
seq seq(1, 10, 1) 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
rep rep(1, 10) 1, 1, 1, 1, 1, 1, 1, 1, 1, 1

seq

Sequence Generation

Generate regular sequences. seq is a standard generic with a default method. seq.int is a primitive which can be much faster but has a few restrictions. seq_along and seq_len are very fast primitives for two common cases.

rep

Replicate Elements of Vectors and Lists

rep replicates the values in x. It is a generic function, and the (internal) default method is described here.

rep.int and rep_len are faster simplified versions for two common cases. They are not generic.