laply is part of what package in R?

Question

laply for R is part of what package?

I get:

 \"Error: could not find function \"laply\"\".

Thanks.

Answer 1

laply is a function in Hadley's "plyr" package. The convention is that the first letter refers to the input class and the second letter refers to the output class so laply takes a list and returns an array.

install.packages("plyr")
require(plyr)
?laply

Edit: Now that the question has changed the answer is now the base package. (But if the error message was as posted it did imply a misspelling.)