Martin Morgan questions

Martin Morgan answers

• How does R base C code handle vectorization?
• Reassigning value in 3d array in R is very slow [duplicate]
• subclassing S4 class that contains a list with names: access by name
• R Checking for duplicates is painfully slow, even with mclapply
• Processing JSON using rjson
• import vs importFrom in NAMESPACE file [duplicate]
• Undocumented RCurl "progressfunction" with URL redirection
• R using apply on data frame to return order and values
• R: running out of memory, how to loop over rows?
• Closest subsequent index for a specified value