sum                   package:base                   R Documentation

Sum of Vector Elements

Description:

     `sum' returns the sum of all the values present in its arguments.
     If `na.rm' is `FALSE' an `NA' value in any of the arguments will
     cause a value of `NA' to be returned, otherwise `NA' values are
     ignored.

Usage:

     sum(..., na.rm=FALSE)

Arguments:

     ...: numeric vectors.

   na.rm: logical. Should missing values be removed?

