Explain prop (#14)

Fixes #12
hadley · Apr 14, 2017 · 5f01e41 · 5f01e41
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diff --git a/R/data.R b/R/data.R
@@ -5,7 +5,8 @@
 #'
 #' @format A data frame with five variables: \code{year}, \code{sex},
 #'   \code{name}, \code{n} and \code{prop} (\code{n} divided by total number
-#'   of applicants in that year).
+#'   of applicants in that year, which means proportions are of people of
+#'   that gender with that name born in that year).
 "babynames"
 
 #' Applicants.

diff --git a/man/babynames.Rd b/man/babynames.Rd