From 65c0e3a8dd06b0381aa88c0c01473ca004faad2c Mon Sep 17 00:00:00 2001
From: joshday <emailjoshday@gmail.com>
Date: Tue, 21 Apr 2020 12:35:31 -0400
Subject: [PATCH] docstring

---
 src/stats.jl | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/stats.jl b/src/stats.jl
index be9d933..5603a63 100644
--- a/src/stats.jl
+++ b/src/stats.jl
@@ -59,6 +59,16 @@ Base.values(o::CountMap) = values(o.value)
 Base.getindex(o::CountMap, i) = o.value[i]
 
 #-----------------------------------------------------------------------------# CountMissing
+"""
+    CountMissing(stat)
+
+Calculate a `stat` along with the count of `missing` values.  
+
+# Example 
+
+    o = CountMissing(Mean())
+    fit!(o, [1, missing, 3])
+"""
 mutable struct CountMissing{T, O<:OnlineStat{T}} <: OnlineStat{Union{Missing,T}}
     stat::O
     nmissing::Int