From 8357e455f9a7a93508936d6465e4bc4dd8a5ee63 Mon Sep 17 00:00:00 2001 From: hadley Date: Thu, 28 Jul 2016 15:40:34 -0500 Subject: [PATCH] Fix koan Fixes #204 --- tidy.Rmd | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tidy.Rmd b/tidy.Rmd index fafbd20..f436d17 100644 --- a/tidy.Rmd +++ b/tidy.Rmd @@ -354,7 +354,7 @@ There are two missing values in this dataset: * The return for the first quarter of 2016 is implicitly missing, because it simply does not appear in the dataset. -One way to think about the difference is with this Zen-like koan: An implicit missing value is the presence of an absence; an explicit missing value is the absence of a presence. +One way to think about the difference is with this Zen-like koan: An explicit missing value is the presence of an absence; an implicit missing value is the absence of a presence. The way that a dataset is represented can make implicit values explicit. For example, we can make the implicit missing value explicit putting years in the columns: