From eec954b4544f7e0aed53f0990158d8fbaf2f6593 Mon Sep 17 00:00:00 2001
From: Reinhold Kainhofer <reinhold@kainhofer.com>
Date: Wed, 7 Sep 2016 15:04:00 +0000
Subject: [PATCH] Better explain age-shifting in the vignette
---
vignettes/using-the-mortalityTables-package.Rmd | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/vignettes/using-the-mortalityTables-package.Rmd b/vignettes/using-the-mortalityTables-package.Rmd
index aa6ed2b..3b3e9c7 100644
--- a/vignettes/using-the-mortalityTables-package.Rmd
+++ b/vignettes/using-the-mortalityTables-package.Rmd
@@ -316,6 +316,16 @@ same, unmodified base table for all cohorts. Basically, it works like this:
So, an age-shifted cohort life table just needs the base table and for each
birth year the amount the age is modified.
+For those people, who think visually, age shifting works on the death
+probabilities as following: A normal trend moves the $q_x$ curve downwards.
+Age-shifting approximates this by shifting the $q_x$ curve to the right without
+modifying its values.
+
+The following example clearly shows this, with the blue curve being the base
+table for YOB 2011. A full trend projection moves the curve down to the green line,
+while age-shifting moves the base curve to the right so that it coincides as
+much as possible with the exact (green) line.
+
```{r}
baseTableShift = getCohortTable(atPlus2, YOB=2011);
baseTableShift@name = "Base table of the shift (YOB 2011)"
--
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