From b3ca205b27de01f792f89cb515da4f1af0d39df2 Mon Sep 17 00:00:00 2001
From: Houtan Bastani <houtan@dynare.org>
Date: Mon, 13 Jan 2014 16:19:24 -0500
Subject: [PATCH] doc: dates subtraction has two functionalities (cherry picked
from commit 54a0039c6468cbedd5d2eb449519b8ee40c6ec04)
---
doc/dynare.texi | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/doc/dynare.texi b/doc/dynare.texi
index c30a8edca..f39421dfe 100644
--- a/doc/dynare.texi
+++ b/doc/dynare.texi
@@ -8541,7 +8541,11 @@ Increments a date by one period. @code{+1950Q1} is identical to @code{1950Q2}, @
@item minus binary operator (@code{-})
-The difference between two dates is a number of periods. For instance if @code{1951Q2-1950Q1} is equal to @code{5} (quarters).
+Has two functions: difference and subtraction. If the second argument
+is a date, calculates the difference between the first date and the
+second date (@i{e.g.} @code{1951Q2-1950Q1} is equal to @code{5}). If
+the second argument is an integer @code{X}, subtracts @code{X} periods
+from the date (@i{e.g.} @code{1951Q2-2} is equal to @code{1950Q4}).
@item minus unary operator (@code{-})
--
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