From 19cc38b39ebcc449b927089c738453e6820b972e Mon Sep 17 00:00:00 2001
From: Marco Ratto <marco.ratto@jrc.ec.europa.eu>
Date: Tue, 14 Feb 2017 08:37:42 +0100
Subject: [PATCH] allow to start from quarterly growth rate variables

---
 matlab/utilities/dataset/quarterly2annual.m | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/matlab/utilities/dataset/quarterly2annual.m b/matlab/utilities/dataset/quarterly2annual.m
index 616b0cd51..cc655f1e0 100644
--- a/matlab/utilities/dataset/quarterly2annual.m
+++ b/matlab/utilities/dataset/quarterly2annual.m
@@ -16,6 +16,7 @@ function [ya, yass, gya, gyass] = quarterly2annual(y,yss,GYTREND0,type,islog,aux
 %          7 annual nominal from Q real and deflator
 % islog    0 level (default)
 %          1 log-level
+%          2 growth rate Q frequency
 % aux      optional input used when type>4
 % 
 %
@@ -67,7 +68,13 @@ if isstruct(aux),
 elseif type > 4,
     error('TYPE>4 requires auxiliary variable!')
 end
-if islog
+if islog == 2,
+    % construct loglevel out of growth rate
+    y = cumsum(y);
+    yss=0;
+    islog=1;
+end
+if islog == 1
     y=exp(y+yss);
     yss=exp(yss);
     y=y-yss;