From 06ae0a12ea9ba09675af3fc1dc19a8a80047c071 Mon Sep 17 00:00:00 2001
From: Andreas Suter <andreas.suter@psi.ch>
Date: Thu, 18 Oct 2018 13:54:05 +0200
Subject: [PATCH] fixed start != t0 phase issue

---
 src/classes/PFourier.cpp | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/classes/PFourier.cpp b/src/classes/PFourier.cpp
index 2178f97f..4c088017 100644
--- a/src/classes/PFourier.cpp
+++ b/src/classes/PFourier.cpp
@@ -312,7 +312,7 @@ PFourier::PFourier(TH1F *data, Int_t unitTag, Double_t startTime, Double_t endTi
 
   // if endTime == 0 set it to the last time slot
   if (fEndTime == 0.0) {
-    Int_t last = fData->GetNbinsX();
+    Int_t last = fData->GetNbinsX()-1;
     fEndTime = fData->GetBinCenter(last);
   }
 
@@ -901,21 +901,21 @@ void PFourier::PrepareFFTwInputData(UInt_t apodizationTag)
 
   // 2nd fill fIn
   if (fUseFFTW) {
-    for (UInt_t i=0; i<fNoOfData-t0bin; i++) {
-      fIn[i][0] = fData->GetBinContent(i+t0bin) - mean;
+    for (UInt_t i=0; i<fNoOfData-start; i++) {
+      fIn[i][0] = fData->GetBinContent(i+start) - mean;
       fIn[i][1] = 0.0;
     }
-    for (UInt_t i=fNoOfData-t0bin; i<fNoOfBins; i++) {
+    for (UInt_t i=fNoOfData-start; i<fNoOfBins; i++) {
       fIn[i][0] = 0.0;
       fIn[i][1] = 0.0;
     }
   } else {
-    for (UInt_t i=0; i<fNoOfData-t0bin; i++) {
+    for (UInt_t i=0; i<fNoOfData-start; i++) {
 #ifdef HAVE_DKS
-      fInDKS[i] = fData->GetBinContent(i+t0bin) - mean;
+      fInDKS[i] = fData->GetBinContent(i+start) - mean;
 #endif
     }
-    for (UInt_t i=fNoOfData-t0bin; i<fNoOfBins; i++) {
+    for (UInt_t i=fNoOfData-start; i<fNoOfBins; i++) {
 #ifdef HAVE_DKS
       fInDKS[i] = 0.0;
 #endif