From: rpreghen <rpreghen@f7af4fe6-9843-0410-8265-dc069ae4e863>
Date: Wed, 17 Jun 2009 14:51:01 +0000 (+0000)
Subject: added macros to merge QA histos and added merged QA histo set
X-Git-Url: http://git.uio.no/git/?a=commitdiff_plain;h=f5731d663d827cfd680b217cfc4bc9dffdefe6c6;p=u%2Fmrichter%2FAliRoot.git

added macros to merge QA histos and added merged QA histo set
---

diff --git a/TOF/MergeQAHistos.C b/TOF/MergeQAHistos.C
new file mode 100644
index 00000000000..b9f25c6490c
--- /dev/null
+++ b/TOF/MergeQAHistos.C
@@ -0,0 +1,45 @@
+/*
+ * this macros connects to ALIEN and searches for TOFQA.root
+ * files in the provided search dir. the files are merged in
+ * a single local TOFQA.root file.
+ * the output file can be used both to check QA histos merged 
+ * over more files and to use them to provide reference QA
+ * histos merged over more runs (the starting reference histos
+ * will be histo from MC production/reconstruction process).
+ */
+
+MergeQAHistos(const Char_t *searchDir = "/alice/sim/PDC_09/LHC09a4/80050", Int_t maxFiles = kMaxInt)
+{
+
+  const Char_t *fileName = "TOFQA.root";
+
+  TGrid *gGrid = TGrid::Connect("alien");
+  if (!gGrid || !gGrid->IsConnected()) {
+    AliError("cannot connect to ALIEN");
+    return;
+  }
+  
+  TGridResult *gr = gGrid->Query(searchDir, fileName);
+  if (gr->GetEntries() < 1) {
+    printf("less than one input files: abort\n");
+    return;
+  }
+  printf("%d files found\n", gr->GetEntries());
+  
+  TFileMerger merger;
+  merger.OutputFile(fileName);
+  
+  Int_t mergedFiles = 0;
+  Int_t nFiles = gr->GetEntries();
+  for (Int_t i = 0; i < nFiles && i < maxFiles; i++) {
+    
+    if (merger.AddFile(gr->GetKey(i, "turl")))
+      mergedFiles++;
+
+  }
+
+  merger.Merge();
+  printf("merged %d files\n", mergedFiles);
+  printf("output written on %s\n", fileName);
+}
+
diff --git a/TOF/data/TOFQA.LHC09a4.80050.root b/TOF/data/TOFQA.LHC09a4.80050.root
new file mode 100644
index 00000000000..89a84227d2f
Binary files /dev/null and b/TOF/data/TOFQA.LHC09a4.80050.root differ