diff --git a/xray/id9.py b/xray/id9.py
index 7c90bef..6c94cb7 100644
--- a/xray/id9.py
+++ b/xray/id9.py
@@ -66,7 +66,7 @@ def findLogFile(folder):
   if len(files)>1: log.warn("Found more than one *.log file that is not diagnostics.log: %s"%files)
   return logfile
 
-def readLogFile(fnameOrFolder,subtractDark=False):
+def readLogFile(fnameOrFolder,subtractDark=False,skip_first=0,asDataStorage=True,last=None):
   """ read id9 style logfile """
   if os.path.isdir(fnameOrFolder):
     fname = findLogFile(fnameOrFolder)
@@ -88,6 +88,11 @@ def readLogFile(fnameOrFolder,subtractDark=False):
   if subtractDark:
     for diode in ['pd1ic','pd2ic','pd3ic','pd4ic']:
       if diode in darks: data[diode]=data[diode]-darks[diode]*data['timeic']
+  data = data[skip_first:last]
+  if asDataStorage:
+    # rstrip("_") is used to clean up last _ that appera for some reason in file_
+    data = storage.DataStorage( dict((name.rstrip("_"),data[name]) for name in data.dtype.names ) )
+  data.file = data.file.astype(str)
   return data