diff --git a/plog95.py b/plog95.py
index 2f0a54f..499cc14 100755
--- a/plog95.py
+++ b/plog95.py
@@ -10,13 +10,8 @@ import gzip
 import lzma
 
 def to_date(s):
-    dt=datetime.datetime.strptime(s,"%a %b %d %H:%M:%S %Z %Y")-datetime.datetime(1899,12,30)
-    return dt.days+(dt.seconds+dt.microseconds*1.0e-6)/86400.0
-
-def to_datetime(xd):
-    return datetime.datetime(1900,1,1)+datetime.timedelta(xd)
-
-
+    dt=datetime.datetime.strptime(s,"%a %b %d %H:%M:%S %Z %Y")
+    return dt
 
 
 b_or_p=sys.argv[1] # "b" or "p"
@@ -74,21 +69,19 @@ for t in t_l:
         iface_d[i]=None
 
 iface_l=iface_d.keys()
-#iface_l.sort()
-#print(iface_l)
 
-#print "T,",",".join(iface_l)
 prev={}
-for i in iface_l:
-    prev[i]=None
 t0=t_l[0]
-tn0=0
+for i in iface_l:
+    prev[i]=d[t0][i][b_or_p][txrx]
+tn0=t_l[0]
 mb_l=[]
 for t in t_l:
-    tn=int(86400.0*(t-t0)/300.0)
-    if tn<=tn0 and t!=t0: continue
-    tn0=tn
-    s="%f"%t
+    # print(t, " ", tn0, " ", tn0 + datetime.timedelta(minutes=5))
+    if (t < tn0 + datetime.timedelta(minutes=5)): continue
+    delta = (t - tn0).seconds
+    # if (delta > 450): print("xxxx ", tn0, " ", t, " ", delta)
+    tn0=t
     tot_mbit_s = 0.0;
     for i in iface_l:
         y=0
@@ -98,14 +91,12 @@ for t in t_l:
         if prev[i]!=None and x!=None:
             y=x-prev[i]
         if y<0.0: y=0
-        s+=",%d"%y
-        mbit_s=float(y)*8.0/300.0e6
-        #if mbit_s>600.0: print to_datetime(t),mbit_s
+        mbit_s=float(y)*8.0/(delta*1e6)
+        # if mbit_s>600.0: print(i, " ", t, " ", mbit_s)
         if mbit_s>10000.0: mbit_s=0.0
         tot_mbit_s += mbit_s;
-        prev[i]=x
+         prev[i]=x
     mb_l.append(tot_mbit_s)
-    #print(s)
 
 mb_l.sort()
 mb_n=len(mb_l)