diff --git a/analyse_udp.py b/analyse_udp.py
index 0f84bda..2e3b5b8 100755
--- a/analyse_udp.py
+++ b/analyse_udp.py
@@ -3,17 +3,19 @@ import os
 from argparse import ArgumentParser
 from datetime import datetime
 
-import matplotlib
 import pandas as pd
 import matplotlib.pyplot as plt
 
-matplotlib.use('TkAgg')
 
-
-def plot_packet_arrivals(csv_file):
-    direction = "uplink" if "uplink" in csv_file else "downlink"
+def plot_single_transmission(csv_file):
+    global direction
+    if direction is None:
+        direction = "uplink" if "uplink" in csv_file else "downlink"
     bitrate = csv_file.split("bitrate")[1].split("_")[0]
     transmission_df = pd.read_csv(csv_file)
+    if len(transmission_df) == 0:
+        print("Empty csv.")
+        return
     transmission_df["departure_time"] = transmission_df["departure_time"] - transmission_df["departure_time"].iloc[0]
     transmission_df["arrival_time"] = transmission_df["arrival_time"] - transmission_df["arrival_time"].iloc[0]
 
@@ -28,10 +30,6 @@ def plot_packet_arrivals(csv_file):
 
     print("Packetloss: {}%".format((len(lossed_packets.departure_time) / len(transmission_df.departure_time)) * 100 ))
 
-
-
-    #axes = transmission_df.plot(x="arrival_time", y="data.len_received_cum")
-
     fig, all_axes = plt.subplots(2, 1)
     fig.suptitle("CBR {} {}".format(bitrate, direction))
     fig.subplots_adjust(hspace=0.3)
@@ -41,7 +39,6 @@ def plot_packet_arrivals(csv_file):
     transmission_df.plot(ax=axes, x="departure_time", y="data.len_send_cum")
     transmission_df.plot(ax=axes, x="arrival_time", y="data.len_received_cum")
     lossed_packets.plot.scatter(ax=axes, x="departure_time", y="data.len_send_cum", color="y", marker="X")
-    #axes = transmission_df.boxplot(column="delay")
 
     axes.legend(["D(t)", "A(t)"])
     axes.set_ylabel("Byte")
@@ -49,15 +46,19 @@ def plot_packet_arrivals(csv_file):
 
     delay_axes = axes.twinx()
     delay_axes.set_ylabel("delay [s]")
+    delay_axes.set_ylim([0, 0.4])
     transmission_df.plot(ax=delay_axes, x="arrival_time", y="delay", color="g", linestyle="dotted")
 
     transmission_df.boxplot(ax=axes_boxplot, column="delay", vert=False)
     axes_boxplot.set_xlabel("[s]")
 
-    #fig = axes.get_figure()
-    #fig.suptitle("CBR {} {}".format(bitrate, direction))
-    #fig.show()
     fig.savefig(csv_file.replace(".csv", ".pdf"))
+    plt.close("all")
+
+    global all_delays_dict
+    if bitrate not in all_delays_dict:
+        all_delays_dict[bitrate] = list()
+    all_delays_dict[bitrate] += transmission_df["delay"].tolist()
 
 
 if __name__ == "__main__":
@@ -82,6 +83,8 @@ if __name__ == "__main__":
     args = parser.parse_args()
 
     csv_list = list()
+    all_delays_dict = dict()
+    direction = None
 
     if args.use_subdirs:
         sub_dirs = os.listdir(args.folder)
@@ -96,5 +99,29 @@ if __name__ == "__main__":
             if filename.endswith(".csv") and args.name_contains in filename:
                 csv_list.append(filename)
 
+    csv_list.sort()
     for csv in csv_list:
-        plot_packet_arrivals("{}/{}".format(args.folder, csv))
+        print(csv)
+        plot_single_transmission("{}/{}".format(args.folder, csv))
+
+    if len(all_delays_dict) > 0:
+        fig, axes = plt.subplots()
+        label_list = list()
+        unit = None
+        datas = list()
+        for bitrate, l in all_delays_dict.items():
+            if unit is None:
+                if "K" in bitrate:
+                    unit = "Kbit/s"
+                elif "M" in bitrate:
+                    unit = "Mbit/s"
+                else:
+                    unit = "Gbit/s"
+            label_list.append(bitrate.replace("K", "").replace("M", "").replace("G", ""))
+            datas.append(l)
+        axes.boxplot(datas)
+        #axes.set_xticklabels(label_list)
+        axes.set_xlabel("cbr bitrate [{}]".format(unit))
+        axes.set_ylabel("delay [s]")
+        fig.suptitle("CBR {}".format(direction))
+        fig.savefig("{}/all_delays_{}_boxplot.pdf".format(args.folder, direction))
\ No newline at end of file