Fixes in message tree calculations, plots for the paper, started work on BW plots for the paper

bw_interop/bw_plots.py

@@ -0,0 +1,16 @@
+import matplotlib.pyplot as plt
+import numpy as np
+
+
+def dds_lat_msg_size_scatter(topic_name, topic_dds_latencies, topic_msg_sizes):
+    plt.close("dds_lat_msg_size_scatter")
+    fig, ax = plt.subplots(num="dds_lat_msg_size_scatter", dpi=300, figsize=(15, 7))
+    ax: plt.Axes
+    fig: plt.Figure
+    fig.suptitle(f"Correlation of Message Size and DDS Latency\nfor {topic_name}")
+
+    ax.scatter(np.array(topic_dds_latencies) * 1e6, topic_msg_sizes)
+    ax.set_xlabel("Message Size [B]")
+    ax.set_ylabel("DDS Latency [µs]")
+
+    return fig