Uniform axes-box geometry across result figures; panel tags below panels

rev2/plot_rev2.py

@@ -50,11 +50,15 @@ C = {"ofdma": "#546E7A", "blind": "#8D6E63", "noma": "#E65100",
      "aux": "#6A1B9A"}
 
 # ---------------------------------------------------------------- fig_fair --
+# axes box kept at 2.59 x 2.12 in; panel tags "(a)"/"(b)" BELOW the panels
 d = json.load(open(DATA / "e1_fair_baselines.json"))
 snr = d["snr"]
-f = plt.figure(figsize=(7.1, 2.75))
-axs = [f.add_axes([0.115, 0.165, 0.365, 0.77]),
-       f.add_axes([0.615, 0.165, 0.365, 0.77])]
+FH = 3.10                                   # taller canvas for below-axis tags
+AXH = 2.12 / FH
+AXB = 0.86 / FH
+f = plt.figure(figsize=(7.1, FH))
+axs = [f.add_axes([0.115, AXB, 0.365, AXH]),
+       f.add_axes([0.615, AXB, 0.365, AXH])]
 for ax, sc, ttl in zip(axs, ["HIGH", "MIX"], ["(a) HIGH", "(b) MIX"]):
     v = d["scenarios"][sc]
     ax.semilogy(snr, v["ofdma"]["ser"], "s--", color=C["ofdma"], label="OFDMA")
@@ -66,8 +70,9 @@ for ax, sc, ttl in zip(axs, ["HIGH", "MIX"], ["(a) HIGH", "(b) MIX"]):
                 label="LMMSE-genie")
     ax.set_xlabel("SNR (dB)")
     ax.set_ylabel("SER")
-    ax.set_title(ttl)
     ax.set_xlim(0, 20)
+    ax.text(0.5, -0.31, ttl, transform=ax.transAxes,
+            ha="center", va="top", fontsize=10)
 axs[1].legend(loc="lower left", framealpha=0.9, fontsize=7)
 save(f, "fig_fair.pdf", axs)