Improve dithering

Author: G1OJS

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "wsjt_all"
-version = "1.6.0"
+version = "1.7.0"
 license = "MIT"
 license-files = ["LICENSE"]
 

src/wsjt_all/plotter_dual.py

@@ -16,8 +16,8 @@ def plot_counts(ax, calls, decodes_A, decodes_B):
         decode_counts_A.append(sum(c == da['oc'] for da in decodes_A))  
         decode_counts_B.append(sum(c == db['oc'] for db in decodes_B))
         cols.append(hash_color(c, plt.cm.tab20))
-    xplot = dither(decode_counts_A, 0.01)
-    yplot = dither(decode_counts_B, 0.01)
+    xplot = dither(decode_counts_A, 0.03)
+    yplot = dither(decode_counts_B, 0.03)
     ax.scatter(xplot, yplot, c = cols , marker ="o", alpha = 0.9)
     ax.axline((0, 0), slope=1, color="black", linestyle=(0, (5, 5)))
     axmax = max(ax.get_xlim()[1], ax.get_ylim()[1])

src/wsjt_all/utils.py

@@ -16,4 +16,4 @@ def save_chart(plt, plotfile, subfolder, session_info, use_bandmode_folders):
 
 def dither(vals, amplitude_factor):
     amplitude = amplitude_factor * (max(vals) - min(vals))
-    return [v + amplitude*random.random()  for v in vals]
+    return [v + amplitude*random.random() if (v>0) else 0 for v in vals]