add violin plots

python manage.py violins --module combo,wcs,authentic --datemin 2018-01-01 --events redmine

eodb/events/management/commands/violins.py

@@ -0,0 +1,46 @@
+import matplotlib.pyplot as plt
+import numpy as np
+
+from .common import GraphCommand
+
+
+import random
+import numpy as np
+
+# Fixing random state for reproducibility
+np.random.seed(19680801)
+
+
+class Command(GraphCommand):
+
+    def handle(self, *args, **options):
+        datetime_var = 'author_datetime'
+        if options.get('committime'):
+            datetime_var = 'commit_datetime'
+
+        data = []
+        zones = []
+        for i, (legend, serie) in enumerate(self.get_series(options)):
+            zones.append(legend)
+            events = []
+            data.append(events)
+            for event in serie:
+                event_date = getattr(event, datetime_var)
+                hour = event_date.hour
+                if hour < 5:
+                    hour += 24
+                minute = event_date.minute
+                events.append(hour + minute / 60.0)
+
+        plt.figure()
+        ax = plt.subplot()
+
+        plt.violinplot(data, widths=0.7,
+                     showmeans=True, showextrema=True, showmedians=True)
+
+        ax.set_xticks(range(1, len(zones)+1))
+        ax.set_xticklabels(zones)
+        ax.set_yticks(range(5, 29))
+        ax.set_yticklabels(range(5, 24) + range(0, 5))
+
+        self.plot(options)