geberl · September 21, 2018 09:58 · Sep 21, 2018
diff --git a/radar_chart.py b/radar_chart.py
@@ -0,0 +1,80 @@
+#!/usr/bin/python
+
+"""
+Installation: Get the *Miniconda* Python Distribution - not the Python distrubution from python.org!
+- https://conda.io/miniconda.html
+
+Then install modules:
+- `cd ~/miniconda3/bin`
+- `./conda install numpy pandas matplotlib`
+
+Original source:
+- https://stackoverflow.com/questions/24659005/radar-chart-with-multiple-scales-on-multiple-axes
+- That code has problems with 5+ axes though
+"""
+
+import numpy as np
+import matplotlib.pyplot as plt
+
+# Optionally use different styles for the graph
+# Gallery: http://tonysyu.github.io/raw_content/matplotlib-style-gallery/gallery.html
+# import matplotlib
+# matplotlib.style.use('dark_background')  # interesting: 'bmh' / 'ggplot' / 'dark_background'
+
+
+class Radar(object):
+    def __init__(self, figure, title, labels, rect=None):
+        if rect is None:
+            rect = [0.05, 0.05, 0.9, 0.9]
+
+        self.n = len(title)
+        self.angles = np.arange(0, 360, 360.0/self.n)
+
+        self.axes = [figure.add_axes(rect, projection='polar', label='axes%d' % i) for i in range(self.n)]
+
+        self.ax = self.axes[0]
+        self.ax.set_thetagrids(self.angles, labels=title, fontsize=14)
+
+        for ax in self.axes[1:]:
+            ax.patch.set_visible(False)
+            ax.grid(False)
+            ax.xaxis.set_visible(False)
+
+        for ax, angle, label in zip(self.axes, self.angles, labels):
+            ax.set_rgrids(range(1, 6), angle=angle, labels=label)
+            ax.spines['polar'].set_visible(False)
+            ax.set_ylim(0, 5)
+
+    def plot(self, values, *args, **kw):
+        angle = np.deg2rad(np.r_[self.angles, self.angles[0]])
+        values = np.r_[values, values[0]]
+        self.ax.plot(angle, values, *args, **kw)
+
+
+if __name__ == '__main__':
+    fig = plt.figure(figsize=(8, 8))
+
+    tit = list('ABCDEFGHIJKJ')  # 12x
+
+    lab = [
+        list('abcde'),
+        list('12345'),
+        list('uvwxy'),
+        ['one', 'two', 'three', 'four', 'five'],
+        list('jklmn'),
+        list('jklmn'),
+        list('jklmn'),
+        list('jklmn'),
+        list('jklmn'),
+        list('jklmn'),
+        list('jklmn'),
+        list('jklmn')
+    ]
+
+    radar = Radar(fig, tit, lab)
+    radar.plot([1, 3, 2, 1, 3, 1, 1, 1, 1, 2, 3, 1],  '-', lw=2, color='b', alpha=0.4, label='first')
+    radar.plot([2, 2, 3, 3, 3, 2, 2, 2, 0, 2, 3, 2], '-', lw=2, color='r', alpha=0.4, label='second')
+    radar.plot([3, 4, 3, 1, 2, 2, 4, 3, 1, 2, 3, 3], '-', lw=2, color='g', alpha=0.4, label='third')
+    radar.ax.legend()
+
+    fig.savefig('result.png')
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