Merge pull request #8199 from stas-sl/patch-1

BUG: fix variable overwriting in radviz

Author: Tom Augspurger

doc/source/v0.15.0.txt

@@ -920,3 +920,4 @@ Bug Fixes
 - Bug in plotting methods modifying the global matplotlib rcParams (:issue:`8242`).
 - Bug in ``DataFrame.__setitem__`` that caused errors when setting a dataframe column to a sparse array (:issue:`8131`)
 - Bug where ``Dataframe.boxplot()`` failed when entire column was empty (:issue:`8181`).
+- Bug with messed variables in ``radviz`` visualization (:issue:`8199`).

pandas/tools/plotting.py

@@ -405,10 +405,10 @@ def normalize(series):
     for kls in classes:
         to_plot[kls] = [[], []]
 
-    n = len(frame.columns) - 1
+    m = len(frame.columns) - 1
     s = np.array([(np.cos(t), np.sin(t))
-                  for t in [2.0 * np.pi * (i / float(n))
-                            for i in range(n)]])
+                  for t in [2.0 * np.pi * (i / float(m))
+                            for i in range(m)]])
 
     for i in range(n):
         row = df.iloc[i].values