From 1d2737ea2c11b4a7c533c2eedc6f198a3c4d6f7a Mon Sep 17 00:00:00 2001
From: nat-salt <nat@nat-salt.com>
Date: Wed, 6 Apr 2022 18:02:49 +0100
Subject: [PATCH 1/2] updates example plot_pca_3d.py to notebook style

---
 examples/decomposition/plot_pca_3d.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/examples/decomposition/plot_pca_3d.py b/examples/decomposition/plot_pca_3d.py
index c693cfcfa78f3..4516b27b5cb99 100644
--- a/examples/decomposition/plot_pca_3d.py
+++ b/examples/decomposition/plot_pca_3d.py
@@ -22,8 +22,9 @@
 from scipy import stats
 
 
-# #############################################################################
+# %%
 # Create the data
+# -----------------------------------
 
 e = np.exp(1)
 np.random.seed(4)
@@ -51,8 +52,10 @@ def pdf(x):
 b /= norm
 
 
-# #############################################################################
+# %%
 # Plot the figures
+# -----------------------------------
+
 def plot_figs(fig_num, elev, azim):
     fig = plt.figure(fig_num, figsize=(4, 3))
     plt.clf()

From daffd42d96df5f25a735312ed03a1f91c37b1a18 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lo=C3=AFc=20Est=C3=A8ve?= <loic.esteve@ymail.com>
Date: Fri, 8 Apr 2022 15:58:02 +0200
Subject: [PATCH 2/2] Tweaks

---
 examples/decomposition/plot_pca_3d.py | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/examples/decomposition/plot_pca_3d.py b/examples/decomposition/plot_pca_3d.py
index 4516b27b5cb99..e539af6d66b7a 100644
--- a/examples/decomposition/plot_pca_3d.py
+++ b/examples/decomposition/plot_pca_3d.py
@@ -15,16 +15,13 @@
 #          Kevin Hughes
 # License: BSD 3 clause
 
-from sklearn.decomposition import PCA
+# %%
+# Create the data
+# ---------------
 
 import numpy as np
-import matplotlib.pyplot as plt
-from scipy import stats
-
 
-# %%
-# Create the data
-# -----------------------------------
+from scipy import stats
 
 e = np.exp(1)
 np.random.seed(4)
@@ -54,7 +51,15 @@ def pdf(x):
 
 # %%
 # Plot the figures
-# -----------------------------------
+# ----------------
+
+from sklearn.decomposition import PCA
+
+import matplotlib.pyplot as plt
+
+# unused but required import for doing 3d projections with matplotlib < 3.2
+import mpl_toolkits.mplot3d  # noqa: F401
+
 
 def plot_figs(fig_num, elev, azim):
     fig = plt.figure(fig_num, figsize=(4, 3))