From 935a82b433ef93b65901e3f569a79fb5bca8f785 Mon Sep 17 00:00:00 2001
From: andrzejnovak <novak5andrzej@gmail.com>
Date: Fri, 9 Aug 2019 22:55:27 +0200
Subject: [PATCH 1/8] Add step option where='edges'

---
 lib/matplotlib/axes/_axes.py | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
index 44467581f446..ed1f2c27acb4 100644
--- a/lib/matplotlib/axes/_axes.py
+++ b/lib/matplotlib/axes/_axes.py
@@ -2079,7 +2079,7 @@ def step(self, x, y, *args, where='pre', data=None, **kwargs):
             An object with labelled data. If given, provide the label names to
             plot in *x* and *y*.
 
-        where : {'pre', 'post', 'mid'}, optional, default 'pre'
+        where : {'pre', 'post', 'mid', 'edges'}, optional, default 'pre'
             Define where the steps should be placed:
 
             - 'pre': The y value is continued constantly to the left from
@@ -2089,6 +2089,8 @@ def step(self, x, y, *args, where='pre', data=None, **kwargs):
               every *x* position, i.e. the interval ``[x[i], x[i+1])`` has the
               value ``y[i]``.
             - 'mid': Steps occur half-way between the *x* positions.
+            - 'edges': Expects dim(x) = dim(y) + 1, steps have y[i] value on
+              the interval ``[x[i], x[i+1])``
 
         Returns
         -------
@@ -2104,7 +2106,17 @@ def step(self, x, y, *args, where='pre', data=None, **kwargs):
         -----
         .. [notes section required to get data note injection right]
         """
-        cbook._check_in_list(('pre', 'post', 'mid'), where=where)
+        cbook._check_in_list(('pre', 'post', 'mid', 'edges'), where=where)
+        if where == 'edges':
+            if x.shape[0] != y.shape[0] + 1:
+                raise ValueError(f"When drawing with 'edges', x must have "
+                                 f"first dimension greater then y by exactly "
+                                 f"1, but x, y have shapes {x.shape} and"
+                                 f"{y.shape}")
+            else:
+                y = np.r_[y, y[-1]]
+                where = 'post'
+
         kwargs['drawstyle'] = 'steps-' + where
         return self.plot(x, y, *args, data=data, **kwargs)
 

From a6ff7562592d26c1038672700224ec4cdc295171 Mon Sep 17 00:00:00 2001
From: andrzejnovak <novak5andrzej@gmail.com>
Date: Mon, 12 Aug 2019 12:19:21 +0200
Subject: [PATCH 2/8] Add 'between' and 'edges'

---
 lib/matplotlib/axes/_axes.py | 27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)

diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
index ed1f2c27acb4..31f88d62c004 100644
--- a/lib/matplotlib/axes/_axes.py
+++ b/lib/matplotlib/axes/_axes.py
@@ -2089,8 +2089,10 @@ def step(self, x, y, *args, where='pre', data=None, **kwargs):
               every *x* position, i.e. the interval ``[x[i], x[i+1])`` has the
               value ``y[i]``.
             - 'mid': Steps occur half-way between the *x* positions.
-            - 'edges': Expects dim(x) = dim(y) + 1, steps have y[i] value on
+            - 'between': Expects len(x) = len(y) + 1, steps have y[i] value on
               the interval ``[x[i], x[i+1])``
+            - 'edges': Expects len(x) = len(y) + 1, steps have y[i] value on
+              the interval ``[x[i], x[i+1]), shape is closed at x[0], x[-1]``
 
         Returns
         -------
@@ -2106,16 +2108,23 @@ def step(self, x, y, *args, where='pre', data=None, **kwargs):
         -----
         .. [notes section required to get data note injection right]
         """
-        cbook._check_in_list(('pre', 'post', 'mid', 'edges'), where=where)
-        if where == 'edges':
+        cbook._check_in_list(('pre', 'post', 'mid', 'edges', 'between'), where=where)
+        if where == 'between' or where == 'edges':
             if x.shape[0] != y.shape[0] + 1:
-                raise ValueError(f"When drawing with 'edges', x must have "
-                                 f"first dimension greater then y by exactly "
-                                 f"1, but x, y have shapes {x.shape} and"
+                raise ValueError(f"When drawing with 'edges' or 'between', "
+                                 f"x must have first dimension greater "
+                                 f"then y by exactly 1, but x, y "
+                                 f"have shapes {x.shape} and "
                                  f"{y.shape}")
-            else:
-                y = np.r_[y, y[-1]]
-                where = 'post'
+
+            if where == 'edges':
+                l_edgex, l_edgey = [x[0], x[0]], [0, y[0]]
+                r_edgex, r_edgey = [x[-1], x[-1]], [0, y[-1]]
+                self.add_line(mlines.Line2D(l_edgex, l_edgey))
+                self.add_line(mlines.Line2D(r_edgex, r_edgey))
+
+            y = np.r_[y, y[-1]]
+            where = 'post'
 
         kwargs['drawstyle'] = 'steps-' + where
         return self.plot(x, y, *args, data=data, **kwargs)

From e6383a54111f5c77b2197b450f174d3f208c5279 Mon Sep 17 00:00:00 2001
From: andrzejnovak <novak5andrzej@gmail.com>
Date: Tue, 13 Aug 2019 08:43:27 -0500
Subject: [PATCH 3/8] Add flip axis option

---
 lib/matplotlib/axes/_axes.py | 35 +++++++++++++++++++++++++++++------
 1 file changed, 29 insertions(+), 6 deletions(-)

diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
index 31f88d62c004..a288bd569e70 100644
--- a/lib/matplotlib/axes/_axes.py
+++ b/lib/matplotlib/axes/_axes.py
@@ -2043,7 +2043,7 @@ def xcorr(self, x, y, normed=True, detrend=mlab.detrend_none,
     #### Specialized plotting
 
     # @_preprocess_data() # let 'plot' do the unpacking..
-    def step(self, x, y, *args, where='pre', data=None, **kwargs):
+    def step(self, x, y, *args, where='pre', data=None, bottom=None, flipxy=False, **kwargs):
         """
         Make a step plot.
 
@@ -2094,6 +2094,14 @@ def step(self, x, y, *args, where='pre', data=None, **kwargs):
             - 'edges': Expects len(x) = len(y) + 1, steps have y[i] value on
               the interval ``[x[i], x[i+1]), shape is closed at x[0], x[-1]``
 
+        flipxy : bool, optional, default : False
+            If *True*, flip x and y axis. You may wish to rotate instead of
+            flipping by parsing y=y[::-1]
+
+        bottom : scalar, optional, default : 0
+            If plotting with 'edges', sets low bound.
+
+
         Returns
         -------
         lines
@@ -2117,13 +2125,28 @@ def step(self, x, y, *args, where='pre', data=None, **kwargs):
                                  f"have shapes {x.shape} and "
                                  f"{y.shape}")
 
+            if flipxy:
+                y = np.r_[y[0], y]
+                x, y = y, x
+            else:
+                y = np.r_[y, y[-1]]
+
             if where == 'edges':
-                l_edgex, l_edgey = [x[0], x[0]], [0, y[0]]
-                r_edgex, r_edgey = [x[-1], x[-1]], [0, y[-1]]
-                self.add_line(mlines.Line2D(l_edgex, l_edgey))
-                self.add_line(mlines.Line2D(r_edgex, r_edgey))
+                if flipxy:
+                    self.add_line(
+                        mlines.Line2D([0 if bottom is None else bottom, x[0]],
+                                      [y[0], y[0]]))
+                    self.add_line(
+                        mlines.Line2D([0 if bottom is None else bottom, x[-1]],
+                                      [y[-1], y[-1]]))
+                else:
+                    self.add_line(
+                        mlines.Line2D([x[0], x[0]],
+                                      [0 if bottom is None else bottom, y[0]]))
+                    self.add_line(
+                        mlines.Line2D([x[-1], x[-1]],
+                                      [0 if bottom is None else bottom, y[-1]]))
 
-            y = np.r_[y, y[-1]]
             where = 'post'
 
         kwargs['drawstyle'] = 'steps-' + where

From 829062b2d141b91d55da6d6118258ee3c2c9251e Mon Sep 17 00:00:00 2001
From: andrzejnovak <novak5andrzej@gmail.com>
Date: Tue, 13 Aug 2019 09:46:47 -0500
Subject: [PATCH 4/8] Make api in line with hist()

---
 lib/matplotlib/axes/_axes.py | 29 ++++++++++++++---------------
 1 file changed, 14 insertions(+), 15 deletions(-)

diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
index a288bd569e70..b418f0323750 100644
--- a/lib/matplotlib/axes/_axes.py
+++ b/lib/matplotlib/axes/_axes.py
@@ -2043,7 +2043,8 @@ def xcorr(self, x, y, normed=True, detrend=mlab.detrend_none,
     #### Specialized plotting
 
     # @_preprocess_data() # let 'plot' do the unpacking..
-    def step(self, x, y, *args, where='pre', data=None, bottom=None, flipxy=False, **kwargs):
+    def step(self, x, y, *args, where='pre', data=None,
+             bottom=0, orientation='vertical', **kwargs):
         """
         Make a step plot.
 
@@ -2116,7 +2117,10 @@ def step(self, x, y, *args, where='pre', data=None, bottom=None, flipxy=False, *
         -----
         .. [notes section required to get data note injection right]
         """
-        cbook._check_in_list(('pre', 'post', 'mid', 'edges', 'between'), where=where)
+        cbook._check_in_list(('pre', 'post', 'mid', 'edges', 'between'),
+                             where=where)
+        cbook._check_in_list(('horizontal', 'vertical'),
+                             orientation=orientation)
         if where == 'between' or where == 'edges':
             if x.shape[0] != y.shape[0] + 1:
                 raise ValueError(f"When drawing with 'edges' or 'between', "
@@ -2125,28 +2129,23 @@ def step(self, x, y, *args, where='pre', data=None, bottom=None, flipxy=False, *
                                  f"have shapes {x.shape} and "
                                  f"{y.shape}")
 
-            if flipxy:
+            if orientation == 'horizontal':
                 y = np.r_[y[0], y]
                 x, y = y, x
-            else:
+            elif orientation == 'vertical':
                 y = np.r_[y, y[-1]]
 
             if where == 'edges':
-                if flipxy:
+                if orientation == 'horizontal':
                     self.add_line(
-                        mlines.Line2D([0 if bottom is None else bottom, x[0]],
-                                      [y[0], y[0]]))
+                        mlines.Line2D([bottom, x[0]], [y[0], y[0]]))
                     self.add_line(
-                        mlines.Line2D([0 if bottom is None else bottom, x[-1]],
-                                      [y[-1], y[-1]]))
-                else:
+                        mlines.Line2D([bottom, x[-1]], [y[-1], y[-1]]))
+                elif orientation == 'vertical':
                     self.add_line(
-                        mlines.Line2D([x[0], x[0]],
-                                      [0 if bottom is None else bottom, y[0]]))
+                        mlines.Line2D([x[0], x[0]], [bottom, y[0]]))
                     self.add_line(
-                        mlines.Line2D([x[-1], x[-1]],
-                                      [0 if bottom is None else bottom, y[-1]]))
-
+                        mlines.Line2D([x[-1], x[-1]], [bottom, y[-1]]))
             where = 'post'
 
         kwargs['drawstyle'] = 'steps-' + where

From ead2cb9aa2eca383604bc45f8b5db019bdf23a0e Mon Sep 17 00:00:00 2001
From: andrzejnovak <novak5andrzej@gmail.com>
Date: Tue, 13 Aug 2019 12:27:40 -0500
Subject: [PATCH 5/8] Add tests

---
 .../test_axes/step_histlike.png               | Bin 0 -> 8997 bytes
 lib/matplotlib/tests/test_axes.py             |  22 ++++++++++++++++++
 2 files changed, 22 insertions(+)
 create mode 100644 lib/matplotlib/tests/baseline_images/test_axes/step_histlike.png

diff --git a/lib/matplotlib/tests/baseline_images/test_axes/step_histlike.png b/lib/matplotlib/tests/baseline_images/test_axes/step_histlike.png
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/lib/matplotlib/tests/test_axes.py b/lib/matplotlib/tests/test_axes.py
index f7036342d720..3967d762dfd6 100644
--- a/lib/matplotlib/tests/test_axes.py
+++ b/lib/matplotlib/tests/test_axes.py
@@ -3696,6 +3696,28 @@ def test_step_linestyle():
         ax.set_ylim([-1, 7])
 
 
+@image_comparison(['step_histlike'], remove_text=True, extensions=['png'])
+def test_step_histlike():
+    y = np.array([6, 14, 32, 37, 48, 32, 21,  4])  # hist
+    x = np.array([1., 2., 3., 4., 5., 6., 7., 8., 9.])  # bins
+    fig, ((ax1, ax2), (ax3, ax4), (ax5, ax6), (ax7, ax8)) = plt.subplots(4, 2)
+    ax1.step(x, y, where='between')
+    ax2.step(x, y, where='between', orientation='horizontal')
+    ax3.step(x, y, where='edges')
+    ax4.step(x, y, where='edges', orientation='horizontal')
+
+    ax5.step(x, y, where='edges', bottom=-10)
+    ax6.step(x, y, where='edges', orientation='horizontal', bottom=-10)
+    ax7.step(x, y, where='edges', bottom=-10)
+    ax7.semilogy()
+    ax8.step(x, y, where='edges', orientation='horizontal', bottom=-10)
+    ax8.semilogx()
+    for ax in [ax1, ax3, ax5, ax7]:
+        ax.set_xlim(0, 10)
+    for ax in [ax2, ax4, ax6, ax8]:
+        ax.set_ylim(0, 10)
+
+
 @image_comparison(['mixed_collection'], remove_text=True)
 def test_mixed_collection():
     from matplotlib import patches

From 81b37fbb783d019e22936cc72980490e61927558 Mon Sep 17 00:00:00 2001
From: andrzejnovak <novak5andrzej@gmail.com>
Date: Tue, 13 Aug 2019 12:31:40 -0500
Subject: [PATCH 6/8] Fix description

---
 lib/matplotlib/axes/_axes.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
index b418f0323750..f7c6f2f3fa6f 100644
--- a/lib/matplotlib/axes/_axes.py
+++ b/lib/matplotlib/axes/_axes.py
@@ -2095,9 +2095,9 @@ def step(self, x, y, *args, where='pre', data=None,
             - 'edges': Expects len(x) = len(y) + 1, steps have y[i] value on
               the interval ``[x[i], x[i+1]), shape is closed at x[0], x[-1]``
 
-        flipxy : bool, optional, default : False
-            If *True*, flip x and y axis. You may wish to rotate instead of
-            flipping by parsing y=y[::-1]
+        orientation : {'vertical', 'horizontal'}, optional, default 'vertical'
+            If horizontal, switches x and y axes. You may wish to rotate
+            instead of flipping by parsing y=y[::-1]
 
         bottom : scalar, optional, default : 0
             If plotting with 'edges', sets low bound.

From 026337a32fec37f999abd898dda03584977e89ef Mon Sep 17 00:00:00 2001
From: andrzejnovak <novak5andrzej@gmail.com>
Date: Tue, 13 Aug 2019 15:24:04 -0500
Subject: [PATCH 7/8] Switch to testing with check_figures_equal()

---
 .../test_axes/step_histlike.png               | Bin 8997 -> 0 bytes
 lib/matplotlib/tests/test_axes.py             |  68 +++++++++++++-----
 2 files changed, 50 insertions(+), 18 deletions(-)
 delete mode 100644 lib/matplotlib/tests/baseline_images/test_axes/step_histlike.png

diff --git a/lib/matplotlib/tests/baseline_images/test_axes/step_histlike.png b/lib/matplotlib/tests/baseline_images/test_axes/step_histlike.png
deleted file mode 100644
index 1d00412bb839343b1660b31ce490c7978af91522..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

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diff --git a/lib/matplotlib/tests/test_axes.py b/lib/matplotlib/tests/test_axes.py
index 3967d762dfd6..efaa132d6540 100644
--- a/lib/matplotlib/tests/test_axes.py
+++ b/lib/matplotlib/tests/test_axes.py
@@ -3696,26 +3696,58 @@ def test_step_linestyle():
         ax.set_ylim([-1, 7])
 
 
-@image_comparison(['step_histlike'], remove_text=True, extensions=['png'])
-def test_step_histlike():
+@check_figures_equal()
+def test_step_histlike(fig_test, fig_ref):
+    import matplotlib.lines as mlines
     y = np.array([6, 14, 32, 37, 48, 32, 21,  4])  # hist
     x = np.array([1., 2., 3., 4., 5., 6., 7., 8., 9.])  # bins
-    fig, ((ax1, ax2), (ax3, ax4), (ax5, ax6), (ax7, ax8)) = plt.subplots(4, 2)
-    ax1.step(x, y, where='between')
-    ax2.step(x, y, where='between', orientation='horizontal')
-    ax3.step(x, y, where='edges')
-    ax4.step(x, y, where='edges', orientation='horizontal')
-
-    ax5.step(x, y, where='edges', bottom=-10)
-    ax6.step(x, y, where='edges', orientation='horizontal', bottom=-10)
-    ax7.step(x, y, where='edges', bottom=-10)
-    ax7.semilogy()
-    ax8.step(x, y, where='edges', orientation='horizontal', bottom=-10)
-    ax8.semilogx()
-    for ax in [ax1, ax3, ax5, ax7]:
-        ax.set_xlim(0, 10)
-    for ax in [ax2, ax4, ax6, ax8]:
-        ax.set_ylim(0, 10)
+    bottom = -10
+    # Test
+    fig_test, test_axes = plt.subplots(4, 2)
+    test_axes = test_axes.flatten()
+    test_axes[0].step(x, y, where='between')
+    test_axes[1].step(x, y, where='between', orientation='horizontal')
+    test_axes[2].step(x, y, where='edges')
+    test_axes[3].step(x, y, where='edges', orientation='horizontal')
+    test_axes[4].step(x, y, where='edges', bottom=-10)
+    test_axes[5].step(x, y, where='edges', orientation='horizontal',
+                      bottom=bottom)
+    test_axes[6].step(x, y, where='edges', bottom=-10)
+    test_axes[6].semilogy()
+    test_axes[7].step(x, y, where='edges', orientation='horizontal',
+                      bottom=bottom)
+    test_axes[7].semilogy()
+    # Ref
+    fig_ref, ref_axes = plt.subplots(4, 2)
+    ref_axes = ref_axes.flatten()
+    ref_axes[0].plot(x, np.r_[y, y[-1]], drawstyle='steps-post')
+    ref_axes[1].plot(np.r_[y[0], y], x, drawstyle='steps-post')
+
+    ref_axes[2].plot(x, np.r_[y, y[-1]], drawstyle='steps-post')
+    ref_axes[2].add_line(mlines.Line2D([x[0], x[0]], [0, y[0]]))
+    ref_axes[2].add_line(mlines.Line2D([x[-1], x[-1]], [0, y[-1]]))
+
+    ref_axes[3].plot(np.r_[y[0], y], x, drawstyle='steps-post')
+    ref_axes[3].add_line(mlines.Line2D([0, y[0]], [x[0], x[0]]))
+    ref_axes[3].add_line(mlines.Line2D([0, y[-1]], [x[-1], x[-1]]))
+
+    ref_axes[4].plot(x, np.r_[y, y[-1]], drawstyle='steps-post')
+    ref_axes[4].add_line(mlines.Line2D([x[0], x[0]], [bottom, y[0]]))
+    ref_axes[4].add_line(mlines.Line2D([x[-1], x[-1]], [bottom, y[-1]]))
+
+    ref_axes[5].plot(np.r_[y[0], y], x, drawstyle='steps-post')
+    ref_axes[5].add_line(mlines.Line2D([bottom, y[0]], [x[0], x[0]]))
+    ref_axes[5].add_line(mlines.Line2D([bottom, y[-1]], [x[-1], x[-1]]))
+
+    ref_axes[6].plot(x, np.r_[y, y[-1]], drawstyle='steps-post')
+    ref_axes[6].add_line(mlines.Line2D([x[0], x[0]], [bottom, y[0]]))
+    ref_axes[6].add_line(mlines.Line2D([x[-1], x[-1]], [bottom, y[-1]]))
+    ref_axes[6].semilogy()
+
+    ref_axes[7].plot(np.r_[y[0], y], x, drawstyle='steps-post')
+    ref_axes[7].add_line(mlines.Line2D([bottom, y[0]], [x[0], x[0]]))
+    ref_axes[7].add_line(mlines.Line2D([bottom, y[-1]], [x[-1], x[-1]]))
+    ref_axes[7].semilogx()
 
 
 @image_comparison(['mixed_collection'], remove_text=True)

From e6e37ed65ec8886f7bd8fd41d4de56edc31427a9 Mon Sep 17 00:00:00 2001
From: andrzejnovak <novak5andrzej@gmail.com>
Date: Thu, 15 Aug 2019 18:18:54 -0500
Subject: [PATCH 8/8] Add boilerplate/pyplot changes

---
 lib/matplotlib/pyplot.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/lib/matplotlib/pyplot.py b/lib/matplotlib/pyplot.py
index 64b055479e7c..1699f38d7a60 100644
--- a/lib/matplotlib/pyplot.py
+++ b/lib/matplotlib/pyplot.py
@@ -2916,10 +2916,13 @@ def stem(
 
 # Autogenerated by boilerplate.py.  Do not edit as changes will be lost.
 @docstring.copy(Axes.step)
-def step(x, y, *args, where='pre', data=None, **kwargs):
+def step(
+        x, y, *args, where='pre', data=None, bottom=0,
+        orientation='vertical', **kwargs):
     return gca().step(
         x, y, *args, where=where, **({"data": data} if data is not
-        None else {}), **kwargs)
+        None else {}), bottom=bottom, orientation=orientation,
+        **kwargs)
 
 
 # Autogenerated by boilerplate.py.  Do not edit as changes will be lost.