From 923224272f3e3ac81f128977560d62bc871b42fb Mon Sep 17 00:00:00 2001
From: Jacques Kvam <jwkvam@gmail.com>
Date: Sun, 18 Mar 2012 00:12:52 -0700
Subject: [PATCH 1/2] add scatter plot matrix method

---
 pandas/core/frame.py | 60 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)

diff --git a/pandas/core/frame.py b/pandas/core/frame.py
index 4d6e3176108fd..21ce2bfe3fc47 100644
--- a/pandas/core/frame.py
+++ b/pandas/core/frame.py
@@ -4018,6 +4018,66 @@ def hist(self, grid=True, **kwds):
             ax.grid(grid)
 
         return axes
+
+    def scatter_matrix(self, **kwds):
+        """
+        Draw a matrix of scatter plots.
+
+        Parameters
+        ----------
+        kwds : other plotting keyword arguments
+            To be passed to scatter function
+
+        Examples
+        --------
+        >>> df = DataFrame(np.random.randn(1000, 4), columns=['A','B','C','D'])
+        >>> df.scatter_matrix(alpha=0.2)
+        """
+        import pandas.tools.plotting as gfx
+
+        df = self._get_numeric_data()
+        n = df.columns.size
+        fig, axes = gfx.subplots(nrows=n, ncols=n)
+
+        # no gaps between subplots
+        fig.subplots_adjust(wspace=0, hspace=0)
+
+        for i, a in zip(range(n), df.columns):
+            for j, b in zip(range(n), df.columns):
+                axes[i, j].scatter(df[b], df[a], **kwds)
+                axes[i, j].yaxis.set_visible(False)
+                axes[i, j].xaxis.set_visible(False)
+
+                # setup labels
+                if i == 0 and j % 2 == 1:
+                    axes[i, j].set_xlabel(b, visible=True)
+                    axes[i, j].xaxis.set_visible(True)
+                    axes[i, j].xaxis.set_ticks_position('top')
+                    axes[i, j].xaxis.set_label_position('top')
+                if i == n - 1 and j % 2 == 0:
+                    axes[i, j].set_xlabel(b, visible=True)
+                    axes[i, j].xaxis.set_visible(True)
+                    axes[i, j].xaxis.set_ticks_position('bottom')
+                    axes[i, j].xaxis.set_label_position('bottom')
+                if j == 0 and i % 2 == 0:
+                    axes[i, j].set_ylabel(a, visible=True)
+                    axes[i, j].yaxis.set_visible(True)
+                    axes[i, j].yaxis.set_ticks_position('left')
+                    axes[i, j].yaxis.set_label_position('left')
+                if j == n - 1 and i % 2 == 1:
+                    axes[i, j].set_ylabel(a, visible=True)
+                    axes[i, j].yaxis.set_visible(True)
+                    axes[i, j].yaxis.set_ticks_position('right')
+                    axes[i, j].yaxis.set_label_position('right')
+
+        # ensure {x,y}lim off diagonal are the same as diagonal
+        for i in range(n):
+            for j in range(n):
+                if i != j:
+                    axes[i, j].set_xlim(axes[j, j].get_xlim())
+                    axes[i, j].set_ylim(axes[i, i].get_xlim())
+
+        return axes
     #----------------------------------------------------------------------
     # Deprecated stuff
 

From 913af023427a75a44b108b489c2153a80d68fc20 Mon Sep 17 00:00:00 2001
From: Jacques Kvam <jwkvam@gmail.com>
Date: Mon, 19 Mar 2012 19:22:28 -0700
Subject: [PATCH 2/2] typo

---
 pandas/core/frame.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pandas/core/frame.py b/pandas/core/frame.py
index 21ce2bfe3fc47..ae737b187a8c6 100644
--- a/pandas/core/frame.py
+++ b/pandas/core/frame.py
@@ -4075,7 +4075,7 @@ def scatter_matrix(self, **kwds):
             for j in range(n):
                 if i != j:
                     axes[i, j].set_xlim(axes[j, j].get_xlim())
-                    axes[i, j].set_ylim(axes[i, i].get_xlim())
+                    axes[i, j].set_ylim(axes[i, i].get_ylim())
 
         return axes
     #----------------------------------------------------------------------