substitute the insource files with these messages
diff --git a/IPython/extensions/octavemagic.py b/IPython/extensions/octavemagic.py
new file mode 100644
index 0000000..dc93fe4
--- /dev/null
+++ b/IPython/extensions/octavemagic.py
@@ -0,0 +1,7 @@
+import warnings
+
+def load_ipython_extension(ip):
+    msg = ("The octavemagic extension has been moved to oct2py. "
+           "After installing oct2py, you can load octavemagic with the "
+           "following command: '%load_ext oct2py.ipython'.")
+    warnings.warn(msg, Warning, stacklevel=2)
diff --git a/IPython/extensions/rmagic.py b/IPython/extensions/rmagic.py
new file mode 100644
index 0000000..739e491
--- /dev/null
+++ b/IPython/extensions/rmagic.py
@@ -0,0 +1,7 @@
+import warnings
+
+def load_ipython_extension(ip):
+    msg = ("The rmagic extension has been moved to rpy2. "
+           "After installing rpy2, you can load rmagic with the "
+           "following command: '%load_ext rpy2.ipython'.")
+    warnings.warn(msg, Warning, stacklevel=2)