From 58097a5241b6c662850948f38205b33ea1ee8255 Mon Sep 17 00:00:00 2001
From: Max Zwiessele <ibinbei@gmail.com>
Date: Wed, 16 Apr 2014 10:15:33 +0100
Subject: [PATCH] [Kern] added assertion for inputs X being matrix (ndim == 2)

---
 GPy/kern/_src/kernel_slice_operations.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/GPy/kern/_src/kernel_slice_operations.py b/GPy/kern/_src/kernel_slice_operations.py
index 353709c1..904bb65d 100644
--- a/GPy/kern/_src/kernel_slice_operations.py
+++ b/GPy/kern/_src/kernel_slice_operations.py
@@ -31,6 +31,7 @@ class KernCallsViaSlicerMeta(ParametersChangedMeta):
 
 class _Slice_wrap(object):
     def __init__(self, k, X, X2=None):
+        assert X.ndim == 2, "only matrices are allowed as inputs to kernels for now, given X.shape={!s}".format(X.shape)
         self.k = k
         self.shape = X.shape
         if (self.k.active_dims is not None) and (self.k._sliced_X == 0):