Added handling of nans for bivariate element

holoviews/operation/stats.py

@@ -191,7 +191,8 @@ def _process(self, element, key=None):
         elif ymin == ymax:
             ymin, ymax = ymin-0.5, ymax+0.5
 
-        if len(element) > 1:
+        data = data[:, np.isfinite(data).min(axis=0)]
+        if len(data) > 1:
             kde = stats.gaussian_kde(data)
             if self.p.bandwidth:
                 kde.set_bandwidth(self.p.bandwidth)
@@ -200,6 +201,7 @@ def _process(self, element, key=None):
             ys = _kde_support((ymin, ymax), bw, self.p.n_samples, self.p.cut, ydim.range)
             xx, yy = cartesian_product([xs, ys], False)
             positions = np.vstack([xx.ravel(), yy.ravel()])
+            print(positions.shape)
             f = np.reshape(kde(positions).T, xx.shape)
         elif self.p.contours:
             eltype = Polygons if self.p.filled else Contours