finally added pca package again

GPy/util/initialization.py

@@ -5,13 +5,14 @@ Created on 24 Feb 2014
 '''
 
 import numpy as np
-from linalg import PCA
+from GPy.util.pca import pca
 
 def initialize_latent(init, input_dim, Y):
     Xr = np.random.randn(Y.shape[0], input_dim)
     if init == 'PCA':
-        PC = PCA(Y, input_dim)[0]
+        p = pca(Y)
+        PC = p.project(Y, min(input_dim, Y.shape[1]))
         Xr[:PC.shape[0], :PC.shape[1]] = PC
     else:
         pass
-    return Xr
+    return Xr, p.fracs[:input_dim]