Merge pull request #1410 from ebuchman/chi2sf/master

theano/tensor/basic.py

@@ -3260,6 +3260,11 @@ def gammaln(a):
 def psi(a):
     """derivative of log gamma function"""
 
+@_scal_elemwise
+def chi2sf(x, k):
+    """chi squared survival function"""
+
+
 
 @_scal_elemwise_with_nfunc('real', 1, -1)
 def real(z):

theano/tensor/inplace.py

@@ -229,6 +229,10 @@ def gammaln_inplace(a):
 def psi_inplace(a):
     """derivative of log gamma function"""
 
+@_scal_inplace
+def chi2sf_inplace(x, k):
+    """chi squared survival function"""
+
 @_scal_inplace
 def second_inplace(a):
     """Fill `a` with `b`"""