...

1 files changed, 5 insertions, 1 deletions

diff --git a/layer/sigmoid.lua b/layer/sigmoid.lua
index d69e9e3..d0a87c0 100644
--- a/layer/sigmoid.lua
+++ b/layer/sigmoid.lua
@@ -5,10 +5,14 @@ function SigmoidLayer:__init(id, global_conf)
     self.gconf = global_conf
 end
 
+function SigmoidLayer:update(bp_err, input, output)
+    -- no params, therefore do nothing
+end
+
 function SigmoidLayer:propagate(input, output)
     output:sigmoid(input)
 end
 
 function SigmoidLayer:back_propagate(next_bp_err, bp_err, input, output)
-    next_bp_err:sigmoid(bp_err, output)
+    next_bp_err:sigmoid_grad(bp_err, output)
 end