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-rw-r--r--nerv/layer/duplicate.lua4
1 files changed, 2 insertions, 2 deletions
diff --git a/nerv/layer/duplicate.lua b/nerv/layer/duplicate.lua
index fbd4a9e..1a93b26 100644
--- a/nerv/layer/duplicate.lua
+++ b/nerv/layer/duplicate.lua
@@ -30,9 +30,9 @@ function DuplicateLayer:propagate(input, output)
end
function DuplicateLayer:back_propagate(bp_err, next_bp_err)
- next_bp_err:copy_from(bp_err[1])
+ next_bp_err[1]:copy_from(bp_err[1])
for i = 2, #self.dim_out do
- next_bp_err:add(next_bp_err, bp_err[i], 1.0, 1.0)
+ next_bp_err[1]:add(next_bp_err[1], bp_err[i], 1.0, 1.0)
end
end