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local TanhShrink, parent = torch.class('nn.TanhShrink','nn.Module')
function TanhShrink:__init()
parent.__init(self)
self.tanh = nn.Tanh()
end
function TanhShrink:updateOutput(input)
local th = self.tanh:updateOutput(input)
self.output:resizeAs(input):copy(input)
self.output:add(-1,th)
return self.output
end
function TanhShrink:updateGradInput(input, gradOutput)
local dth = self.tanh:updateGradInput(input,gradOutput)
self.gradInput:resizeAs(input):copy(gradOutput)
self.gradInput:add(-1,dth)
return self.gradInput
end
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