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local Log, parent = torch.class('nn.Log', 'nn.Module')

function Log:__init(inputSize)

parent.__init(self)

end

function Log:updateOutput(input)

self.output:resizeAs(input)

self.output:copy(input)

self.output:log()

return self.output

end

function Log:updateGradInput(input, gradOutput)

self.gradInput:resizeAs(input)

self.gradInput:fill(1)

self.gradInput:cdiv(input)

self.gradInput:cmul(gradOutput)

return self.gradInput

end

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