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local Narrow, parent = torch.class('nn.Narrow', 'nn.Module')
function Narrow:__init(dimension,offset,length)
parent.__init(self)
self.dimension=dimension
self.index=offset
self.length=length or 1
if not dimension or not offset then
error('nn.Narrow(dimension, offset, length)')
end
end
function Narrow:updateOutput(input)
local output=input:narrow(self.dimension,self.index,self.length);
self.output:resizeAs(output)
return self.output:copy(output)
end
function Narrow:updateGradInput(input, gradOutput)
self.gradInput:resizeAs(input)
self.gradInput:zero();
self.gradInput:narrow(self.dimension,self.index,self.length):copy(gradOutput)
return self.gradInput
end
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