32 lines
770 B
Lua
32 lines
770 B
Lua
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local RNN = {}
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function RNN.rnn(input_size, rnn_size, n)
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-- there are n+1 inputs (hiddens on each layer and x)
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local inputs = {}
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table.insert(inputs, nn.Identity()()) -- x
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for L = 1,n do
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table.insert(inputs, nn.Identity()()) -- prev_h[L]
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end
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local x, input_size_L
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local outputs = {}
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for L = 1,n do
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local prev_h = inputs[L+1]
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if L == 1 then x = inputs[1] else x = outputs[L-1] end
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if L == 1 then input_size_L = input_size else input_size_L = rnn_size end
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-- RNN tick
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local i2h = nn.Linear(input_size_L, rnn_size)(x)
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local h2h = nn.Linear(rnn_size, rnn_size)(prev_h)
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local next_h = nn.Tanh()(nn.CAddTable(){i2h, h2h})
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table.insert(outputs, next_h)
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end
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return nn.gModule(inputs, outputs)
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end
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return RNN
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