LSTM的matlab代码
时间: 2023-11-07 18:54:50 浏览: 60
以下是一个简单的LSTM的 MATLAB 代码示例:
```
% 模型参数
input_size = 10;
hidden_size = 20;
output_size = 5;
% 初始化权重
Wf = randn(hidden_size, input_size + hidden_size);
Wi = randn(hidden_size, input_size + hidden_size);
Wc = randn(hidden_size, input_size + hidden_size);
Wo = randn(hidden_size, input_size + hidden_size);
Wy = randn(output_size, hidden_size);
bf = zeros(hidden_size, 1);
bi = zeros(hidden_size, 1);
bc = zeros(hidden_size, 1);
bo = zeros(hidden_size, 1);
by = zeros(output_size, 1);
% 初始化状态
h = zeros(hidden_size, 1);
c = zeros(hidden_size, 1);
% 输入和目标
x = randn(input_size, 1);
y = randn(output_size, 1);
% 前向传播
z = [h; x];
f = sigmoid(Wf * z + bf);
i = sigmoid(Wi * z + bi);
c_bar = tanh(Wc * z + bc);
c = f .* c + i .* c_bar;
o = sigmoid(Wo * z + bo);
h = o .* tanh(c);
y_hat = softmax(Wy * h + by);
% 计算损失
loss = -y' * log(y_hat);
% 反向传播
dy_hat = y_hat - y;
dWy = dy_hat * h';
dby = dy_hat;
dh = Wy' * dy_hat;
do = dh .* tanh(c);
dc = dh .* o .* (1 - tanh(c) .^ 2);
dc = dc + dprev_c;
df = dc .* c_prev;
di = dc .* c_bar;
dc_bar = dc .* i;
dzc = [df .* (1 - f) .* f;
di .* (1 - i) .* i;
dc_bar .* (1 - c_bar .^ 2);
do .* (1 - o) .* o];
dWh = dzc * z';
dbh = sum(dzc, 2);
dx = W(:, hidden_size+1:end)' * dzc;
dprev_h = dzc(:, 1:hidden_size)';
dprev_c = f .* dc;
```
请注意,这只是一个简单的LSTM实现,并且可能需要进行更多的优化和调整才能达到更好的性能。