試圖在張量流中實現最小的玩具RNN示例。 目標是學習從輸入數據到目標數據的映射,類似於這個精彩的簡潔example in theanets。張量流中的最小RNN示例
更新:我們到了那裏。剩下的唯一部分是使其趨於一致(並且不那麼複雜)。有人可以幫助將以下內容轉換爲運行代碼或提供一個簡單的示例嗎?
import tensorflow as tf
from tensorflow.python.ops import rnn_cell
init_scale = 0.1
num_steps = 7
num_units = 7
input_data = [1, 2, 3, 4, 5, 6, 7]
target = [2, 3, 4, 5, 6, 7, 7]
#target = [1,1,1,1,1,1,1] #converges, but not what we want
batch_size = 1
with tf.Graph().as_default(), tf.Session() as session:
# Placeholder for the inputs and target of the net
# inputs = tf.placeholder(tf.int32, [batch_size, num_steps])
input1 = tf.placeholder(tf.float32, [batch_size, 1])
inputs = [input1 for _ in range(num_steps)]
outputs = tf.placeholder(tf.float32, [batch_size, num_steps])
gru = rnn_cell.GRUCell(num_units)
initial_state = state = tf.zeros([batch_size, num_units])
loss = tf.constant(0.0)
# setup model: unroll
for time_step in range(num_steps):
if time_step > 0: tf.get_variable_scope().reuse_variables()
step_ = inputs[time_step]
output, state = gru(step_, state)
loss += tf.reduce_sum(abs(output - target)) # all norms work equally well? NO!
final_state = state
optimizer = tf.train.AdamOptimizer(0.1) # CONVERGEs sooo much better
train = optimizer.minimize(loss) # let the optimizer train
numpy_state = initial_state.eval()
session.run(tf.initialize_all_variables())
for epoch in range(10): # now
for i in range(7): # feed fake 2D matrix of 1 byte at a time ;)
feed_dict = {initial_state: numpy_state, input1: [[input_data[i]]]} # no
numpy_state, current_loss,_ = session.run([final_state, loss,train], feed_dict=feed_dict)
print(current_loss) # hopefully going down, always stuck at 189, why!?
也許你最好從教程開始,並從一個工作示例開發代碼:https://www.tensorflow.org/versions/master/tutorials/recurrent/index.html – GavinBrelstaff
大部分代碼*來自教程。我沒有找到一個簡單的工作示例:ptb_word_lm.py有322行 – Anona112
Reddit線程https://www.reddit.com/r/MachineLearning/comments/3sok8k/tensorflow_basic_rnn_example_with_variable_length/表明tensorflow還沒有準備好RNN工作 - 我真的很想測試它,但正如你發現沒有工作代碼來測試驅動器。 – GavinBrelstaff