[英]How can I fix 'InvalidArgumentError' : Placeholder problem
我只是復制了tensorboard教程,為什么會出現此錯誤?
InvalidArgumentError:您必須使用dtype float和形狀[?,1] [[節點y-input_6(定義為:19)]為占位符張量'y-input_6'提供一個值。
這是我的代碼
x_data = [[0., 0.],
[0., 1.],
[1., 0.],
[1., 1.]]
y_data = [[0.],
[1.],
[1.],
[0.]]
x_data = np.array(x_data, dtype=np.float32)
y_data = np.array(y_data, dtype=np.float32)`enter code here
X = tf.placeholder(tf.float32, [None, 2], name='x-input')
Y = tf.placeholder(tf.float32, [None, 1], name='y-input')
...
with tf.Session() as sess:
# tensorboard --logdir=./logs/xor_logs
merged_summary = tf.summary.merge_all()
writer = tf.summary.FileWriter("./logs/xor_logs_r0_01")
writer.add_graph(sess.graph) # Show the graph
# Initialize TensorFlow variables
sess.run(tf.global_variables_initializer())
for step in range(10001):
summary, _ = sess.run([merged_summary, train], feed_dict={X: x_data, Y: y_data})
writer.add_summary(summary, global_step=step)
merged_summary沒有問題。 但我需要
for step in range(10001):
sess.run(train, feed_dict={X: x_data, Y: y_data})
writer.add_summary(summary, global_step=step)
完整的代碼在這里
import tensorflow as tf
import numpy as np
tf.set_random_seed(777) # for reproducibility
learning_rate = 0.01
x_data = [[0., 0.],
[0., 1.],
[1., 0.],
[1., 1.]]
y_data = [[0.],
[1.],
[1.],
[0.]]
x_data = np.array(x_data, dtype=np.float32)
y_data = np.array(y_data, dtype=np.float32)
X = tf.placeholder(tf.float32, [None, 2], name='x-input')
Y = tf.placeholder(tf.float32, [None, 1], name='y-input')
with tf.name_scope("layer1"):
W1 = tf.Variable(tf.random_normal([2, 2]), name='weight1')
b1 = tf.Variable(tf.random_normal([2]), name='bias1')
layer1 = tf.sigmoid(tf.matmul(X, W1) + b1)
w1_hist = tf.summary.histogram("weights1", W1)
b1_hist = tf.summary.histogram("biases1", b1)
layer1_hist = tf.summary.histogram("layer1", layer1)
with tf.name_scope("layer2"):
W2 = tf.Variable(tf.random_normal([2, 1]), name='weight2')
b2 = tf.Variable(tf.random_normal([1]), name='bias2')
hypothesis = tf.sigmoid(tf.matmul(layer1, W2) + b2)
w2_hist = tf.summary.histogram("weights2", W2)
b2_hist = tf.summary.histogram("biases2", b2)
hypothesis_hist = tf.summary.histogram("hypothesis", hypothesis)
with tf.name_scope("cost"):
cost = -tf.reduce_mean(Y * tf.log(hypothesis) + (1 - Y) *
tf.log(1 - hypothesis))
cost_summ = tf.summary.scalar("cost", cost)
with tf.name_scope("train"):
train = tf.train.AdamOptimizer(learning_rate=learning_rate).minimize(cost)
predicted = tf.cast(hypothesis > 0.5, dtype=tf.float32)
accuracy = tf.reduce_mean(tf.cast(tf.equal(predicted, Y), dtype=tf.float32))
accuracy_summ = tf.summary.scalar("accuracy", accuracy)
with tf.Session() as sess:
# tensorboard --logdir=./logs/xor_logs
merged_summary = tf.summary.merge_all()
writer = tf.summary.FileWriter("./logs/xor_logs_r0_01")
writer.add_graph(sess.graph) # Show the graph
# Initialize TensorFlow variables
sess.run(tf.global_variables_initializer())
for step in range(10001):
s , _ = sess.run([merged_summary, train], feed_dict={X: x_data, Y: y_data})
writer.add_summary(summary, global_step=step)
if step % 100 == 0:
print(step, sess.run(cost, feed_dict={
X: x_data, Y: y_data}), sess.run([W1, W2]))
h, c, a = sess.run([hypothesis, predicted, accuracy],
feed_dict={X: x_data, Y: y_data})
print("\nHypothesis: ", h, "\nCorrect: ", c, "\nAccuracy: ", a)
將其添加到代碼的第一行,然后嘗試運行:
tf.reset_default_graph()
像這樣:
import tensorflow as tf
import numpy as np
tf.reset_default_graph()
tf.set_random_seed(777) # for reproducibility
learning_rate = 0.01
另外,您的代碼中存在錯誤(可能是錯字)。
更改
s , _ = sess.run([merged_summary, train], feed_dict={X: x_data, Y: y_data})
至
summary , _ = sess.run([merged_summary, train], feed_dict={X: x_data, Y: y_data})
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.