我的输入数据一步 numpy数组长度为36 float
[-0.712982 1.14461327 -0.46141151 -0.39443004 -0.44848472 -0.65676075
0.56058383 -0.61031222 0.43211082 -0.74852234 1.28183317 0.79719085
-0.28156522 0.16901374 -0.73715878 0.69877005 -0.40633941 0.01085454
-0.33675554 -0.37056464 -0.43088505 0.3327457 -0.15905562 0.72995877
0.56962079 0.10286932 0.25698286 0.89823145 -0.12923111 0.3219386
0.10118762 1.29127014 -0.22283298 0.75640506 0.79971719 0.60000002]
我的部分代码:
X = tf.placeholder(tf.float32, (36))
Y = tf.placeholder(tf.float32)
# Create Model
# Set model weights
W = tf.Variable(tf.zeros([36], name="weight"))
b = tf.Variable(tf.zeros([1]), name="bias")
# Construct model
activation = tf.add(tf.matmul(X, W), b)
在这种情况下,tf.matmul不起作用(ValueError:Shape(36,)必须具有等级2)。 我需要做哪些更改才能将激活作为单个浮点数?
答案 0 :(得分:1)
只需使用:
activation = tf.add(tf.mul(X, W), b)
查看https://github.com/nlintz/TensorFlow-Tutorials/blob/master/1_linear_regression.py中的简单线性回归示例(和其他):
import tensorflow as tf
import numpy as np
trX = np.linspace(-1, 1, 101)
trY = 2 * trX + np.random.randn(*trX.shape) * 0.33 # create a y value which is approximately linear but with some random noise
X = tf.placeholder("float") # create symbolic variables
Y = tf.placeholder("float")
w = tf.Variable(0.0, name="weights") # create a shared variable (like theano.shared) for the weight matrix
y_model = tf.mul(X, w)
cost = tf.square(Y - y_model) # use square error for cost function
train_op = tf.train.GradientDescentOptimizer(0.01).minimize(cost) # construct an optimizer to minimize cost and fit line to my data
# Launch the graph in a session
with tf.Session() as sess:
# you need to initialize variables (in this case just variable W)
tf.initialize_all_variables().run()
for i in range(100):
for (x, y) in zip(trX, trY):
sess.run(train_op, feed_dict={X: x, Y: y})
print(sess.run(w)) # It should be something around 2