根據TensorFlow documentation,reduce_sum
函數,它有四個參數。
tf.reduce_sum(input_tensor, axis=None, keep_dims=False, name=None, reduction_indices=None).
但是reduction_indices
已被棄用。最好使用軸而不是。如果軸未設置,則縮小其全部尺寸。
作爲一個例子,這是從documentation採取
# 'x' is [[1, 1, 1]
# [1, 1, 1]]
tf.reduce_sum(x) ==> 6
tf.reduce_sum(x, 0) ==> [2, 2, 2]
tf.reduce_sum(x, 1) ==> [3, 3]
tf.reduce_sum(x, 1, keep_dims=True) ==> [[3], [3]]
tf.reduce_sum(x, [0, 1]) ==> 6
上述要求可以以這種方式被寫入,
import numpy as np
import tensorflow as tf
a = np.array([[1,7,1],[1,1,1]])
b = np.array([[0,0,0],[1,1,1]])
xtr = tf.placeholder("float", [None, 3])
xte = tf.placeholder("float", [None, 3])
pred = tf.reduce_sum(tf.square(tf.subtract(xtr, xte)),1)
# Initializing the variables
init = tf.global_variables_initializer()
# Launch the graph
with tf.Session() as sess:
sess.run(init)
nn_index = sess.run(pred, feed_dict={xtr: a, xte: b})
print nn_index