tensorflow多维张量计算实例

脚本专栏 2024/11/27 佚名

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两个三维矩阵的乘法怎样计算呢"htmlcode">

import tensorflow as tf
import numpy as np
a = tf.constant(np.arange(1, 13, dtype=np.float32), shape=[2, 2, 3])
b = tf.constant(np.arange(1, 13, dtype=np.float32), shape=[2, 3, 2])
c = tf.matmul(a, b)
# c = tf.matmul(a, b)
sess = tf.Session()
print("a*b = ", sess.run(c))
c1 = tf.matmul(a[0, :, :], b[0, :, :])
print("a[1]*b[1] = ", sess.run(c1))

运行结果：

计算结果表明，两个三维矩阵相乘，对应位置的最后两个维度的矩阵乘法。

再验证高维的张量乘法：

import tensorflow as tf
import numpy as np
a = tf.constant(np.arange(1, 36, dtype=np.float32), shape=[3, 2, 2, 3])
b = tf.constant(np.arange(1, 36, dtype=np.float32), shape=[3, 2, 3, 2])
c = tf.matmul(a, b)
# c = tf.matmul(a, b)
sess = tf.Session()
print("a*b = ", sess.run(c))
c1 = tf.matmul(a[0, 0, :, :], b[0, 0, :, :])
print("a[1]*b[1] = ", sess.run(c1))

运行结果：