點產品

兩個張量之間的點積可以使用：

tf.matmul(a, b)

下面給出一個完整的例子：

# Build a graph
graph = tf.Graph()
with graph.as_default():
    # A 2x3 matrix
    a = tf.constant(np.array([[1, 2, 3],
                              [2, 4, 6]]),
                            dtype=tf.float32)
    # A 3x2 matrix
    b = tf.constant(np.array([[1, 10],
                              [2, 20],
                              [3, 30]]),
                    dtype=tf.float32)

    # Perform dot product
    c = tf.matmul(a, b)

# Run a Session
with tf.Session(graph=graph) as session:
    output = session.run(c)
    print(output)

列印出來

[[  14.  140.]
 [  28.  280.]]