Dot product of two vectors in tensorflow

Question

I was wondering if there is an easy way to calculate the dot product of two vectors (i.e. 1-d tensors) and return a scalar value in tensorflow.

Given two vectors X=(

Answer 1

Let us assume that you have two column vectors

u = tf.constant([[2.], [3.]])
v = tf.constant([[5.], [7.]])

If you want a 1x1 matrix you can use

tf.einsum('ij,ik->jk',x,y)

If you are interested in a scalar you can use

tf.einsum('ij,ik->',x,y)