The Dot Product Between Arrays
Sep 13, 2021
All the Ways !!!
The dot product or scalar product or inner product between two vectors and of the same size is defined as:
The dot product takes two vectors and returns a single number.
Defining Arrays
nparray1 = np.array([0, 1, 2, 3]) # Define an array
nparray2 = np.array([4, 5, 6, 7]) # Define an array1. Recommended Way
way_1 = np.dot(nparray1, nparray2)
Output : 382. Okayish Way
way_2 = np.sum(nparray1 * nparray2)
Output : 383. Geeks way
way_3 = nparray1 @ nparray2
Output : 384. Noobs way
#(As you never should do:)
way_4 = 0
for a, b in zip(nparray1, nparray2):
way_4 += a * bOutput : 38
I strongly recommend using np.dot, since it is the only method that accepts arrays and lists without problems !
