dot product of two vectors
import numpy as np # input: [[1,2,3,...], [4,5,6,...], ...] def dot_product(vector, print_time= True): if print_time: print("----Dot Product----") dot_product = [] for j in range(len(vector[0])): col = [] for i in range(len(vector)): col.append(vector[i][j]) prod_col = np.prod(col) dot_product.append(prod_col) sum_dot_product = np.sum(dot_product) if print_time: print(f"input vector: {vector}, => dot product = {sum_dot_product}") print("================================") return sum_dot_product vector1 = [1,2,3] vector2 = [4,5,6] vector3 = [2,4,3] vector4 = [2,4,3] vector = [vector1, vector2, vector3, vector4] dot_product(vector) # or dot_product([vector2, vector4]) # or # the False parameter, disables the printing in the function. print(dot_product(vector,False))
dot product array
import numpy.matlib import numpy as np a = np.array([[1,2],[3,4]]) b = np.array([[11,12],[13,14]]) np.dot(a,b)
Source: www.tutorialspoint.com