python dictionary dot product
dot_product = sum(dict_1[key]*dict_2.get(key, 0) for key in dict_1)python dictionary dot product
dot_product = sum(dict_1[key]*dict_2.get(key, 0) for key in dict_1)dot product python
A = [1,2,3,4,5,6]
B = [2,2,2,2,2,2]
# with numpy
import numpy as np
np.dot(A,B) # 42
np.sum(np.multiply(A,B)) # 42
#Python 3.5 has an explicit operator @ for the dot product
np.array(A)@np.array(B)# 42
# without numpy
sum([A[i]*B[i] for i in range(len(B))]) # 42dot product python
def dot_product(vector_a, vector_b):
#base case
#error message if the vectors are not of the same length
if len(vector_a) != len(vector_b):
return "ERROR: both input vectors must be of the same length"
#multiply vector_a at position i with vector_b at position i
#sum the vector made
#return that vector
return sum([vector_a[i] * vector_b[i] for i in range(len(vector_a))])Copyright © 2021 Codeinu
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