向量内积/点积
的点积(dot product),或称内积(inner product),定义为:
Python3
#%%
import numpy as np
from numpy import inner
x = np.array([1,2,3])
y = np.array([4,5,6])
inner_product = inner(x,y)
print(inner_product)
32
在向量空间Rn中,自然基下,向量x=(x1,…,xn)和y=(y1,…,yn)的点积(dot product),或称内积(inner product),定义为:
x⋅y=x1y1+⋯+xnyn=i=1∑nxiyi
#%%
import numpy as np
from numpy import inner
x = np.array([1,2,3])
y = np.array([4,5,6])
inner_product = inner(x,y)
print(inner_product)
32