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入门神经网络过程中遇到以下计算:
(1) (1,-1,0,0.5)'+0.905*(1,-2,1.5,0)'
Python中编程计算如下:
import numpy as np
a=np.array([[1],[-2],[1.5],[0]])*0.905
b=np.array([[1],[-1],[0],[0.5]])
c=a+b
print (c)
最终计算结果为:
[[ 1.905 ]
[-2.81 ]
[ 1.3575]
[ 0.5 ]]
(2) (1.905,-2.81,1.3575,0.5)*(1,-0.5,-1.5)'
Python中编程计算如下:
import numpy as np
a=np.mat([1.905,-2.81,1.3575,0.5])
b=np.mat([[1],[-0.5],[-2],[-1.5]])
c=a*b
print (c)
最终计算结果为:
[[-0.155]]