numpy.square(arr, out = None, ufunc'square'):该数学函数可帮助用户计算数组中每个元素的平方值。
参数:
arr : [array_like] Input array or object
whose elements, we need to square.
返回:
An array with square value of each array.
代码1:工作
# Python program explaining
# square () function
import numpy as np
arr1 = [ 1 , - 3 , 15 , - 466 ]
print ( "Square Value of arr1 : \n" , np.square(arr1))
arr2 = [ 23 , - 56 ]
print ( "\nSquare Value of arr2 : " , np.square(arr2))
输出:
Square Value of arr1 :
[ 1 9 225 217156]
Square Value of arr2 : [ 529 3136]
代码2:使用复数
# Python program explaining
# square () function
import numpy as np
a = 4 + 3j
print ( "Square(4 + 3j) : " , np.square(a))
b = 16 + 13j
print ( "\nSquare value(16 + 13j) : " , np.square(b))
输出:
Square(4 + 3j) : (7+24j)
Square value(16 + 13j) : (87+416j)
代码3:numpy.square()的图形表示
# Python program explaining
# square () function
import numpy as np
import matplotlib.pyplot as plt
a = np.linspace(start = - 5 , stop = 5 , num = 6 , endpoint = True )
print ( "Graphical Representation : \n" , np.square(a))
plt.title( "blue : with square\nred : without square" )
plt.plot(a, np.square(a))
plt.plot(a, a, color = 'red' )
plt.show()
输出:
Graphical Representation :
[ 25. 9. 1. 1. 9. 25.]
参考文献:
https://docs.scipy.org/doc/numpy-1.13.0/reference/generated/numpy.absolute.html
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