极客教程Python numpy.cbrt()
这个数学函数帮助用户计算所有x为数组元素的x的立方根。
语法:
numpy.cbrt(arr, out = None, ufunc ‘cbrt’) : Python
参数 :
arr : [array_like] 输入数组或对象的元素，我们需要将其平方。
返回 :
一个对所有x有立方根的数组，即数组元素
**代码 #1 : **
# Python program explaining
# cbrt () function
import numpy as np
arr1 = [1, 27000, 64, -1000]
print ("cbrt Value of arr1 : \n", np.cbrt(arr1))
arr2 = [1024 ,-128]
print ("\ncbrt Value of arr2 : ", np.cbrt(arr2))
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输出 :
cbrt Value of arr1 :
[ 1. 30. 4. -10.]
cbrt Value of arr2 : [ 10.0793684 -5.0396842]
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代码#2：与复数打交道
# Python program explaining
# cbrt () function
import numpy as np
a = 4 + 3j
print("cbrt(4 + 3j) : ", np.cbrt(a))
b = 16 + 13j
print("\ncbrt value(16 + 13j) : ", np.cbrt(b))
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输出 :
TypeError: ufunc 'cbrt' not supported for the input types,
and the inputs could not be safely coerced to any supported
types according to the casting rule ''safe''
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代码#3：图形化表示
# Python program explaining
# cbrt () function
import numpy as np
import matplotlib.pyplot as plt
a = np.linspace(start = -5, stop = 150,
num = 10, endpoint = True)
print("Graphical Representation : \n", np.cbrt(a))
plt.title("blue : with cbrt\nred : without cbrt")
plt.plot(a, np.cbrt(a))
plt.scatter(a, a, color = 'red')
plt.show()
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输出 :
Graphical Representation :
[-1.70997595 2.30347441 3.08793243 3.60027433 3.99768384 4.3287262
4.61565763 4.87076238 5.10162421 5.31329285]
Python
