📅  最后修改于: 2020-06-17 04:38:06             🧑  作者: Mango
numpy.cbrt(arr, out = None, ufunc ‘cbrt’) : 此数学函数可帮助用户计算所有x为数组元素的x的立方根。
参数:
arr:[array_like]输入数组或对象他们的元素,我们需要平方。
返回:
对于所有x即数组元素,其立方根为x的数组
代码1:
# 解释cbrt()函数的Python程序
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))
输出:
cbrt Value of arr1 :
[ 1. 30. 4. -10.]
cbrt Value of arr2 : [ 10.0793684 -5.0396842]
代码2:使用复数
# 解释cbrt()函数的Python程序
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))
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''
代码3:图形表示
# 解释cbrt()函数的Python程序
import numpy as np
import matplotlib.pyplot as plt
a = np.linspace(start = -5, stop = 150,
num = 10, endpoint = True)
print("图示 : \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()
输出:
图示 :
[-1.70997595 2.30347441 3.08793243 3.60027433 3.99768384 4.3287262
4.61565763 4.87076238 5.10162421 5.31329285]